diff --git a/.swift-version b/.swift-version
new file mode 100644
index 0000000..9f55b2c
--- /dev/null
+++ b/.swift-version
@@ -0,0 +1 @@
+3.0
diff --git a/Example/Podfile.lock b/Example/Podfile.lock
index 04feabe..9194449 100644
--- a/Example/Podfile.lock
+++ b/Example/Podfile.lock
@@ -1,57 +1,92 @@
 PODS:
-  - Firebase/Analytics (3.2.0):
-    - FirebaseAnalytics (= 3.2.0)
-  - Firebase/Auth (3.2.0):
-    - Firebase/Analytics (= 3.2.0)
-    - FirebaseAuth (= 3.0.2)
-  - Firebase/Database (3.2.0):
-    - Firebase/Analytics (= 3.2.0)
-    - FirebaseDatabase (= 3.0.1)
-  - FirebaseAnalytics (3.2.0):
+  - Firebase/Analytics (3.10.0):
+    - Firebase/Core
+  - Firebase/Auth (3.10.0):
+    - Firebase/Core
+    - FirebaseAuth (= 3.0.6)
+  - Firebase/Core (3.10.0):
+    - FirebaseAnalytics (= 3.6.0)
+    - FirebaseCore (= 3.4.5)
+  - Firebase/Database (3.10.0):
+    - Firebase/Core
+    - FirebaseDatabase (= 3.1.1)
+  - Firebase/RemoteConfig (3.10.0):
+    - Firebase/Core
+    - FirebaseRemoteConfig (= 1.3.1)
+  - Firebase/Storage (3.10.0):
+    - Firebase/Core
+    - FirebaseStorage (= 1.0.5)
+  - FirebaseAnalytics (3.6.0):
+    - FirebaseCore (~> 3.4)
     - FirebaseInstanceID (~> 1.0)
     - GoogleInterchangeUtilities (~> 1.2)
     - GoogleSymbolUtilities (~> 1.1)
-    - GoogleUtilities (~> 1.3)
-  - FirebaseAuth (3.0.2):
-    - FirebaseAnalytics (~> 3.2)
-    - GoogleNetworkingUtilities (~> 1.2)
-    - GoogleUtilities (~> 1.3)
-  - FirebaseDatabase (3.0.1):
-    - FirebaseAnalytics (~> 3.2)
-  - FirebaseInstanceID (1.0.6)
-  - GoogleInterchangeUtilities (1.2.1):
-    - GoogleSymbolUtilities (~> 1.0)
-  - GoogleNetworkingUtilities (1.2.1):
-    - GoogleSymbolUtilities (~> 1.0)
-  - GoogleSymbolUtilities (1.1.1)
-  - GoogleUtilities (1.3.1):
-    - GoogleSymbolUtilities (~> 1.0)
+    - GoogleToolboxForMac/NSData+zlib (~> 2.1)
+  - FirebaseAuth (3.0.6):
+    - FirebaseAnalytics (~> 3.4)
+    - GoogleToolboxForMac/NSDictionary+URLArguments (~> 2.1)
+    - GTMSessionFetcher/Core (~> 1.1)
+  - FirebaseCore (3.4.5):
+    - GoogleInterchangeUtilities (~> 1.2)
+    - GoogleToolboxForMac/NSData+zlib (~> 2.1)
+  - FirebaseDatabase (3.1.1):
+    - FirebaseAnalytics (~> 3.5)
+  - FirebaseInstanceID (1.0.8)
+  - FirebaseRemoteConfig (1.3.1):
+    - FirebaseAnalytics (~> 3.4)
+    - FirebaseInstanceID (~> 1.0)
+    - GoogleInterchangeUtilities (~> 1.2)
+    - GoogleSymbolUtilities (~> 1.1)
+    - GoogleToolboxForMac/NSData+zlib (~> 2.1)
+  - FirebaseStorage (1.0.5):
+    - FirebaseAnalytics (~> 3.5)
+    - GTMSessionFetcher/Core (~> 1.1)
+  - GoogleInterchangeUtilities (1.2.2):
+    - GoogleSymbolUtilities (~> 1.1)
+  - GoogleSymbolUtilities (1.1.2)
+  - GoogleToolboxForMac/DebugUtils (2.1.0):
+    - GoogleToolboxForMac/Defines (= 2.1.0)
+  - GoogleToolboxForMac/Defines (2.1.0)
+  - GoogleToolboxForMac/NSData+zlib (2.1.0):
+    - GoogleToolboxForMac/Defines (= 2.1.0)
+  - GoogleToolboxForMac/NSDictionary+URLArguments (2.1.0):
+    - GoogleToolboxForMac/DebugUtils (= 2.1.0)
+    - GoogleToolboxForMac/Defines (= 2.1.0)
+    - GoogleToolboxForMac/NSString+URLArguments (= 2.1.0)
+  - GoogleToolboxForMac/NSString+URLArguments (2.1.0)
+  - GTMSessionFetcher/Core (1.1.7)
   - RxFirebase (0.1.0):
+    - Firebase/Analytics
     - Firebase/Auth
     - Firebase/Database
-    - RxSwift (~> 2.5)
-  - RxSwift (2.5.0)
+    - Firebase/RemoteConfig
+    - Firebase/Storage
+    - RxSwift (~> 3.0)
+  - RxSwift (3.0.1)
 
 DEPENDENCIES:
   - RxFirebase (from `../`)
 
 EXTERNAL SOURCES:
   RxFirebase:
-    :path: ../
+    :path: "../"
 
 SPEC CHECKSUMS:
-  Firebase: 6d4012da1598732a2b43f16d8355eca90f94ed59
-  FirebaseAnalytics: 6f75b04e6bfb8e0b6e9ef298e04c24eea3b13863
-  FirebaseAuth: 94b851fc345ce98036dfedfdc2eddeaef8fa3b4c
-  FirebaseDatabase: 34301d11621a83546f39f670d256477ba6f7fcea
-  FirebaseInstanceID: d014d574053a2fe84478f12f7bae96979e7051bb
-  GoogleInterchangeUtilities: def8415a862effc67d549d5b5b0b9c7a2f97d4de
-  GoogleNetworkingUtilities: 3e83269048cfb498dc7ec83ab36813360965c74f
-  GoogleSymbolUtilities: 33117db1b5f290c6fbf259585e4885b4c84b98d7
-  GoogleUtilities: 56c5ac05b7aa5dc417a1bb85221a9516e04d7032
-  RxFirebase: 59cfda204203de3c4cd0ee26b5f290990e66e32f
-  RxSwift: 402b41a50e922a0368fc14cb3bc9f4427920e8ae
+  Firebase: 387f37c7dca894a02708da9ff35ba147040eae9e
+  FirebaseAnalytics: 9c67af0ebeb8d2146c9b4ea2616439affa947b58
+  FirebaseAuth: 96e9674ff31d6e1f826d53e26aa003a57cab0295
+  FirebaseCore: 1e383fdfe37b6b5d6ff88e84204bdee30276af0f
+  FirebaseDatabase: 6de92187481ff0e8e124064f21742e95ee883b02
+  FirebaseInstanceID: ba1e640935235e5fac39dfa816fe7660e72e1a8a
+  FirebaseRemoteConfig: 383a9afe0a9291ada949e3f615257928a823b594
+  FirebaseStorage: 5738284835edb57f0e81d4ae5832bb17c1e4b5fa
+  GoogleInterchangeUtilities: d5bc4d88d5b661ab72f9d70c58d02ca8c27ad1f7
+  GoogleSymbolUtilities: 631ee17048aa5e9ab133470d768ea997a5ef9b96
+  GoogleToolboxForMac: 2b2596cbb7186865e98cadf2b1e262d851c2b168
+  GTMSessionFetcher: a1f8ed39e4fe21c68957daed472c7afbcdf29166
+  RxFirebase: bbd00c18cdc11c573889ee17be00840c82756c4d
+  RxSwift: af5680055c4ad04480189c52d28385b1029493a6
 
 PODFILE CHECKSUM: 7055416547896e7d460aa0056157b9aecb7d6deb
 
-COCOAPODS: 1.0.0
+COCOAPODS: 1.1.1
diff --git a/Example/Pods/Firebase/Headers/Firebase.h b/Example/Pods/Firebase/Core/Sources/Firebase.h
old mode 100644
new mode 100755
similarity index 97%
rename from Example/Pods/Firebase/Headers/Firebase.h
rename to Example/Pods/Firebase/Core/Sources/Firebase.h
index 025a5f9..90798a6
--- a/Example/Pods/Firebase/Headers/Firebase.h
+++ b/Example/Pods/Firebase/Core/Sources/Firebase.h
@@ -1,4 +1,5 @@
 #import <FirebaseAnalytics/FirebaseAnalytics.h>
+#import <FirebaseCore/FirebaseCore.h>
 
 #if !defined(__has_include)
   #error "Firebase.h won't import anything if your compiler doesn't support __has_include. Please \
diff --git a/Example/Pods/Firebase/Headers/module.modulemap b/Example/Pods/Firebase/Core/Sources/module.modulemap
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/Firebase/Headers/module.modulemap
rename to Example/Pods/Firebase/Core/Sources/module.modulemap
diff --git a/Example/Pods/Firebase/README.md b/Example/Pods/Firebase/README.md
old mode 100644
new mode 100755
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/FirebaseAnalytics b/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/FirebaseAnalytics
deleted file mode 100644
index 89e8feb..0000000
Binary files a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/FirebaseAnalytics and /dev/null differ
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRConfiguration.h b/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRConfiguration.h
deleted file mode 100644
index f06526e..0000000
--- a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRConfiguration.h
+++ /dev/null
@@ -1,31 +0,0 @@
-#import <Foundation/Foundation.h>
-
-#import "FIRAnalyticsConfiguration.h"
-
-/**
- * The log levels used by FIRConfiguration.
- */
-typedef NS_ENUM(NSInteger, FIRLogLevel) {
-  kFIRLogLevelError = 0,
-  kFIRLogLevelWarning,
-  kFIRLogLevelInfo,
-  kFIRLogLevelDebug,
-  kFIRLogLevelAssert,
-  kFIRLogLevelMax = kFIRLogLevelAssert
-};
-
-/**
- * This interface provides global level properties that the developer can tweak, and the singleton
- * of each Google service configuration class.
- */
-@interface FIRConfiguration : NSObject
-
-+ (FIRConfiguration *)sharedInstance;
-
-// The configuration class for Firebase Analytics.
-@property(nonatomic, readwrite) FIRAnalyticsConfiguration *analyticsConfiguration;
-
-// Global log level. Defaults to kFIRLogLevelError.
-@property(nonatomic, readwrite, assign) FIRLogLevel logLevel;
-
-@end
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIREventNames.h b/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIREventNames.h
deleted file mode 100644
index 50a9f83..0000000
--- a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIREventNames.h
+++ /dev/null
@@ -1,311 +0,0 @@
-/// @file FIREventNames.h
-///
-/// Predefined event names.
-///
-/// An Event is an important occurrence in your app that you want to measure. You can report up to
-/// 500 different types of Events per app and you can associate up to 25 unique parameters with each
-/// Event type. Some common events are suggested below, but you may also choose to specify custom
-/// Event types that are associated with your specific app. Each event type is identified by a
-/// unique name. Event names can be up to 32 characters long, may only contain alphanumeric
-/// characters and underscores ("_"), and must start with an alphabetic character. The "firebase_"
-/// prefix is reserved and should not be used.
-
-/// Add Payment Info event. This event signifies that a user has submitted their payment information
-/// to your app.
-static NSString *const kFIREventAddPaymentInfo = @"add_payment_info";
-
-/// E-Commerce Add To Cart event. This event signifies that an item was added to a cart for
-/// purchase. Add this event to a funnel with kFIREventEcommercePurchase to gauge the effectiveness
-/// of your checkout process. Note: If you supply the {@link kFIRParameterValue} parameter, you must
-/// also supply the {@link kFIRParameterCurrency} parameter so that revenue metrics can be computed
-/// accurately. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterQuantity} (signed 64-bit integer as NSNumber)</li>
-///     <li>{@link kFIRParameterItemID} (NSString)</li>
-///     <li>{@link kFIRParameterItemName} (NSString)</li>
-///     <li>{@link kFIRParameterItemCategory} (NSString)</li>
-///     <li>{@link kFIRParameterItemLocationID} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterPrice} (double as NSNumber) (optional)</li>
-///     <li>{@link kFIRParameterCurrency} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterValue} (double as NSNumber) (optional)</li>
-///     <li>{@link kFIRParameterOrigin} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterDestination} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterStartDate} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterEndDate} (NSString) (optional)</li>
-/// </ul>
-static NSString *const kFIREventAddToCart = @"add_to_cart";
-
-/// E-Commerce Add To Wishlist event. This event signifies that an item was added to a wishlist.
-/// Use this event to identify popular gift items in your app. Note: If you supply the
-/// {@link kFIRParameterValue} parameter, you must also supply the {@link kFIRParameterCurrency}
-/// parameter so that revenue metrics can be computed accurately. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterQuantity} (signed 64-bit integer as NSNumber)</li>
-///     <li>{@link kFIRParameterItemID} (NSString)</li>
-///     <li>{@link kFIRParameterItemName} (NSString)</li>
-///     <li>{@link kFIRParameterItemCategory} (NSString)</li>
-///     <li>{@link kFIRParameterItemLocationID} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterPrice} (double as NSNumber) (optional)</li>
-///     <li>{@link kFIRParameterCurrency} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterValue} (double as NSNumber) (optional)</li>
-/// </ul>
-static NSString *const kFIREventAddToWishlist = @"add_to_wishlist";
-
-/// App Open event. By logging this event when an App is moved to the foreground, developers can
-/// understand how often users leave and return during the course of a Session. Although Sessions
-/// are automatically reported, this event can provide further clarification around the continuous
-/// engagement of app-users.
-static NSString *const kFIREventAppOpen = @"app_open";
-
-/// E-Commerce Begin Checkout event. This event signifies that a user has begun the process of
-/// checking out. Add this event to a funnel with your kFIREventEcommercePurchase event to gauge the
-/// effectiveness of your checkout process. Note: If you supply the {@link kFIRParameterValue}
-/// parameter, you must also supply the {@link kFIRParameterCurrency} parameter so that revenue
-/// metrics can be computed accurately. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterValue} (double as NSNumber) (optional)</li>
-///     <li>{@link kFIRParameterCurrency} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterTransactionID} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterStartDate} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterEndDate} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterNumberOfNights} (signed 64-bit integer as NSNumber) (optional) for
-///         hotel bookings</li>
-///     <li>{@link kFIRParameterNumberOfRooms} (signed 64-bit integer as NSNumber) (optional) for
-///         hotel bookings</li>
-///     <li>{@link kFIRParameterNumberOfPassengers} (signed 64-bit integer as NSNumber) (optional)
-///         for travel bookings</li>
-///     <li>{@link kFIRParameterOrigin} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterDestination} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterTravelClass} (NSString) (optional) for travel bookings</li>
-/// </ul>
-static NSString *const kFIREventBeginCheckout = @"begin_checkout";
-
-/// E-Commerce Purchase event. This event signifies that an item was purchased by a user. Note:
-/// This is different from the in-app purchase event, which is reported automatically for App
-/// Store-based apps. Note: If you supply the {@link kFIRParameterValue} parameter, you must also
-/// supply the {@link kFIRParameterCurrency} parameter so that revenue metrics can be computed
-/// accurately. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterCurrency} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterValue} (double as NSNumber) (optional)</li>
-///     <li>{@link kFIRParameterTransactionID} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterTax} (double as NSNumber) (optional)</li>
-///     <li>{@link kFIRParameterShipping} (double as NSNumber) (optional)</li>
-///     <li>{@link kFIRParameterCoupon} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterLocation} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterStartDate} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterEndDate} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterNumberOfNights} (signed 64-bit integer as NSNumber) (optional) for
-///         hotel bookings</li>
-///     <li>{@link kFIRParameterNumberOfRooms} (signed 64-bit integer as NSNumber) (optional) for
-///         hotel bookings</li>
-///     <li>{@link kFIRParameterNumberOfPassengers} (signed 64-bit integer as NSNumber) (optional)
-///         for travel bookings</li>
-///     <li>{@link kFIRParameterOrigin} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterDestination} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterTravelClass} (NSString) (optional) for travel bookings</li>
-/// </ul>
-static NSString *const kFIREventEcommercePurchase = @"ecommerce_purchase";
-
-/// Generate Lead event. Log this event when a lead has been generated in the app to understand the
-/// efficacy of your install and re-engagement campaigns. Note: If you supply the
-/// {@link kFIRParameterValue} parameter, you must also supply the {@link kFIRParameterCurrency}
-/// parameter so that revenue metrics can be computed accurately. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterCurrency} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterValue} (double as NSNumber) (optional)</li>
-/// </ul>
-static NSString *const kFIREventGenerateLead = @"generate_lead";
-
-/// Join Group event. Log this event when a user joins a group such as a guild, team or family. Use
-/// this event to analyze how popular certain groups or social features are in your app. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterGroupID} (NSString)</li>
-/// </ul>
-static NSString *const kFIREventJoinGroup = @"join_group";
-
-/// Level Up event. This event signifies that a player has leveled up in your gaming app. It can
-/// help you gauge the level distribution of your userbase and help you identify certain levels that
-/// are difficult to pass. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterLevel} (signed 64-bit integer as NSNumber)</li>
-///     <li>{@link kFIRParameterCharacter} (NSString) (optional)</li>
-/// </ul>
-static NSString *const kFIREventLevelUp = @"level_up";
-
-/// Login event. Apps with a login feature can report this event to signify that a user has logged
-/// in.
-static NSString *const kFIREventLogin = @"login";
-
-/// Post Score event. Log this event when the user posts a score in your gaming app. This event can
-/// help you understand how users are actually performing in your game and it can help you correlate
-/// high scores with certain audiences or behaviors. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterScore} (signed 64-bit integer as NSNumber)</li>
-///     <li>{@link kFIRParameterLevel} (signed 64-bit integer as NSNumber) (optional)</li>
-///     <li>{@link kFIRParameterCharacter} (NSString) (optional)</li>
-/// </ul>
-static NSString *const kFIREventPostScore = @"post_score";
-
-/// Present Offer event. This event signifies that the app has presented a purchase offer to a user.
-/// Add this event to a funnel with the kFIREventAddToCart and kFIREventEcommercePurchase to gauge
-/// your conversion process. Note: If you supply the {@link kFIRParameterValue} parameter, you must
-/// also supply the {@link kFIRParameterCurrency} parameter so that revenue metrics can be computed
-/// accurately. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterQuantity} (signed 64-bit integer as NSNumber)</li>
-///     <li>{@link kFIRParameterItemID} (NSString)</li>
-///     <li>{@link kFIRParameterItemName} (NSString)</li>
-///     <li>{@link kFIRParameterItemCategory} (NSString)</li>
-///     <li>{@link kFIRParameterItemLocationID} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterPrice} (double as NSNumber) (optional)</li>
-///     <li>{@link kFIRParameterCurrency} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterValue} (double as NSNumber) (optional)</li>
-/// </ul>
-static NSString *const kFIREventPresentOffer = @"present_offer";
-
-/// E-Commerce Purchase Refund event. This event signifies that an item purchase was refunded.
-/// Note: If you supply the {@link kFIRParameterValue} parameter, you must also supply the
-/// {@link kFIRParameterCurrency} parameter so that revenue metrics can be computed accurately.
-/// Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterCurrency} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterValue} (double as NSNumber) (optional)</li>
-///     <li>{@link kFIRParameterTransactionID} (NSString) (optional)</li>
-/// </ul>
-static NSString *const kFIREventPurchaseRefund = @"purchase_refund";
-
-/// Search event. Apps that support search features can use this event to contextualize search
-/// operations by supplying the appropriate, corresponding parameters. This event can help you
-/// identify the most popular content in your app. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterSearchTerm} (NSString)</li>
-///     <li>{@link kFIRParameterStartDate} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterEndDate} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterNumberOfNights} (signed 64-bit integer as NSNumber) (optional) for
-///         hotel bookings</li>
-///     <li>{@link kFIRParameterNumberOfRooms} (signed 64-bit integer as NSNumber) (optional) for
-///         hotel bookings</li>
-///     <li>{@link kFIRParameterNumberOfPassengers} (signed 64-bit integer as NSNumber) (optional)
-///         for travel bookings</li>
-///     <li>{@link kFIRParameterOrigin} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterDestination} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterTravelClass} (NSString) (optional) for travel bookings</li>
-/// </ul>
-static NSString *const kFIREventSearch = @"search";
-
-/// Select Content event. This general purpose event signifies that a user has selected some content
-/// of a certain type in an app. The content can be any object in your app. This event can help you
-/// identify popular content and categories of content in your app. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterContentType} (NSString)</li>
-///     <li>{@link kFIRParameterItemID} (NSString)</li>
-/// </ul>
-static NSString *const kFIREventSelectContent = @"select_content";
-
-/// Share event. Apps with social features can log the Share event to identify the most viral
-/// content. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterContentType} (NSString)</li>
-///     <li>{@link kFIRParameterItemID} (NSString)</li>
-/// </ul>
-static NSString *const kFIREventShare = @"share";
-
-/// Sign Up event. This event indicates that a user has signed up for an account in your app. The
-/// parameter signifies the method by which the user signed up. Use this event to understand the
-/// different behaviors between logged in and logged out users. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterSignUpMethod} (NSString)</li>
-/// </ul>
-static NSString *const kFIREventSignUp = @"sign_up";
-
-/// Spend Virtual Currency event. This event tracks the sale of virtual goods in your app and can
-/// help you identify which virtual goods are the most popular objects of purchase. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterItemName} (NSString)</li>
-///     <li>{@link kFIRParameterVirtualCurrencyName} (NSString)</li>
-///     <li>{@link kFIRParameterValue} (signed 64-bit integer or double as NSNumber)</li>
-/// </ul>
-static NSString *const kFIREventSpendVirtualCurrency = @"spend_virtual_currency";
-
-/// Tutorial Begin event. This event signifies the start of the on-boarding process in your app. Use
-/// this in a funnel with kFIREventTutorialComplete to understand how many users complete this
-/// process and move on to the full app experience.
-static NSString *const kFIREventTutorialBegin = @"tutorial_begin";
-
-/// Tutorial End event. Use this event to signify the user's completion of your app's on-boarding
-/// process. Add this to a funnel with kFIREventTutorialBegin to gauge the completion rate of your
-/// on-boarding process.
-static NSString *const kFIREventTutorialComplete = @"tutorial_complete";
-
-/// Unlock Achievement event. Log this event when the user has unlocked an achievement in your
-/// game. Since achievements generally represent the breadth of a gaming experience, this event can
-/// help you understand how many users are experiencing all that your game has to offer. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterAchievementID} (NSString)</li>
-/// </ul>
-static NSString *const kFIREventUnlockAchievement = @"unlock_achievement";
-
-/// View Item event. This event signifies that some content was shown to the user. This content may
-/// be a product, a webpage or just a simple image or text. Use the appropriate parameters to
-/// contextualize the event. Use this event to discover the most popular items viewed in your app.
-/// Note: If you supply the {@link kFIRParameterValue} parameter, you must also supply the
-/// {@link kFIRParameterCurrency} parameter so that revenue metrics can be computed accurately.
-/// Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterItemID} (NSString)</li>
-///     <li>{@link kFIRParameterItemName} (NSString)</li>
-///     <li>{@link kFIRParameterItemCategory} (NSString)</li>
-///     <li>{@link kFIRParameterItemLocationID} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterPrice} (double as NSNumber) (optional)</li>
-///     <li>{@link kFIRParameterQuantity} (signed 64-bit integer as NSNumber) (optional)</li>
-///     <li>{@link kFIRParameterCurrency} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterValue} (double as NSNumber) (optional)</li>
-///     <li>{@link kFIRParameterStartDate} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterEndDate} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterFlightNumber} (NSString) (optional) for travel bookings</li>
-///     <li>{@link kFIRParameterNumberOfPassengers} (signed 64-bit integer as NSNumber) (optional)
-///         for travel bookings</li>
-///     <li>{@link kFIRParameterNumberOfNights} (signed 64-bit integer as NSNumber) (optional) for
-///         travel bookings</li>
-///     <li>{@link kFIRParameterNumberOfRooms} (signed 64-bit integer as NSNumber) (optional) for
-///         travel bookings</li>
-///     <li>{@link kFIRParameterOrigin} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterDestination} (NSString) (optional)</li>
-///     <li>{@link kFIRParameterSearchTerm} (NSString) (optional) for travel bookings</li>
-///     <li>{@link kFIRParameterTravelClass} (NSString) (optional) for travel bookings</li>
-/// </ul>
-static NSString *const kFIREventViewItem = @"view_item";
-
-/// View Item List event. Log this event when the user has been presented with a list of items of a
-/// certain category. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterItemCategory} (NSString)</li>
-/// </ul>
-static NSString *const kFIREventViewItemList = @"view_item_list";
-
-/// View Search Results event. Log this event when the user has been presented with the results of a
-/// search. Params:
-///
-/// <ul>
-///     <li>{@link kFIRParameterSearchTerm} (NSString)</li>
-/// </ul>
-static NSString *const kFIREventViewSearchResults = @"view_search_results";
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/FirebaseAnalytics b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/FirebaseAnalytics
new file mode 100755
index 0000000..52654a0
Binary files /dev/null and b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/FirebaseAnalytics differ
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRAnalytics+AppDelegate.h b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRAnalytics+AppDelegate.h
old mode 100644
new mode 100755
similarity index 94%
rename from Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRAnalytics+AppDelegate.h
rename to Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRAnalytics+AppDelegate.h
index 45ce348..e3ff4c1
--- a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRAnalytics+AppDelegate.h
+++ b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRAnalytics+AppDelegate.h
@@ -8,8 +8,8 @@
  * To save time integrating Firebase Analytics in an application, Firebase Analytics does not
  * require delegation implementation from the AppDelegate. Instead this is automatically done by
  * Firebase Analytics. Should you choose instead to delegate manually, you can turn off the App
- * Delegate Proxy by adding FirebaseAppDelegateProxyEnabled into your Info.plist and setting it
- * to NO, and adding the methods in this category to corresponding delegation handlers.
+ * Delegate Proxy by adding FirebaseAppDelegateProxyEnabled into your app's Info.plist and setting
+ * it to NO, and adding the methods in this category to corresponding delegation handlers.
  *
  * To handle Universal Links, you must return YES in
  * [UIApplicationDelegate application:didFinishLaunchingWithOptions:].
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRAnalytics.h b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRAnalytics.h
old mode 100644
new mode 100755
similarity index 60%
rename from Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRAnalytics.h
rename to Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRAnalytics.h
index a747972..34959b5
--- a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRAnalytics.h
+++ b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRAnalytics.h
@@ -5,7 +5,7 @@
 #import "FIRUserPropertyNames.h"
 
 /// The top level Firebase Analytics singleton that provides methods for logging events and setting
-/// user properties. See <a href="http://goo.gl/C2PPSP">the developer guides</a> for general
+/// user properties. See <a href="http://goo.gl/gz8SLz">the developer guides</a> for general
 /// information on using Firebase Analytics in your apps.
 @interface FIRAnalytics : NSObject
 
@@ -16,7 +16,7 @@
 /// The following event names are reserved and cannot be used:
 /// <ul>
 ///     <li>app_clear_data</li>
-///     <li>app_uninstall</li>
+///     <li>app_remove</li>
 ///     <li>app_update</li>
 ///     <li>error</li>
 ///     <li>first_open</li>
@@ -30,21 +30,22 @@
 ///     <li>user_engagement</li>
 /// </ul>
 ///
-/// @param name The name of the event. Should contain 1 to 32 alphanumeric characters or
+/// @param name The name of the event. Should contain 1 to 40 alphanumeric characters or
 ///     underscores. The name must start with an alphabetic character. Some event names are
 ///     reserved. See FIREventNames.h for the list of reserved event names. The "firebase_" prefix
 ///     is reserved and should not be used. Note that event names are case-sensitive and that
 ///     logging two events whose names differ only in case will result in two distinct events.
 /// @param parameters The dictionary of event parameters. Passing nil indicates that the event has
-///     no parameters. Parameter names can be up to 24 characters long and must start with an
+///     no parameters. Parameter names can be up to 40 characters long and must start with an
 ///     alphabetic character and contain only alphanumeric characters and underscores. Only NSString
 ///     and NSNumber (signed 64-bit integer and 64-bit floating-point number) parameter types are
-///     supported. NSString parameter values can be up to 36 characters long. The "firebase_" prefix
-///     is reserved and should not be used for parameter names.
+///     supported. NSString parameter values can be up to 100 characters long. The "firebase_"
+///     prefix is reserved and should not be used for parameter names.
 + (void)logEventWithName:(nonnull NSString *)name
               parameters:(nullable NSDictionary<NSString *, NSObject *> *)parameters;
 
-/// Sets a user property to a given value. Up to 25 user property names are supported.
+/// Sets a user property to a given value. Up to 25 user property names are supported. Once set,
+/// user property values persist throughout the app lifecycle and across sessions.
 ///
 /// The following user property names are reserved and cannot be used:
 /// <ul>
@@ -67,4 +68,28 @@
 ///     non-empty and no more than 36 characters long. Setting userID to nil removes the user ID.
 + (void)setUserID:(nullable NSString *)userID;
 
+/// Sets the current screen name, which specifies the current visual context in your app. This helps
+/// identify the areas in your app where users spend their time and how they interact with your app.
+///
+/// Note that screen reporting is enabled automatically and records the class name of the current
+/// UIViewController for you without requiring you to call this method. If you implement
+/// viewDidAppear in your UIViewController but do not call [super viewDidAppear:], that screen class
+/// will not be automatically tracked. The class name can optionally be overridden by calling this
+/// method in the viewDidAppear callback of your UIViewController and specifying the
+/// screenClassOverride parameter.
+///
+/// If your app does not use a distinct UIViewController for each screen, you should call this
+/// method and specify a distinct screenName each time a new screen is presented to the user.
+///
+/// The screen name and screen class remain in effect until the current UIViewController changes or
+/// a new call to setScreenName:screenClass: is made.
+///
+/// @param screenName The name of the current screen. Should contain 1 to 100 characters. Set to nil
+///     to clear the current screen name.
+/// @param screenClassOverride The name of the screen class. Should contain 1 to 100 characters. By
+///     default this is the class name of the current UIViewController. Set to nil to revert to the
+///     default class name.
++ (void)setScreenName:(nullable NSString *)screenName
+          screenClass:(nullable NSString *)screenClassOverride;
+
 @end
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRAnalyticsConfiguration.h b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRAnalyticsConfiguration.h
new file mode 100755
index 0000000..dc227a4
--- /dev/null
+++ b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRAnalyticsConfiguration.h
@@ -0,0 +1 @@
+#import <FirebaseCore/FIRAnalyticsConfiguration.h>
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRApp.h b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRApp.h
new file mode 100755
index 0000000..de24da1
--- /dev/null
+++ b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRApp.h
@@ -0,0 +1 @@
+#import <FirebaseCore/FIRApp.h>
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRConfiguration.h b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRConfiguration.h
new file mode 100755
index 0000000..be2ff7b
--- /dev/null
+++ b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRConfiguration.h
@@ -0,0 +1 @@
+#import <FirebaseCore/FIRConfiguration.h>
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIREventNames.h b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIREventNames.h
new file mode 100755
index 0000000..90a7e12
--- /dev/null
+++ b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIREventNames.h
@@ -0,0 +1,321 @@
+/// @file FIREventNames.h
+///
+/// Predefined event names.
+///
+/// An Event is an important occurrence in your app that you want to measure. You can report up to
+/// 500 different types of Events per app and you can associate up to 25 unique parameters with each
+/// Event type. Some common events are suggested below, but you may also choose to specify custom
+/// Event types that are associated with your specific app. Each event type is identified by a
+/// unique name. Event names can be up to 40 characters long, may only contain alphanumeric
+/// characters and underscores ("_"), and must start with an alphabetic character. The "firebase_"
+/// prefix is reserved and should not be used.
+
+/// Add Payment Info event. This event signifies that a user has submitted their payment information
+/// to your app.
+static NSString *const kFIREventAddPaymentInfo = @"add_payment_info";
+
+/// E-Commerce Add To Cart event. This event signifies that an item was added to a cart for
+/// purchase. Add this event to a funnel with kFIREventEcommercePurchase to gauge the effectiveness
+/// of your checkout process. Note: If you supply the @c kFIRParameterValue parameter, you must
+/// also supply the @c kFIRParameterCurrency parameter so that revenue metrics can be computed
+/// accurately. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterQuantity (signed 64-bit integer as NSNumber)</li>
+///     <li>@c kFIRParameterItemID (NSString)</li>
+///     <li>@c kFIRParameterItemName (NSString)</li>
+///     <li>@c kFIRParameterItemCategory (NSString)</li>
+///     <li>@c kFIRParameterItemLocationID (NSString) (optional)</li>
+///     <li>@c kFIRParameterPrice (double as NSNumber) (optional)</li>
+///     <li>@c kFIRParameterCurrency (NSString) (optional)</li>
+///     <li>@c kFIRParameterValue (double as NSNumber) (optional)</li>
+///     <li>@c kFIRParameterOrigin (NSString) (optional)</li>
+///     <li>@c kFIRParameterDestination (NSString) (optional)</li>
+///     <li>@c kFIRParameterStartDate (NSString) (optional)</li>
+///     <li>@c kFIRParameterEndDate (NSString) (optional)</li>
+/// </ul>
+static NSString *const kFIREventAddToCart = @"add_to_cart";
+
+/// E-Commerce Add To Wishlist event. This event signifies that an item was added to a wishlist.
+/// Use this event to identify popular gift items in your app. Note: If you supply the
+/// @c kFIRParameterValue parameter, you must also supply the @c kFIRParameterCurrency
+/// parameter so that revenue metrics can be computed accurately. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterQuantity (signed 64-bit integer as NSNumber)</li>
+///     <li>@c kFIRParameterItemID (NSString)</li>
+///     <li>@c kFIRParameterItemName (NSString)</li>
+///     <li>@c kFIRParameterItemCategory (NSString)</li>
+///     <li>@c kFIRParameterItemLocationID (NSString) (optional)</li>
+///     <li>@c kFIRParameterPrice (double as NSNumber) (optional)</li>
+///     <li>@c kFIRParameterCurrency (NSString) (optional)</li>
+///     <li>@c kFIRParameterValue (double as NSNumber) (optional)</li>
+/// </ul>
+static NSString *const kFIREventAddToWishlist = @"add_to_wishlist";
+
+/// App Open event. By logging this event when an App is moved to the foreground, developers can
+/// understand how often users leave and return during the course of a Session. Although Sessions
+/// are automatically reported, this event can provide further clarification around the continuous
+/// engagement of app-users.
+static NSString *const kFIREventAppOpen = @"app_open";
+
+/// E-Commerce Begin Checkout event. This event signifies that a user has begun the process of
+/// checking out. Add this event to a funnel with your kFIREventEcommercePurchase event to gauge the
+/// effectiveness of your checkout process. Note: If you supply the @c kFIRParameterValue
+/// parameter, you must also supply the @c kFIRParameterCurrency parameter so that revenue
+/// metrics can be computed accurately. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterValue (double as NSNumber) (optional)</li>
+///     <li>@c kFIRParameterCurrency (NSString) (optional)</li>
+///     <li>@c kFIRParameterTransactionID (NSString) (optional)</li>
+///     <li>@c kFIRParameterStartDate (NSString) (optional)</li>
+///     <li>@c kFIRParameterEndDate (NSString) (optional)</li>
+///     <li>@c kFIRParameterNumberOfNights (signed 64-bit integer as NSNumber) (optional) for
+///         hotel bookings</li>
+///     <li>@c kFIRParameterNumberOfRooms (signed 64-bit integer as NSNumber) (optional) for
+///         hotel bookings</li>
+///     <li>@c kFIRParameterNumberOfPassengers (signed 64-bit integer as NSNumber) (optional)
+///         for travel bookings</li>
+///     <li>@c kFIRParameterOrigin (NSString) (optional)</li>
+///     <li>@c kFIRParameterDestination (NSString) (optional)</li>
+///     <li>@c kFIRParameterTravelClass (NSString) (optional) for travel bookings</li>
+/// </ul>
+static NSString *const kFIREventBeginCheckout = @"begin_checkout";
+
+/// Earn Virtual Currency event. This event tracks the awarding of virtual currency in your app. Log
+/// this along with @c kFIREventSpendVirtualCurrency to better understand your virtual economy.
+/// Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterVirtualCurrencyName (NSString)</li>
+///     <li>@c kFIRParameterValue (signed 64-bit integer or double as NSNumber)</li>
+/// </ul>
+static NSString *const kFIREventEarnVirtualCurrency = @"earn_virtual_currency";
+
+/// E-Commerce Purchase event. This event signifies that an item was purchased by a user. Note:
+/// This is different from the in-app purchase event, which is reported automatically for App
+/// Store-based apps. Note: If you supply the @c kFIRParameterValue parameter, you must also
+/// supply the @c kFIRParameterCurrency parameter so that revenue metrics can be computed
+/// accurately. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterCurrency (NSString) (optional)</li>
+///     <li>@c kFIRParameterValue (double as NSNumber) (optional)</li>
+///     <li>@c kFIRParameterTransactionID (NSString) (optional)</li>
+///     <li>@c kFIRParameterTax (double as NSNumber) (optional)</li>
+///     <li>@c kFIRParameterShipping (double as NSNumber) (optional)</li>
+///     <li>@c kFIRParameterCoupon (NSString) (optional)</li>
+///     <li>@c kFIRParameterLocation (NSString) (optional)</li>
+///     <li>@c kFIRParameterStartDate (NSString) (optional)</li>
+///     <li>@c kFIRParameterEndDate (NSString) (optional)</li>
+///     <li>@c kFIRParameterNumberOfNights (signed 64-bit integer as NSNumber) (optional) for
+///         hotel bookings</li>
+///     <li>@c kFIRParameterNumberOfRooms (signed 64-bit integer as NSNumber) (optional) for
+///         hotel bookings</li>
+///     <li>@c kFIRParameterNumberOfPassengers (signed 64-bit integer as NSNumber) (optional)
+///         for travel bookings</li>
+///     <li>@c kFIRParameterOrigin (NSString) (optional)</li>
+///     <li>@c kFIRParameterDestination (NSString) (optional)</li>
+///     <li>@c kFIRParameterTravelClass (NSString) (optional) for travel bookings</li>
+/// </ul>
+static NSString *const kFIREventEcommercePurchase = @"ecommerce_purchase";
+
+/// Generate Lead event. Log this event when a lead has been generated in the app to understand the
+/// efficacy of your install and re-engagement campaigns. Note: If you supply the
+/// @c kFIRParameterValue parameter, you must also supply the @c kFIRParameterCurrency
+/// parameter so that revenue metrics can be computed accurately. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterCurrency (NSString) (optional)</li>
+///     <li>@c kFIRParameterValue (double as NSNumber) (optional)</li>
+/// </ul>
+static NSString *const kFIREventGenerateLead = @"generate_lead";
+
+/// Join Group event. Log this event when a user joins a group such as a guild, team or family. Use
+/// this event to analyze how popular certain groups or social features are in your app. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterGroupID (NSString)</li>
+/// </ul>
+static NSString *const kFIREventJoinGroup = @"join_group";
+
+/// Level Up event. This event signifies that a player has leveled up in your gaming app. It can
+/// help you gauge the level distribution of your userbase and help you identify certain levels that
+/// are difficult to pass. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterLevel (signed 64-bit integer as NSNumber)</li>
+///     <li>@c kFIRParameterCharacter (NSString) (optional)</li>
+/// </ul>
+static NSString *const kFIREventLevelUp = @"level_up";
+
+/// Login event. Apps with a login feature can report this event to signify that a user has logged
+/// in.
+static NSString *const kFIREventLogin = @"login";
+
+/// Post Score event. Log this event when the user posts a score in your gaming app. This event can
+/// help you understand how users are actually performing in your game and it can help you correlate
+/// high scores with certain audiences or behaviors. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterScore (signed 64-bit integer as NSNumber)</li>
+///     <li>@c kFIRParameterLevel (signed 64-bit integer as NSNumber) (optional)</li>
+///     <li>@c kFIRParameterCharacter (NSString) (optional)</li>
+/// </ul>
+static NSString *const kFIREventPostScore = @"post_score";
+
+/// Present Offer event. This event signifies that the app has presented a purchase offer to a user.
+/// Add this event to a funnel with the kFIREventAddToCart and kFIREventEcommercePurchase to gauge
+/// your conversion process. Note: If you supply the @c kFIRParameterValue parameter, you must
+/// also supply the @c kFIRParameterCurrency parameter so that revenue metrics can be computed
+/// accurately. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterQuantity (signed 64-bit integer as NSNumber)</li>
+///     <li>@c kFIRParameterItemID (NSString)</li>
+///     <li>@c kFIRParameterItemName (NSString)</li>
+///     <li>@c kFIRParameterItemCategory (NSString)</li>
+///     <li>@c kFIRParameterItemLocationID (NSString) (optional)</li>
+///     <li>@c kFIRParameterPrice (double as NSNumber) (optional)</li>
+///     <li>@c kFIRParameterCurrency (NSString) (optional)</li>
+///     <li>@c kFIRParameterValue (double as NSNumber) (optional)</li>
+/// </ul>
+static NSString *const kFIREventPresentOffer = @"present_offer";
+
+/// E-Commerce Purchase Refund event. This event signifies that an item purchase was refunded.
+/// Note: If you supply the @c kFIRParameterValue parameter, you must also supply the
+/// @c kFIRParameterCurrency parameter so that revenue metrics can be computed accurately.
+/// Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterCurrency (NSString) (optional)</li>
+///     <li>@c kFIRParameterValue (double as NSNumber) (optional)</li>
+///     <li>@c kFIRParameterTransactionID (NSString) (optional)</li>
+/// </ul>
+static NSString *const kFIREventPurchaseRefund = @"purchase_refund";
+
+/// Search event. Apps that support search features can use this event to contextualize search
+/// operations by supplying the appropriate, corresponding parameters. This event can help you
+/// identify the most popular content in your app. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterSearchTerm (NSString)</li>
+///     <li>@c kFIRParameterStartDate (NSString) (optional)</li>
+///     <li>@c kFIRParameterEndDate (NSString) (optional)</li>
+///     <li>@c kFIRParameterNumberOfNights (signed 64-bit integer as NSNumber) (optional) for
+///         hotel bookings</li>
+///     <li>@c kFIRParameterNumberOfRooms (signed 64-bit integer as NSNumber) (optional) for
+///         hotel bookings</li>
+///     <li>@c kFIRParameterNumberOfPassengers (signed 64-bit integer as NSNumber) (optional)
+///         for travel bookings</li>
+///     <li>@c kFIRParameterOrigin (NSString) (optional)</li>
+///     <li>@c kFIRParameterDestination (NSString) (optional)</li>
+///     <li>@c kFIRParameterTravelClass (NSString) (optional) for travel bookings</li>
+/// </ul>
+static NSString *const kFIREventSearch = @"search";
+
+/// Select Content event. This general purpose event signifies that a user has selected some content
+/// of a certain type in an app. The content can be any object in your app. This event can help you
+/// identify popular content and categories of content in your app. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterContentType (NSString)</li>
+///     <li>@c kFIRParameterItemID (NSString)</li>
+/// </ul>
+static NSString *const kFIREventSelectContent = @"select_content";
+
+/// Share event. Apps with social features can log the Share event to identify the most viral
+/// content. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterContentType (NSString)</li>
+///     <li>@c kFIRParameterItemID (NSString)</li>
+/// </ul>
+static NSString *const kFIREventShare = @"share";
+
+/// Sign Up event. This event indicates that a user has signed up for an account in your app. The
+/// parameter signifies the method by which the user signed up. Use this event to understand the
+/// different behaviors between logged in and logged out users. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterSignUpMethod (NSString)</li>
+/// </ul>
+static NSString *const kFIREventSignUp = @"sign_up";
+
+/// Spend Virtual Currency event. This event tracks the sale of virtual goods in your app and can
+/// help you identify which virtual goods are the most popular objects of purchase. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterItemName (NSString)</li>
+///     <li>@c kFIRParameterVirtualCurrencyName (NSString)</li>
+///     <li>@c kFIRParameterValue (signed 64-bit integer or double as NSNumber)</li>
+/// </ul>
+static NSString *const kFIREventSpendVirtualCurrency = @"spend_virtual_currency";
+
+/// Tutorial Begin event. This event signifies the start of the on-boarding process in your app. Use
+/// this in a funnel with kFIREventTutorialComplete to understand how many users complete this
+/// process and move on to the full app experience.
+static NSString *const kFIREventTutorialBegin = @"tutorial_begin";
+
+/// Tutorial End event. Use this event to signify the user's completion of your app's on-boarding
+/// process. Add this to a funnel with kFIREventTutorialBegin to gauge the completion rate of your
+/// on-boarding process.
+static NSString *const kFIREventTutorialComplete = @"tutorial_complete";
+
+/// Unlock Achievement event. Log this event when the user has unlocked an achievement in your
+/// game. Since achievements generally represent the breadth of a gaming experience, this event can
+/// help you understand how many users are experiencing all that your game has to offer. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterAchievementID (NSString)</li>
+/// </ul>
+static NSString *const kFIREventUnlockAchievement = @"unlock_achievement";
+
+/// View Item event. This event signifies that some content was shown to the user. This content may
+/// be a product, a webpage or just a simple image or text. Use the appropriate parameters to
+/// contextualize the event. Use this event to discover the most popular items viewed in your app.
+/// Note: If you supply the @c kFIRParameterValue parameter, you must also supply the
+/// @c kFIRParameterCurrency parameter so that revenue metrics can be computed accurately.
+/// Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterItemID (NSString)</li>
+///     <li>@c kFIRParameterItemName (NSString)</li>
+///     <li>@c kFIRParameterItemCategory (NSString)</li>
+///     <li>@c kFIRParameterItemLocationID (NSString) (optional)</li>
+///     <li>@c kFIRParameterPrice (double as NSNumber) (optional)</li>
+///     <li>@c kFIRParameterQuantity (signed 64-bit integer as NSNumber) (optional)</li>
+///     <li>@c kFIRParameterCurrency (NSString) (optional)</li>
+///     <li>@c kFIRParameterValue (double as NSNumber) (optional)</li>
+///     <li>@c kFIRParameterStartDate (NSString) (optional)</li>
+///     <li>@c kFIRParameterEndDate (NSString) (optional)</li>
+///     <li>@c kFIRParameterFlightNumber (NSString) (optional) for travel bookings</li>
+///     <li>@c kFIRParameterNumberOfPassengers (signed 64-bit integer as NSNumber) (optional)
+///         for travel bookings</li>
+///     <li>@c kFIRParameterNumberOfNights (signed 64-bit integer as NSNumber) (optional) for
+///         travel bookings</li>
+///     <li>@c kFIRParameterNumberOfRooms (signed 64-bit integer as NSNumber) (optional) for
+///         travel bookings</li>
+///     <li>@c kFIRParameterOrigin (NSString) (optional)</li>
+///     <li>@c kFIRParameterDestination (NSString) (optional)</li>
+///     <li>@c kFIRParameterSearchTerm (NSString) (optional) for travel bookings</li>
+///     <li>@c kFIRParameterTravelClass (NSString) (optional) for travel bookings</li>
+/// </ul>
+static NSString *const kFIREventViewItem = @"view_item";
+
+/// View Item List event. Log this event when the user has been presented with a list of items of a
+/// certain category. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterItemCategory (NSString)</li>
+/// </ul>
+static NSString *const kFIREventViewItemList = @"view_item_list";
+
+/// View Search Results event. Log this event when the user has been presented with the results of a
+/// search. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterSearchTerm (NSString)</li>
+/// </ul>
+static NSString *const kFIREventViewSearchResults = @"view_search_results";
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIROptions.h b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIROptions.h
new file mode 100755
index 0000000..126824b
--- /dev/null
+++ b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIROptions.h
@@ -0,0 +1 @@
+#import <FirebaseCore/FIROptions.h>
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRParameterNames.h b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRParameterNames.h
old mode 100644
new mode 100755
similarity index 96%
rename from Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRParameterNames.h
rename to Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRParameterNames.h
index 42c0c5e..24cf394
--- a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRParameterNames.h
+++ b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRParameterNames.h
@@ -5,9 +5,9 @@
 /// Params supply information that contextualize Events. You can associate up to 25 unique Params
 /// with each Event type. Some Params are suggested below for certain common Events, but you are
 /// not limited to these. You may supply extra Params for suggested Events or custom Params for
-/// Custom events. Param names can be up to 24 characters long, may only contain alphanumeric
+/// Custom events. Param names can be up to 40 characters long, may only contain alphanumeric
 /// characters and underscores ("_"), and must start with an alphabetic character. Param values can
-/// be up to 36 characters long. The "firebase_" prefix is reserved and should not be used.
+/// be up to 100 characters long. The "firebase_" prefix is reserved and should not be used.
 
 /// Game achievement ID (NSString).
 /// <pre>
@@ -283,8 +283,8 @@ static NSString *const kFIRParameterTravelClass = @"travel_class";
 /// a general purpose parameter that is useful for accumulating a key metric that pertains to an
 /// event. Examples include revenue, distance, time and points. Value should be specified as signed
 /// 64-bit integer or double as NSNumber. Notes: Currency-related values should be supplied using
-/// double as NSNumber and must be accompanied by a {@link kFIRParameterCurrency} parameter. The
-/// valid range of accumulated values is [-9,223,372,036,854.77, 9,223,372,036,854.77].
+/// double as NSNumber and must be accompanied by a @c kFIRParameterCurrency parameter. The valid
+/// range of accumulated values is [-9,223,372,036,854.77, 9,223,372,036,854.77].
 /// <pre>
 ///     NSDictionary *params = @{
 ///       kFIRParameterValue : @(3.99),
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRUserPropertyNames.h b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRUserPropertyNames.h
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRUserPropertyNames.h
rename to Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FIRUserPropertyNames.h
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FirebaseAnalytics.h b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FirebaseAnalytics.h
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FirebaseAnalytics.h
rename to Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Headers/FirebaseAnalytics.h
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Modules/module.modulemap b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Modules/module.modulemap
old mode 100644
new mode 100755
similarity index 76%
rename from Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Modules/module.modulemap
rename to Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Modules/module.modulemap
index 65f7ed9..ca618dc
--- a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Modules/module.modulemap
+++ b/Example/Pods/FirebaseAnalytics/Frameworks/frameworks/FirebaseAnalytics.framework/Modules/module.modulemap
@@ -14,11 +14,7 @@ framework module FirebaseAnalytics {
   header "FIRParameterNames.h"
   header "FIRUserPropertyNames.h"
 
-  link framework "AddressBook"
-  link framework "AdSupport"
-  link framework "SafariServices"
   link framework "StoreKit"
-  link framework "SystemConfiguration"
 
   link "c++"
   link "sqlite3"
diff --git a/Example/Pods/FirebaseAuth/CHANGELOG.md b/Example/Pods/FirebaseAuth/CHANGELOG.md
new file mode 100755
index 0000000..99d2873
--- /dev/null
+++ b/Example/Pods/FirebaseAuth/CHANGELOG.md
@@ -0,0 +1,23 @@
+# 2016-10-24 -- v3.0.6
+- Switches to depend on open sourced GoogleToolboxForMac and GTMSessionFetcher.
+- Improves logging of keychain error when initializing.
+
+# 2016-09-14 -- v3.0.5
+- Works around a keychain issue in iOS 10 simulator.
+- Reports the correct error for invalid email when signing in with email and
+  password.
+
+# 2016-07-18 -- v3.0.4
+- Fixes a race condition bug that could crash the app with an exception from
+  NSURLSession on iOS 9.
+
+# 2016-06-20 -- v3.0.3
+- Adds documentation for all possible errors returned by each method.
+- Improves error handling and messages for a variety of error conditions.
+- Whether or not an user is considered anonymous is now consistent with other
+  platforms.
+- A saved signed in user is now siloed between different Firebase projects
+  within the same app.
+
+# 2016-05-18 -- v3.0.2
+- Initial public release.
diff --git a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRAuthErrors.h b/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRAuthErrors.h
deleted file mode 100644
index 12e848a..0000000
--- a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRAuthErrors.h
+++ /dev/null
@@ -1,159 +0,0 @@
-/** @file FIRAuthErrors.h
-    @brief Firebase Auth SDK
-    @copyright Copyright 2015 Google Inc.
-    @remarks Use of this SDK is subject to the Google APIs Terms of Service:
-        https://developers.google.com/terms/
- */
-
-#import <Foundation/Foundation.h>
-
-/** @var FIRAuthErrorDomain
-    @brief The Firebase Auth error domain.
- */
-extern NSString *const FIRAuthErrorDomain;
-
-/** @var FIRAuthErrorNameKey
-    @brief The name of the key for the "error_name" string in the NSError userinfo dictionary.
- */
-extern NSString *const FIRAuthErrorNameKey;
-
-/** @var FIRAuthErrorCode
-    @brief Error codes used by Firebase Auth.
- */
-typedef NS_ENUM(NSInteger, FIRAuthErrorCode) {
-  /** @var FIRAuthErrorCodeInvalidCustomToken
-      @brief Indicates a validation error with the custom token.
-   */
-  FIRAuthErrorCodeInvalidCustomToken = 17000,
-
-  /** @var FIRAuthErrorCodeCustomTokenMismatch
-      @brief Indicates the service account and the API key belong to different projects.
-   */
-  FIRAuthErrorCodeCustomTokenMismatch = 17002,
-
-  /** @var FIRAuthErrorCodeInvalidCredential
-      @brief Indicates the IDP token or requestUri is invalid.
-   */
-  FIRAuthErrorCodeInvalidCredential = 17004,
-
-  /** @var FIRAuthErrorCodeUserDisabled
-      @brief Indicates the user's account is disabled on the server side.
-   */
-  FIRAuthErrorCodeUserDisabled = 17005,
-
-  /** @var FIRAuthErrorCodeOperationNotAllowed
-      @brief Indicates the administrator disabled sign in with the specified identity provider.
-   */
-  FIRAuthErrorCodeOperationNotAllowed = 17006,
-
-  /** @var FIRAuthErrorCodeEmailAlreadyInUse
-      @brief Indicates the email used to attempt a sign up already exists.
-   */
-  FIRAuthErrorCodeEmailAlreadyInUse = 17007,
-
-  /** @var FIRAuthErrorCodeInvalidEmail
-      @brief Indicates the email is invalid.
-  */
-  FIRAuthErrorCodeInvalidEmail = 17008,
-
-  /** @var FIRAuthErrorCodeWrongPassword
-      @brief Indicates the user attempted sign in with a wrong password.
-   */
-  FIRAuthErrorCodeWrongPassword = 17009,
-
-  /** @var FIRAuthErrorCodeTooManyRequests
-      @brief Indicates that too many requests were made to a serve method.
-   */
-  FIRAuthErrorCodeTooManyRequests = 17010,
-
-  /** @var FIRAuthErrorCodeUserNotFound
-      @brief Indicates the user account was been found.
-   */
-  FIRAuthErrorCodeUserNotFound = 17011,
-
-  /** @var FIRAuthErrrorCodeAccountExistsWithDifferentCredential
-      @brief Indicates account linking is needed.
-   */
-  FIRAuthErrrorCodeAccountExistsWithDifferentCredential = 17012,
-
-  /** @var FIRAuthErrorCodeRequiresRecentLogin
-      @brief Indicates the user has attemped to change email or password more than 5 minutes after
-          signing in.
-   */
-  FIRAuthErrorCodeRequiresRecentLogin = 17014,
-
-  /** @var FIRAuthErrorCodeProviderAlreadyLinked
-      @brief Indicates an attempt to link a provider to which we are already linked.
-   */
-  FIRAuthErrorCodeProviderAlreadyLinked = 17015,
-
-  /** @var FIRAuthErrorCodeNoSuchProvider
-      @brief Indicates an attempt to unlink a provider that is not linked.
-   */
-  FIRAuthErrorCodeNoSuchProvider = 17016,
-
-  /** @var FIRAuthErrorCodeInvalidUserToken
-      @brief Indicates user's saved auth credential is invalid, the user needs to sign in again.
-   */
-  FIRAuthErrorCodeInvalidUserToken = 17017,
-
-  /** @var FIRAuthErrorCodeNetworkError
-      @brief Indicates a network error occurred (such as a timeout, interrupted connection, or
-          unreachable host.)
-      @remarks These types of errors are often recoverable with a retry.
-
-          The @c NSUnderlyingError field in the @c NSError.userInfo dictionary will contain the
-          error encountered.
-   */
-  FIRAuthErrorCodeNetworkError = 17020,
-
-  /** @var FIRAuthErrorCodeUserTokenExpired
-      @brief Indicates the saved token has expired, for example, the user may have changed account
-          password on another device. The user needs to sign in again on this device.
-   */
-  FIRAuthErrorCodeUserTokenExpired = 17021,
-
-  /** @var FIRAuthErrorCodeInvalidAPIKey
-      @brief Indicates an invalid API key was supplied in the request.
-   */
-  FIRAuthErrorCodeInvalidAPIKey = 17023,
-
-  /** @var FIRAuthErrorCodeUserMismatch
-      @brief Indicates that user attempted to reauthenticate with a user other than the current
-          user.
-   */
-  FIRAuthErrorCodeUserMismatch = 17024,
-
-  /** @var FIRAuthErrorCodeCredentialAlreadyInUse
-      @brief Indicates an attempt to link with a credential that has already been linked with a
-          different Firebase account.
-   */
-  FIRAuthErrorCodeCredentialAlreadyInUse = 17025,
-
-  /** @var FIRAuthErrorCodeWeakPassword
-      @brief Indicates an attempt to set a password that is considered too weak.
-      @remarks The @c NSLocalizedFailureReasonErrorKey field in the @c NSError.userInfo dictionary
-          will contain more detailed explanation that can be shown to the user.
-   */
-  FIRAuthErrorCodeWeakPassword = 17026,
-
-  /** @var FIRAuthErrorCodeAppNotAuthorized
-      @brief Indicates the App is not authorized to use Firebase Authentication with the
-          provided API Key.
-   */
-  FIRAuthErrorCodeAppNotAuthorized = 17028,
-
-  /** @var FIRAuthErrorCodeKeychainError
-      @brief Indicated an error occurred for accessing the keychain.
-      @remarks The @c NSLocalizedFailureReasonErrorKey field in the @c NSError.userInfo dictionary
-          will contain more information about the error encountered.
-   */
-  FIRAuthErrorCodeKeychainError = 17995,
-
-  /** @var FIRAuthErrorCodeInternalError
-      @brief Indicates an internal error occurred.
-      @remarks The @c NSUnderlyingError field in the @c NSError.userInfo dictionary will contain the
-          error encountered.
-   */
-  FIRAuthErrorCodeInternalError = 17999,
-};
diff --git a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/FirebaseAuth b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/FirebaseAuth
old mode 100644
new mode 100755
similarity index 57%
rename from Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/FirebaseAuth
rename to Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/FirebaseAuth
index b03e9f7..bed95b3
Binary files a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/FirebaseAuth and b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/FirebaseAuth differ
diff --git a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRAuth.h b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRAuth.h
old mode 100644
new mode 100755
similarity index 67%
rename from Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRAuth.h
rename to Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRAuth.h
index 1f920f1..d80b8ec
--- a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRAuth.h
+++ b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRAuth.h
@@ -103,6 +103,9 @@ typedef void (^FIRSendPasswordResetCallback)(NSError *_Nullable error);
     @param completion Optionally; a block which is invoked when the list of providers for the
         specified email address is ready or an error was encountered. Invoked asynchronously on the
         main thread in the future.
+    @remarks Possible error codes:
+        - @c FIRAuthErrorCodeInvalidEmail - Indicates the email address is malformed.
+        - See @c FIRAuthErrors for a list of error codes that are common to all API methods.
  */
 - (void)fetchProvidersForEmail:(NSString *)email
                     completion:(nullable FIRProviderQueryCallback)completion;
@@ -113,6 +116,14 @@ typedef void (^FIRSendPasswordResetCallback)(NSError *_Nullable error);
     @param password The user's password.
     @param completion Optionally; a block which is invoked when the sign in flow finishes, or is
         canceled. Invoked asynchronously on the main thread in the future.
+    @remarks Possible error codes:
+        - @c FIRAuthErrorCodeOperationNotAllowed Indicates that email and password accounts are not
+            enabled. Enable them in the Auth section of the Firebase console.
+        - @c FIRAuthErrorCodeUserDisabled Indicates the user's account is disabled.
+        - @c FIRAuthErrorCodeWrongPassword Indicates the user attempted sign in with an incorrect
+            password.
+        - @c FIRAuthErrorCodeInvalidEmail - Indicates the email address is malformed.
+        - See @c FIRAuthErrors for a list of error codes that are common to all API methods.
  */
 - (void)signInWithEmail:(NSString *)email
                password:(NSString *)password
@@ -122,8 +133,26 @@ typedef void (^FIRSendPasswordResetCallback)(NSError *_Nullable error);
     @brief Asynchronously signs in to Firebase with the given 3rd-party credentials (e.g. a Facebook
         login Access Token, a Google ID Token/Access Token pair, etc.)
     @param credential The credential supplied by the IdP.
-    @param completion Optionally; a block which is invoked when the sign in finishes, or is
+    @param completion Optionally; a block which is invoked when the sign in flow finishes, or is
         canceled. Invoked asynchronously on the main thread in the future.
+    @remarks Possible error codes:
+        - @c FIRAuthErrorCodeInvalidCredential Indicates the supplied credential is invalid. This
+            could happen if it has expired or it is malformed.
+        - @c FIRAuthErrorCodeOperationNotAllowed Indicates that accounts with the identity provider
+            represented by the credential are not enabled. Enable them in the Auth section of the
+            Firebase console.
+        - @c FIRAuthErrorCodeEmailAlreadyInUse Indicates the email asserted by the credential
+            (e.g. the email in a Facebook access token) is already in use by an existing account,
+            that cannot be authenticated with this sign-in method. Call fetchProvidersForEmail for
+            this user’s email and then prompt them to sign in with any of the sign-in providers
+            returned. This error will only be thrown if the “One account per email address”
+            setting is enabled in the Firebase console, under Auth settings. - Please note that the
+            error code raised in this specific situation may not be the same on Web and Android.
+        - @c FIRAuthErrorCodeUserDisabled Indicates the user's account is disabled.
+        - @c FIRAuthErrorCodeWrongPassword Indicates the user attempted sign in with a incorrect
+            password, if credential is of the type EmailPasswordAuthCredential.
+        - @c FIRAuthErrorCodeInvalidEmail - Indicates the email address is malformed.
+        - See @c FIRAuthErrors for a list of error codes that are common to all API methods.
  */
 - (void)signInWithCredential:(FIRAuthCredential *)credential
                   completion:(nullable FIRAuthResultCallback)completion;
@@ -134,6 +163,10 @@ typedef void (^FIRSendPasswordResetCallback)(NSError *_Nullable error);
         canceled. Invoked asynchronously on the main thread in the future.
     @remarks If there is already an anonymous user signed in, that user will be returned instead.
         If there is any other existing user signed in, that user will be signed out.
+    @remarks Possible error codes:
+        - @c FIRAuthErrorCodeOperationNotAllowed Indicates that anonymous accounts are not enabled.
+            Enable them in the Auth section of the Firebase console.
+        - See @c FIRAuthErrors for a list of error codes that are common to all API methods.
  */
 - (void)signInAnonymouslyWithCompletion:(nullable FIRAuthResultCallback)completion;
 
@@ -142,6 +175,11 @@ typedef void (^FIRSendPasswordResetCallback)(NSError *_Nullable error);
     @param token A self-signed custom auth token.
     @param completion Optionally; a block which is invoked when the sign in finishes, or is
         canceled. Invoked asynchronously on the main thread in the future.
+    @remarks Possible error codes:
+        - @c FIRAuthErrorCodeInvalidCustomToken Indicates a validation error with the custom token.
+        - @c FIRAuthErrorCodeCustomTokenMismatch Indicates the service account and the API key
+            belong to different projects.
+        - See @c FIRAuthErrors for a list of error codes that are common to all API methods.
  */
 - (void)signInWithCustomToken:(NSString *)token
                    completion:(nullable FIRAuthResultCallback)completion;
@@ -150,8 +188,19 @@ typedef void (^FIRSendPasswordResetCallback)(NSError *_Nullable error);
     @brief Creates and, on success, signs in a user with the given email address and password.
     @param email The user's email address.
     @param password The user's desired password.
-    @param completion Optionally; a block which is invoked when the sign up finishes, or is
+    @param completion Optionally; a block which is invoked when the sign up flow finishes, or is
         canceled. Invoked asynchronously on the main thread in the future.
+    @remarks Possible error codes:
+        - @c FIRAuthErrorCodeInvalidEmail - Indicates the email address is malformed.
+        - @c FIRAuthErrorCodeEmailAlreadyInUse Indicates the email used to attempt sign up
+            already exists. Call fetchProvidersForEmail to check which sign-in mechanisms the user
+            used, and prompt the user to sign in with one of those.
+        - @c FIRAuthErrorCodeOperationNotAllowed Indicates that email and password accounts are not
+            enabled. Enable them in the Auth section of the Firebase console.
+        - @c FIRAuthErrorCodeWeakPassword Indicates an attempt to set a password that is considered
+            too weak. The NSLocalizedFailureReasonErrorKey field in the NSError.userInfo dictionary
+            object will contain more detailed explanation that can be shown to the user.
+        - See @c FIRAuthErrors for a list of error codes that are common to all API methods.
  */
 - (void)createUserWithEmail:(NSString *)email
                    password:(NSString *)password
@@ -162,6 +211,8 @@ typedef void (^FIRSendPasswordResetCallback)(NSError *_Nullable error);
     @param email The email address of the user.
     @param completion Optionally; a block which is invoked when the request finishes. Invoked
         asynchronously on the main thread in the future.
+    @remarks Possible error codes:
+        - See @c FIRAuthErrors for a list of error codes that are common to all API methods.
  */
 - (void)sendPasswordResetWithEmail:(NSString *)email
                         completion:(nullable FIRSendPasswordResetCallback)completion;
@@ -171,6 +222,10 @@ typedef void (^FIRSendPasswordResetCallback)(NSError *_Nullable error);
     @param error Optionally; if an error occurs, upon return contains an NSError object that
         describes the problem; is nil otherwise.
     @return @YES when the sign out request was successful. @NO otherwise.
+    @remarks Possible error codes:
+        - @c FIRAuthErrorCodeKeychainError Indicates an error occurred when accessing the keychain.
+            The @c NSLocalizedFailureReasonErrorKey field in the @c NSError.userInfo dictionary
+            will contain more information about the error encountered.
  */
 - (BOOL)signOut:(NSError *_Nullable *_Nullable)error;
 
diff --git a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRAuthCredential.h b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRAuthCredential.h
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRAuthCredential.h
rename to Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRAuthCredential.h
diff --git a/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRAuthErrors.h b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRAuthErrors.h
new file mode 100755
index 0000000..9b32328
--- /dev/null
+++ b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRAuthErrors.h
@@ -0,0 +1,166 @@
+/** @file FIRAuthErrors.h
+    @brief Firebase Auth SDK
+    @copyright Copyright 2015 Google Inc.
+    @remarks Use of this SDK is subject to the Google APIs Terms of Service:
+        https://developers.google.com/terms/
+ */
+
+#import <Foundation/Foundation.h>
+
+/** @class FIRAuthErrors
+    @remarks Error Codes common to all API Methods:
+        - FIRAuthErrorCodeNetworkError - Indicates a network error occurred during the operation.
+        - FIRAuthErrorCodeUserNotFound - Indicates the user account was not found. This could happen
+            if the user account has been deleted.
+        - FIRAuthErrorCodeUserTokenExpired - Indicates the current user’s token has expired, for
+            example, the user may have changed account password on another device. You must prompt
+            the user to sign in again on this device.
+        - FIRAuthErrorCodeTooManyRequests - Indicates that the request has been blocked after an
+            abnormal number of requests have been made from the caller device to the Firebase Auth
+            servers. Retry again after some time.
+        - FIRAuthErrorCodeInvalidAPIKey - Indicates the application has been configured with an
+            invalid API key.
+        - FIRAuthErrorCodeAppNotAuthorized - Indicates the App is not authorized to use Firebase
+            Authentication with the provided API Key. Go to the Google API Console and check under
+            the credentials tab that the API key you are using has your application’s bundle ID
+            whitelisted.
+        - FIRAuthErrorCodeKeychainError - Indicates an error occurred while accessing the keychain.
+            The NSLocalizedFailureReasonErrorKey and NSUnderlyingErrorKey fields in the
+            NSError.userInfo dictionary will contain more information about the error encountered.
+        - FIRAuthErrorCodeInternalError - Indicates an internal error occurred. Please report the
+            error back to us with the entire NSError object.
+    @remarks Common error codes for FIRUser operations:
+        - FIRAuthErrorCodeInvalidUserToken - Indicates that the signed-in user's refresh token,
+            that holds session information, is invalid. You must prompt the user to sign in again
+            on this device.
+        - FIRAuthErrorCodeUserDisabled - Indicates the user's account is disabled and can no longer
+            be used until enabled again from within the Users panel in the Firebase console.
+ */
+@interface FIRAuthErrors
+
+/** @var FIRAuthErrorDomain
+    @brief The Firebase Auth error domain.
+ */
+extern NSString *const FIRAuthErrorDomain;
+
+/** @var FIRAuthErrorNameKey
+    @brief The name of the key for the "error_name" string in the NSError userinfo dictionary.
+ */
+extern NSString *const FIRAuthErrorNameKey;
+
+/** @enum FIRAuthErrorCode
+    @brief Error codes used by Firebase Auth.
+ */
+typedef NS_ENUM(NSInteger, FIRAuthErrorCode) {
+    /** Indicates a validation error with the custom token.
+     */
+    FIRAuthErrorCodeInvalidCustomToken = 17000,
+
+    /** Indicates the service account and the API key belong to different projects.
+     */
+    FIRAuthErrorCodeCustomTokenMismatch = 17002,
+
+    /** Indicates the IDP token or requestUri is invalid.
+     */
+    FIRAuthErrorCodeInvalidCredential = 17004,
+
+    /** Indicates the user's account is disabled on the server.
+     */
+    FIRAuthErrorCodeUserDisabled = 17005,
+
+    /** Indicates the administrator disabled sign in with the specified identity provider.
+     */
+    FIRAuthErrorCodeOperationNotAllowed = 17006,
+
+    /** Indicates the email used to attempt a sign up is already in use.
+     */
+    FIRAuthErrorCodeEmailAlreadyInUse = 17007,
+
+    /** Indicates the email is invalid.
+     */
+    FIRAuthErrorCodeInvalidEmail = 17008,
+
+    /** Indicates the user attempted sign in with a wrong password.
+     */
+    FIRAuthErrorCodeWrongPassword = 17009,
+
+    /** Indicates that too many requests were made to a server method.
+     */
+    FIRAuthErrorCodeTooManyRequests = 17010,
+
+    /** Indicates the user account was not found.
+     */
+    FIRAuthErrorCodeUserNotFound = 17011,
+
+    /** Indicates account linking is required.
+     */
+    FIRAuthErrorCodeAccountExistsWithDifferentCredential = 17012,
+
+    /** Same enum as @c FIRAuthErrorCodeAccountExistsWithDifferentCredential ,
+        but with incorrect spelling. Only exists for backwards compatiblity.
+     */
+    FIRAuthErrrorCodeAccountExistsWithDifferentCredential = 17012,
+
+    /** Indicates the user has attemped to change email or password more than 5 minutes after
+        signing in.
+     */
+    FIRAuthErrorCodeRequiresRecentLogin = 17014,
+
+    /** Indicates an attempt to link a provider to which the account is already linked.
+     */
+    FIRAuthErrorCodeProviderAlreadyLinked = 17015,
+
+    /** Indicates an attempt to unlink a provider that is not linked.
+     */
+    FIRAuthErrorCodeNoSuchProvider = 17016,
+
+    /** Indicates user's saved auth credential is invalid, the user needs to sign in again.
+     */
+    FIRAuthErrorCodeInvalidUserToken = 17017,
+
+    /** Indicates a network error occurred (such as a timeout, interrupted connection, or
+        unreachable host). These types of errors are often recoverable with a retry. The @c
+        NSUnderlyingError field in the @c NSError.userInfo dictionary will contain the error
+        encountered.
+     */
+    FIRAuthErrorCodeNetworkError = 17020,
+
+    /** Indicates the saved token has expired, for example, the user may have changed account
+        password on another device. The user needs to sign in again on the device that made this
+        request.
+     */
+    FIRAuthErrorCodeUserTokenExpired = 17021,
+
+    /** Indicates an invalid API key was supplied in the request.
+     */
+    FIRAuthErrorCodeInvalidAPIKey = 17023,
+
+    /** Indicates that an attempt was made to reauthenticate with a user which is not the current
+        user.
+     */
+    FIRAuthErrorCodeUserMismatch = 17024,
+
+    /** Indicates an attempt to link with a credential that has already been linked with a
+        different Firebase account
+     */
+    FIRAuthErrorCodeCredentialAlreadyInUse = 17025,
+
+    /** Indicates an attempt to set a password that is considered too weak.
+     */
+    FIRAuthErrorCodeWeakPassword = 17026,
+
+    /** Indicates the App is not authorized to use Firebase Authentication with the
+        provided API Key.
+     */
+    FIRAuthErrorCodeAppNotAuthorized = 17028,
+
+    /** Indicates an error occurred while attempting to access the keychain.
+     */
+    FIRAuthErrorCodeKeychainError = 17995,
+
+    /** Indicates an internal error occurred.
+     */
+    FIRAuthErrorCodeInternalError = 17999,
+};
+
+@end
diff --git a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIREmailPasswordAuthProvider.h b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIREmailPasswordAuthProvider.h
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIREmailPasswordAuthProvider.h
rename to Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIREmailPasswordAuthProvider.h
diff --git a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRFacebookAuthProvider.h b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRFacebookAuthProvider.h
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRFacebookAuthProvider.h
rename to Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRFacebookAuthProvider.h
diff --git a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRGitHubAuthProvider.h b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRGitHubAuthProvider.h
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRGitHubAuthProvider.h
rename to Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRGitHubAuthProvider.h
diff --git a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRGoogleAuthProvider.h b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRGoogleAuthProvider.h
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRGoogleAuthProvider.h
rename to Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRGoogleAuthProvider.h
diff --git a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRTwitterAuthProvider.h b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRTwitterAuthProvider.h
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRTwitterAuthProvider.h
rename to Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRTwitterAuthProvider.h
diff --git a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRUser.h b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRUser.h
old mode 100644
new mode 100755
similarity index 63%
rename from Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRUser.h
rename to Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRUser.h
index 92ffb02..e03d044
--- a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRUser.h
+++ b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRUser.h
@@ -79,9 +79,15 @@ typedef void (^FIRSendEmailVerificationCallback)(NSError *_Nullable error);
     @param email The email address for the user.
     @param completion Optionally; the block invoked when the user profile change has finished.
         Invoked asynchronously on the main thread in the future.
-    @remarks May fail with a @c FIRAuthErrorCodeCredentialTooOld error code. In this case you should
-        call @c FIRUser.reauthenticateWithCredential:completion: before re-invoking
-        @c FIRUser.updateEmail:completion:.
+    @remarks Possible error codes:
+        - @c FIRAuthErrorCodeEmailAlreadyInUse - Indicates the email is already in use by another
+            account.
+        - @c FIRAuthErrorCodeInvalidEmail - Indicates the email address is malformed.
+        - @c FIRAuthErrorCodeRequiresRecentLogin - Updating a user’s email is a security sensitive
+            operation that requires a recent login from the user. This error indicates the user has
+            not signed in recently enough. To resolve, reauthenticate the user by invoking
+            reauthenticateWithCredential:completion: on FIRUser.
+        - See @c FIRAuthErrors for a list of error codes that are common to all FIRUser operations.
  */
 - (void)updateEmail:(NSString *)email completion:(nullable FIRUserProfileChangeCallback)completion;
 
@@ -90,9 +96,17 @@ typedef void (^FIRSendEmailVerificationCallback)(NSError *_Nullable error);
     @param password The new password for the user.
     @param completion Optionally; the block invoked when the user profile change has finished.
         Invoked asynchronously on the main thread in the future.
-    @remarks May fail with a @c FIRAuthErrorCodeCredentialTooOld error code. In this case you should
-        call @c FIRUser.reauthenticateWithCredential:completion: before re-invoking
-        @c FIRUser.updateEmail:completion:.
+    @remarks Possible error codes:
+        - @c FIRAuthErrorCodeOperationNotAllowed - Indicates the administrator disabled sign in with
+            the specified identity provider.
+        - @c FIRAuthErrorCodeRequiresRecentLogin - Updating a user’s password is a security
+            sensitive operation that requires a recent login from the user. This error indicates the
+            user has not signed in recently enough. To resolve, reauthenticate the user by invoking
+            reauthenticateWithCredential:completion: on FIRUser.
+        - @c FIRAuthErrorCodeWeakPassword - Indicates an attempt to set a password that is
+            considered too weak. The NSLocalizedFailureReasonErrorKey field in the NSError.userInfo
+            dictionary object will contain more detailed explanation that can be shown to the user.
+        - See @c FIRAuthErrors for a list of error codes that are common to all FIRUser operations.
  */
 - (void)updatePassword:(NSString *)password
             completion:(nullable FIRUserProfileChangeCallback)completion;
@@ -112,6 +126,8 @@ typedef void (^FIRSendEmailVerificationCallback)(NSError *_Nullable error);
     @remarks May fail with a @c FIRAuthErrorCodeCredentialTooOld error code. In this case you should
         call @c FIRUser.reauthenticateWithCredential:completion: before re-invoking
         @c FIRUser.updateEmail:completion:.
+    @remarks Possible error codes:
+        - See @c FIRAuthErrors for a list of error codes that are common to all API methods.
  */
 - (void)reloadWithCompletion:(nullable FIRUserProfileChangeCallback)completion;
 
@@ -125,6 +141,26 @@ typedef void (^FIRSendEmailVerificationCallback)(NSError *_Nullable error);
     @remarks If the user associated with the supplied credential is different from the current user,
         or if the validation of the supplied credentials fails; an error is returned and the current
         user remains signed in.
+    @remarks Possible error codes:
+        - @c FIRAuthErrorCodeInvalidCredential Indicates the supplied credential is invalid. This
+                could happen if it has expired or it is malformed.
+        - @c FIRAuthErrorCodeOperationNotAllowed Indicates that accounts with the identity provider
+            represented by the credential are not enabled. Enable them in the Auth section of the
+            Firebase console.
+        - @c FIRAuthErrorCodeEmailAlreadyInUse Indicates the email asserted by the credential
+            (e.g. the email in a Facebook access token) is already in use by an existing account,
+            that cannot be authenticated with this method. Call fetchProvidersForEmail for
+            this user’s email and then prompt them to sign in with any of the sign-in providers
+            returned. This error will only be thrown if the “One account per email address”
+            setting is enabled in the Firebase console, under Auth settings. - Please note that the
+            error code raised in this specific situation may not be the same on Web and Android.
+        - @c FIRAuthErrorCodeUserDisabled Indicates the user's account is disabled.
+        - @c FIRAuthErrorCodeWrongPassword Indicates the user attempted reauthentication with an
+            incorrect password, if credential is of the type EmailPasswordAuthCredential.
+        - @c FIRAuthErrorCodeUserMismatch Indicates that an attempt was made to reauthenticate with
+            a user which is not the current user.
+        - @c FIRAuthErrorCodeInvalidEmail - Indicates the email address is malformed.
+        - See @c FIRAuthErrors for a list of error codes that are common to all API methods.
  */
 - (void)reauthenticateWithCredential:(FIRAuthCredential *)credential
                           completion:(nullable FIRUserProfileChangeCallback)completion;
@@ -133,6 +169,8 @@ typedef void (^FIRSendEmailVerificationCallback)(NSError *_Nullable error);
     @brief Retrieves the Firebase authentication token, possibly refreshing it if it has expired.
     @param completion Optionally; the block invoked when the token is available. Invoked
         asynchronously on the main thread in the future.
+    @remarks Possible error codes:
+        - See @c FIRAuthErrors for a list of error codes that are common to all API methods.
  */
 - (void)getTokenWithCompletion:(nullable FIRAuthTokenCallback)completion;
 
@@ -144,6 +182,8 @@ typedef void (^FIRSendEmailVerificationCallback)(NSError *_Nullable error);
         asynchronously on the main thread in the future.
     @remarks The authentication token will be refreshed (by making a network request) if it has
         expired, or if @c forceRefresh is YES.
+    @remarks Possible error codes:
+        - See @c FIRAuthErrors for a list of error codes that are common to all API methods.
  */
 - (void)getTokenForcingRefresh:(BOOL)forceRefresh
                     completion:(nullable FIRAuthTokenCallback)completion;
@@ -153,6 +193,17 @@ typedef void (^FIRSendEmailVerificationCallback)(NSError *_Nullable error);
     @param credential The credential for the identity provider.
     @param completion Optionally; the block invoked when the unlinking is complete, or fails.
         Invoked asynchronously on the main thread in the future.
+    @remarks Possible error codes:
+        - @c FIRAuthErrorCodeProviderAlreadyLinked - Indicates an attempt to link a provider of a
+            type already linked to this account.
+        - @c FIRAuthErrorCodeCredentialAlreadyInUse - Indicates an attempt to link with a credential
+            that has already been linked with a different Firebase account.
+        - @c FIRAuthErrorCodeOperationNotAllowed - Indicates that accounts with the identity
+            provider represented by the credential are not enabled. Enable them in the Auth section
+            of the Firebase console.
+        - This method may also return error codes associated with updateEmail:completion: and
+            updatePassword:completion: on FIRUser.
+        - See @c FIRAuthErrors for a list of error codes that are common to all FIRUser operations.
  */
 - (void)linkWithCredential:(FIRAuthCredential *)credential
                 completion:(nullable FIRAuthResultCallback)completion;
@@ -162,6 +213,14 @@ typedef void (^FIRSendEmailVerificationCallback)(NSError *_Nullable error);
     @param provider The provider ID of the provider to unlink.
     @param completion Optionally; the block invoked when the unlinking is complete, or fails.
         Invoked asynchronously on the main thread in the future.
+    @remarks Possible error codes:
+        - @c FIRAuthErrorCodeNoSuchProvider - Indicates an attempt to unlink a provider that is not
+            linked to the account.
+        - @c FIRAuthErrorCodeRequiresRecentLogin - Updating email is a security sensitive operation
+            that requires a recent login from the user. This error indicates the user has not signed
+            in recently enough. To resolve, reauthenticate the user by invoking
+            reauthenticateWithCredential:completion: on FIRUser.
+        - See @c FIRAuthErrors for a list of error codes that are common to all FIRUser operations.
  */
 - (void)unlinkFromProvider:(NSString *)provider
                 completion:(nullable FIRAuthResultCallback)completion;
@@ -170,6 +229,9 @@ typedef void (^FIRSendEmailVerificationCallback)(NSError *_Nullable error);
     @brief Initiates email verification for the user.
     @param completion Optionally; the block invoked when the request to send an email verification
         is complete, or fails. Invoked asynchronously on the main thread in the future.
+    @remarks Possible error codes:
+        - @c FIRAuthErrorCodeUserNotFound - Indicates the user account was not found.
+        - See @c FIRAuthErrors for a list of error codes that are common to all FIRUser operations.
  */
 - (void)sendEmailVerificationWithCompletion:(nullable FIRSendEmailVerificationCallback)completion;
 
@@ -177,6 +239,12 @@ typedef void (^FIRSendEmailVerificationCallback)(NSError *_Nullable error);
     @brief Deletes the user account (also signs out the user, if this was the current user).
     @param completion Optionally; the block invoked when the request to delete the account is
         complete, or fails. Invoked asynchronously on the main thread in the future.
+    @remarks Possible error codes:
+        - @c FIRAuthErrorCodeRequiresRecentLogin - Updating email is a security sensitive operation
+            that requires a recent login from the user. This error indicates the user has not signed
+            in recently enough. To resolve, reauthenticate the user by invoking
+            reauthenticateWithCredential:completion: on FIRUser.
+        - See @c FIRAuthErrors for a list of error codes that are common to all FIRUser operations.
  */
 - (void)deleteWithCompletion:(nullable FIRUserProfileChangeCallback)completion;
 
diff --git a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRUserInfo.h b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRUserInfo.h
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FIRUserInfo.h
rename to Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FIRUserInfo.h
diff --git a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FirebaseAuth.h b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FirebaseAuth.h
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Headers/FirebaseAuth.h
rename to Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Headers/FirebaseAuth.h
diff --git a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Modules/module.modulemap b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Modules/module.modulemap
old mode 100644
new mode 100755
similarity index 89%
rename from Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Modules/module.modulemap
rename to Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Modules/module.modulemap
index 8064a48..40ecb99
--- a/Example/Pods/FirebaseAuth/Frameworks/FirebaseAuth.framework/Modules/module.modulemap
+++ b/Example/Pods/FirebaseAuth/Frameworks/frameworks/FirebaseAuth.framework/Modules/module.modulemap
@@ -2,7 +2,6 @@ framework module FirebaseAuth {
   umbrella header "FirebaseAuth.h"
 
   export *
-  module * {export * }
 
   header "FIRAuth.h"
   header "FIRAuthCredential.h"
@@ -18,4 +17,6 @@ framework module FirebaseAuth {
   link framework "Security"
 
   use FirebaseAnalytics
+  use GoogleToolboxForMac
+  use GTMSessionFetcher
 }
diff --git a/Example/Pods/FirebaseAuth/README.md b/Example/Pods/FirebaseAuth/README.md
old mode 100644
new mode 100755
diff --git a/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/FirebaseCore b/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/FirebaseCore
new file mode 100755
index 0000000..13d978b
Binary files /dev/null and b/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/FirebaseCore differ
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRAnalyticsConfiguration.h b/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Headers/FIRAnalyticsConfiguration.h
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRAnalyticsConfiguration.h
rename to Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Headers/FIRAnalyticsConfiguration.h
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRApp.h b/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Headers/FIRApp.h
old mode 100644
new mode 100755
similarity index 76%
rename from Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRApp.h
rename to Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Headers/FIRApp.h
index 6b65776..6c27e45
--- a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIRApp.h
+++ b/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Headers/FIRApp.h
@@ -5,6 +5,7 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
+/** A block that takes a BOOL and has no return value. */
 typedef void (^FIRAppVoidBoolCallback)(BOOL success);
 
 /**
@@ -12,6 +13,15 @@ typedef void (^FIRAppVoidBoolCallback)(BOOL success);
  *
  * Initialize and configure FIRApp using [FIRApp configure];
  * Or other customized ways as shown below.
+ *
+ * The logging system has two modes: default mode and debug mode. In default mode, only logs with
+ * log level Notice, Warning and Error will be sent to device. In debug mode, all logs will be sent
+ * to device. The log levels that Firebase uses are consistent with the ASL log levels.
+ *
+ * Enable debug mode by passing the -FIRDebugEnabled argument to the application. You can add this
+ * argument in the application's Xcode scheme. When debug mode is enabled via -FIRDebugEnabled,
+ * further executions of the application will also be in debug mode. In order to return to default
+ * mode, you must explicitly disable the debug mode with the application argument -FIRDebugDisabled.
  */
 @interface FIRApp : NSObject
 
@@ -68,7 +78,7 @@ typedef void (^FIRAppVoidBoolCallback)(BOOL success);
  * FIRFirebaseApp instances should not be initialized directly. Call |FIRApp configure|, or
  * |FIRApp configureWithOptions:|, or |FIRApp configureWithNames:options| directly.
  */
-- (nullable instancetype)init NS_UNAVAILABLE;
+- (instancetype)init NS_UNAVAILABLE;
 
 /**
  * Gets the name of this app.
diff --git a/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Headers/FIRConfiguration.h b/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Headers/FIRConfiguration.h
new file mode 100755
index 0000000..0b47e65
--- /dev/null
+++ b/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Headers/FIRConfiguration.h
@@ -0,0 +1,40 @@
+#import <Foundation/Foundation.h>
+
+#import "FIRAnalyticsConfiguration.h"
+
+/**
+ * The log levels used by FIRConfiguration.
+ */
+typedef NS_ENUM(NSInteger, FIRLogLevel) {
+  /** Error */
+  kFIRLogLevelError __deprecated = 0,
+  /** Warning */
+  kFIRLogLevelWarning __deprecated,
+  /** Info */
+  kFIRLogLevelInfo __deprecated,
+  /** Debug */
+  kFIRLogLevelDebug __deprecated,
+  /** Assert */
+  kFIRLogLevelAssert __deprecated,
+  /** Max */
+  kFIRLogLevelMax __deprecated = kFIRLogLevelAssert
+} DEPRECATED_MSG_ATTRIBUTE(
+    "Use -FIRDebugEnabled and -FIRDebugDisabled. See FIRApp.h for more details.");
+
+/**
+ * This interface provides global level properties that the developer can tweak, and the singleton
+ * of the Firebase Analytics configuration class.
+ */
+@interface FIRConfiguration : NSObject
+
+/** Returns the shared configuration object. */
++ (FIRConfiguration *)sharedInstance;
+
+/** The configuration class for Firebase Analytics. */
+@property(nonatomic, readwrite) FIRAnalyticsConfiguration *analyticsConfiguration;
+
+/** Global log level. Defaults to kFIRLogLevelError. */
+@property(nonatomic, readwrite, assign) FIRLogLevel logLevel DEPRECATED_MSG_ATTRIBUTE(
+    "Use -FIRDebugEnabled and -FIRDebugDisabled. See FIRApp.h for more details.");
+
+@end
diff --git a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIROptions.h b/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Headers/FIROptions.h
old mode 100644
new mode 100755
similarity index 85%
rename from Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIROptions.h
rename to Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Headers/FIROptions.h
index 82418f6..5ab20c6
--- a/Example/Pods/FirebaseAnalytics/Frameworks/FirebaseAnalytics.framework/Headers/FIROptions.h
+++ b/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Headers/FIROptions.h
@@ -74,4 +74,14 @@
                       storageBucket:(NSString *)storageBucket
                   deepLinkURLScheme:(NSString *)deepLinkURLScheme;
 
+/**
+ * Initializes a customized instance of FIROptions from the file at the given plist file path.
+ * For example,
+ * NSString *filePath =
+ *     [[NSBundle mainBundle] pathForResource:@"GoogleService-Info" ofType:@"plist"];
+ * FIROptions *options = [[FIROptions alloc] initWithContentsOfFile:filePath];
+ * Returns nil if the plist file does not exist or is invalid.
+ */
+- (instancetype)initWithContentsOfFile:(NSString *)plistPath;
+
 @end
diff --git a/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Headers/FirebaseCore.h b/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Headers/FirebaseCore.h
new file mode 100755
index 0000000..d144758
--- /dev/null
+++ b/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Headers/FirebaseCore.h
@@ -0,0 +1,6 @@
+// Generated umbrella header for FirebaseCore.
+
+#import "FIRAnalyticsConfiguration.h"
+#import "FIRApp.h"
+#import "FIRConfiguration.h"
+#import "FIROptions.h"
diff --git a/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Modules/module.modulemap b/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Modules/module.modulemap
new file mode 100755
index 0000000..82d14eb
--- /dev/null
+++ b/Example/Pods/FirebaseCore/Frameworks/frameworks/FirebaseCore.framework/Modules/module.modulemap
@@ -0,0 +1,15 @@
+framework module FirebaseCore {
+
+  export *
+
+  umbrella header "FirebaseCore.h"
+
+  header "FIRAnalyticsConfiguration.h"
+  header "FIRApp.h"
+  header "FIRConfiguration.h"
+  header "FIROptions.h"
+
+  link framework "SystemConfiguration"
+
+  link "c++"
+}
diff --git a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/FirebaseDatabase b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/FirebaseDatabase
index 19ce33c..5b741e6 100755
Binary files a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/FirebaseDatabase and b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/FirebaseDatabase differ
diff --git a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDataEventType.h b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDataEventType.h
index d940f9b..245fd2d 100755
--- a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDataEventType.h
+++ b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDataEventType.h
@@ -33,11 +33,16 @@
  * This enum is the set of events that you can observe at a Firebase Database location.
  */
 typedef NS_ENUM(NSInteger, FIRDataEventType) {
-    FIRDataEventTypeChildAdded,    // 0, fired when a new child node is added to a location
-    FIRDataEventTypeChildRemoved,  // 1, fired when a child node is removed from a location
-    FIRDataEventTypeChildChanged,  // 2, fired when a child node at a location changes
-    FIRDataEventTypeChildMoved,    // 3, fired when a child node moves relative to the other child nodes at a location
-    FIRDataEventTypeValue          // 4, fired when any data changes at a location and, recursively, any children
+    /// A new child node is added to a location.
+    FIRDataEventTypeChildAdded,
+    /// A child node is removed from a location.
+    FIRDataEventTypeChildRemoved,
+    /// A child node at a location changes.
+    FIRDataEventTypeChildChanged,
+    /// A child node moves relative to the other child nodes at a location.
+    FIRDataEventTypeChildMoved,
+    /// Any data changes at a location or, recursively, at any child node.
+    FIRDataEventTypeValue
 };
 
 #endif
diff --git a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDataSnapshot.h b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDataSnapshot.h
index a748c92..5890dd4 100755
--- a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDataSnapshot.h
+++ b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDataSnapshot.h
@@ -44,10 +44,10 @@ NS_ASSUME_NONNULL_BEGIN
 @interface FIRDataSnapshot : NSObject
 
 
-/** @name Navigating and inspecting a snapshot */
+#pragma mark - Navigating and inspecting a snapshot
 
 /**
- * Get a FIRDataSnapshot for the location at the specified relative path.
+ * Gets a FIRDataSnapshot for the location at the specified relative path.
  * The relative path can either be a simple child key (e.g. 'fred') 
  * or a deeper slash-separated path (e.g. 'fred/name/first'). If the child
  * location has no data, an empty FIRDataSnapshot is returned.
@@ -62,7 +62,7 @@ NS_ASSUME_NONNULL_BEGIN
  * Return YES if the specified child exists.
  *
  * @param childPathString A relative path to the location of a potential child.
- * @return YES if data exists at the specified childPathString, else false.
+ * @return YES if data exists at the specified childPathString, else NO.
  */
 - (BOOL) hasChild:(NSString *)childPathString;
 
@@ -78,12 +78,12 @@ NS_ASSUME_NONNULL_BEGIN
 /**
  * Return YES if the DataSnapshot contains a non-null value.
  *
- * @return YES if this snapshot contains a non-null value, otherwise NO.
+ * @return YES if this snapshot contains a non-null value, else NO.
  */
 - (BOOL) exists;
 
 
-/** @name Data export */
+#pragma mark - Data export
 
 /**
  * Returns the raw value at this location, coupled with any metadata, such as priority.
@@ -94,16 +94,16 @@ NS_ASSUME_NONNULL_BEGIN
 - (id __nullable) valueInExportFormat;
 
 
-/** @name Properties */
+#pragma mark - Properties
 
 /**
  * Returns the contents of this data snapshot as native types.
  *
  * Data types returned:
- * * NSDictionary
- * * NSArray
- * * NSNumber (also includes booleans)
- * * NSString
+ * + NSDictionary
+ * + NSArray
+ * + NSNumber (also includes booleans)
+ * + NSString
  *
  * @return The data as a native object.
  */
@@ -111,7 +111,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 
 /**
- * Get the number of children for this DataSnapshot.
+ * Gets the number of children for this DataSnapshot.
  *
  * @return An integer indicating the number of children.
  */
@@ -119,9 +119,9 @@ NS_ASSUME_NONNULL_BEGIN
 
 
 /**
- * Get a FIRDatabaseReference for the location that this data came from
+ * Gets a FIRDatabaseReference for the location that this data came from.
  *
- * @return A FIRDatabaseReference instance for the location of this data
+ * @return A FIRDatabaseReference instance for the location of this data.
  */
 @property (nonatomic, readonly, strong) FIRDatabaseReference * ref;
 
@@ -142,7 +142,7 @@ NS_ASSUME_NONNULL_BEGIN
  *     ...
  * }
  *
- * @return An NSEnumerator of the children
+ * @return An NSEnumerator of the children.
  */
 @property (strong, readonly, nonatomic) NSEnumerator* children;
 
diff --git a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDatabase.h b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDatabase.h
index fece3e6..237d52d 100755
--- a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDatabase.h
+++ b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDatabase.h
@@ -117,6 +117,17 @@ NS_ASSUME_NONNULL_BEGIN
  */
 @property (nonatomic) BOOL persistenceEnabled;
 
+/**
+ * By default the Firebase Database client will use up to 10MB of disk space to cache data. If the cache grows beyond
+ * this size, the client will start removing data that hasn't been recently used. If you find that your application
+ * caches too little or too much data, call this method to change the cache size. This property must be set before
+ * creating your first FIRDatabaseReference and only needs to be called once per application.
+ *
+ * Note that the specified cache size is only an approximation and the size on disk may temporarily exceed it
+ * at times. Cache sizes smaller than 1 MB or greater than 100 MB are not supported.
+ */
+@property (nonatomic) NSUInteger persistenceCacheSizeBytes;
+
 /**
  * Sets the dispatch queue on which all events are raised. The default queue is the main queue.
  *
@@ -126,6 +137,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 /**
  * Enables verbose diagnostic logging.
+ *
  * @param enabled YES to enable logging, NO to disable.
  */
 + (void) setLoggingEnabled:(BOOL)enabled;
diff --git a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDatabaseQuery.h b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDatabaseQuery.h
index 53b5254..3eb8d9f 100755
--- a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDatabaseQuery.h
+++ b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDatabaseQuery.h
@@ -32,11 +32,16 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
+/**
+ * A FIRDatabaseHandle is used to identify listeners of Firebase Database events. These handles
+ * are returned by observeEventType: and and can later be passed to removeObserverWithHandle: to
+ * stop receiving updates.
+ */
 typedef NSUInteger FIRDatabaseHandle;
 
 /**
  * A FIRDatabaseQuery instance represents a query over the data at a particular location.
- * 
+ *
  * You create one by calling one of the query methods (queryOrderedByChild:, queryStartingAtValue:, etc.)
  * on a FIRDatabaseReference. The query methods can be chained to further specify the data you are interested in
  * observing
@@ -44,7 +49,7 @@ typedef NSUInteger FIRDatabaseHandle;
 @interface FIRDatabaseQuery : NSObject
 
 
-/** @name Attaching observers to read data */
+#pragma mark - Attach observers to read data
 
 /**
  * observeEventType:withBlock: is used to listen for data changes at a particular location.
@@ -52,6 +57,7 @@ typedef NSUInteger FIRDatabaseHandle;
  * for the initial data and again whenever the data changes.
  *
  * Use removeObserverWithHandle: to stop receiving updates.
+ *
  * @param eventType The type of event to listen for.
  * @param block The block that should be called with initial data and updates.  It is passed the data as a FIRDataSnapshot.
  * @return A handle used to unregister this block later using removeObserverWithHandle:
@@ -154,7 +160,8 @@ typedef NSUInteger FIRDatabaseHandle;
  */
 - (void)observeSingleEventOfType:(FIRDataEventType)eventType andPreviousSiblingKeyWithBlock:(void (^)(FIRDataSnapshot *snapshot, NSString *__nullable prevKey))block withCancelBlock:(nullable void (^)(NSError* error))cancelBlock;
 
-/** @name Detaching observers */
+
+#pragma mark - Detaching observers
 
 /**
  * Detach a block previously attached with observeEventType:withBlock:.
@@ -179,8 +186,7 @@ typedef NSUInteger FIRDatabaseHandle;
  - (void) keepSynced:(BOOL)keepSynced;
 
 
-/** @name Querying and limiting */
-
+#pragma mark - Querying and limiting
 
 /**
 * queryLimitedToFirst: is used to generate a reference to a limited view of the data at this location.
@@ -202,10 +208,10 @@ typedef NSUInteger FIRDatabaseHandle;
 - (FIRDatabaseQuery *)queryLimitedToLast:(NSUInteger)limit;
 
 /**
-* queryOrderBy: is used to generate a reference to a view of the data that's been sorted by the values of
-* a particular child key. This method is intended to be used in combination with queryStartingAtValue:,
-* queryEndingAtValue:, or queryEqualToValue:.
-*
+ * queryOrderBy: is used to generate a reference to a view of the data that's been sorted by the values of
+ * a particular child key. This method is intended to be used in combination with queryStartingAtValue:,
+ * queryEndingAtValue:, or queryEqualToValue:.
+ *
  * @param key The child key to use in ordering data visible to the returned FIRDatabaseQuery
  * @return A FIRDatabaseQuery instance, ordered by the values of the specified child key.
 */
@@ -303,11 +309,10 @@ typedef NSUInteger FIRDatabaseHandle;
 - (FIRDatabaseQuery *)queryEqualToValue:(nullable id)value childKey:(nullable NSString *)childKey;
 
 
-/** @name Properties */
-
+#pragma mark - Properties
 
 /**
-* Get a FIRDatabaseReference for the location of this query.
+* Gets a FIRDatabaseReference for the location of this query.
 *
 * @return A FIRDatabaseReference for the location of this query.
 */
diff --git a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDatabaseReference.h b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDatabaseReference.h
index ef5e9ae..62bb594 100755
--- a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDatabaseReference.h
+++ b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRDatabaseReference.h
@@ -44,17 +44,17 @@ NS_ASSUME_NONNULL_BEGIN
  * and can be used for reading or writing data to that Firebase Database location.
  *
  * This class is the starting point for all Firebase Database operations. After you've
- * initialized it with initWithUrl: you can use it
- * to read data (ie. observeEventType:withBlock:), write data (ie. setValue:), and to create new
- * FIRDatabaseReferences (ie. child:).
+ * obtained your first FIRDatabaseReference via [FIRDatabase reference], you can use it
+ * to read data (ie. observeEventType:withBlock:), write data (ie. setValue:), and to
+ * create new FIRDatabaseReferences (ie. child:).
  */
 @interface FIRDatabaseReference : FIRDatabaseQuery
 
 
-/** @name Getting references to children locations */
+#pragma mark - Getting references to children locations
 
 /**
- * Get a FIRDatabaseReference for the location at the specified relative path.
+ * Gets a FIRDatabaseReference for the location at the specified relative path.
  * The relative path can either be a simple child key (e.g. 'fred') or a
  * deeper slash-separated path (e.g. 'fred/name/first').
  *
@@ -81,9 +81,9 @@ NS_ASSUME_NONNULL_BEGIN
 - (FIRDatabaseReference *) childByAutoId;
 
 
-/** @name Writing data */
+#pragma mark - Writing data
 
-/*!  Write data to this Firebase Database location.
+/** Write data to this Firebase Database location.
 
 This will overwrite any data at this location and all child locations. 
  
@@ -161,7 +161,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
 - (void) removeValueWithCompletionBlock:(void (^)(NSError *__nullable error, FIRDatabaseReference * ref))block;
 
 /**
- * Set a priority for the data at this Firebase Database location.
+ * Sets a priority for the data at this Firebase Database location.
  * Priorities can be used to provide a custom ordering for the children at a location
  * (if no priorities are specified, the children are ordered by key).
  *
@@ -187,7 +187,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
 
 
 /**
- * The same as setPriority: with a block block that is called once the priority has
+ * The same as setPriority: with a block that is called once the priority has
  * been committed to the Firebase Database servers.
  *
  * @param priority The priority to set at the specified location.
@@ -196,7 +196,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
 - (void) setPriority:(nullable id)priority withCompletionBlock:(void (^)(NSError *__nullable error, FIRDatabaseReference * ref))block;
 
 /**
- * Update changes the values at the specified paths in the dictionary without overwriting other
+ * Updates the values at the specified paths in the dictionary without overwriting other
  * keys at this location.
  *
  * @param values A dictionary of the keys to change and their new values
@@ -204,7 +204,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
 - (void) updateChildValues:(NSDictionary *)values;
 
 /**
- * The same as update: with a block block that is called once the update has been committed to the 
+ * The same as update: with a block that is called once the update has been committed to the 
  * Firebase Database servers
  *
  * @param values A dictionary of the keys to change and their new values
@@ -213,7 +213,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
 - (void) updateChildValues:(NSDictionary *)values withCompletionBlock:(void (^)(NSError *__nullable error, FIRDatabaseReference * ref))block;
 
 
-/** @name Attaching observers to read data */
+#pragma mark - Attaching observers to read data
 
 /**
  * observeEventType:withBlock: is used to listen for data changes at a particular location.
@@ -323,7 +323,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
  */
 - (void)observeSingleEventOfType:(FIRDataEventType)eventType andPreviousSiblingKeyWithBlock:(void (^)(FIRDataSnapshot *snapshot, NSString *__nullable prevKey))block withCancelBlock:(nullable void (^)(NSError* error))cancelBlock;
 
-/** @name Detaching observers */
+#pragma mark - Detaching observers
 
 /**
  * Detach a block previously attached with observeEventType:withBlock:.
@@ -343,12 +343,12 @@ is meant to be preserved, you should use setValue:andPriority: instead.
 
 
 /**
- * Calling removeAllObservers does not remove any observers at child references.
+ * Removes all observers at the current reference, but does not remove any observers at child references.
  * removeAllObservers must be called again for each child reference where a listener was established to remove the observers.
  */
 - (void) removeAllObservers;
 
-/** @name Querying and limiting */
+#pragma mark - Querying and limiting
 
 
 /**
@@ -462,7 +462,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
  */
 - (FIRDatabaseQuery *)queryEqualToValue:(nullable id)value childKey:(nullable NSString *)childKey;
 
-/** @name Managing presence */
+#pragma mark - Managing presence
 
 /**
  * Ensure the data at this location is set to the specified value when
@@ -580,7 +580,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
 - (void) cancelDisconnectOperationsWithCompletionBlock:(nullable void (^)(NSError *__nullable error, FIRDatabaseReference * ref))block;
 
 
-/** @name Manual Connection Management */
+#pragma mark - Manual Connection Management
 
 /**
  * Manually disconnect the Firebase Database client from the server and disable automatic reconnection.
@@ -622,7 +622,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
 + (void) goOnline;
 
 
-/** @name Transactions */
+#pragma mark - Transactions
 
 /**
  * Performs an optimistic-concurrency transactional update to the data at this location. Your block will be called with a FIRMutableData
@@ -632,7 +632,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
  * If, when the operation reaches the server, it turns out that this client had stale data, your block will be run
  * again with the latest data from the server.
  *
- * When your block is run, you may decide to abort the transaction by return [FIRTransactionResult abort].
+ * When your block is run, you may decide to abort the transaction by returning [FIRTransactionResult abort].
  *
  * @param block This block receives the current data at this location and must return an instance of FIRTransactionResult
  */
@@ -647,7 +647,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
  * If, when the operation reaches the server, it turns out that this client had stale data, your block will be run
  * again with the latest data from the server.
  *
- * When your block is run, you may decide to abort the transaction by return [FIRTransactionResult abort].
+ * When your block is run, you may decide to abort the transaction by returning [FIRTransactionResult abort].
  *
  * @param block This block receives the current data at this location and must return an instance of FIRTransactionResult
  * @param completionBlock This block will be triggered once the transaction is complete, whether it was successful or not. It will indicate if there was an error, whether or not the data was committed, and what the current value of the data at this location is.
@@ -675,7 +675,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
 - (void)runTransactionBlock:(FIRTransactionResult * (^) (FIRMutableData* currentData))block andCompletionBlock:(nullable void (^) (NSError *__nullable error, BOOL committed, FIRDataSnapshot *__nullable snapshot))completionBlock withLocalEvents:(BOOL)localEvents;
 
 
-/** @name Retrieving String Representation */
+#pragma mark - Retrieving String Representation
 
 /**
  * Gets the absolute URL of this Firebase Database location.
@@ -684,10 +684,10 @@ is meant to be preserved, you should use setValue:andPriority: instead.
  */
 - (NSString *) description;
 
-/** @name Properties */
+#pragma mark - Properties
 
 /**
- * Get a FIRDatabaseReference for the parent location.
+ * Gets a FIRDatabaseReference for the parent location.
  * If this instance refers to the root of your Firebase Database, it has no parent,
  * and therefore parent( ) will return null.
  *
@@ -697,7 +697,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
 
 
 /**
- * Get a FIRDatabaseReference for the root location
+ * Gets a FIRDatabaseReference for the root location
  *
  * @return A new FIRDatabaseReference to root location.
  */
@@ -705,7 +705,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
 
 
 /**
- * Gets last token in a Firebase Database location (e.g. 'fred' in https://SampleChat.firebaseIO-demo.com/users/fred)
+ * Gets the last token in a Firebase Database location (e.g. 'fred' in https://SampleChat.firebaseIO-demo.com/users/fred)
  *
  * @return The key of the location this reference points to.
  */
diff --git a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRMutableData.h b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRMutableData.h
index 022c442..fc42ec9 100755
--- a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRMutableData.h
+++ b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Headers/FIRMutableData.h
@@ -37,18 +37,19 @@ NS_ASSUME_NONNULL_BEGIN
  * you wish to save at that location, and then returning using [FIRTransactionResult successWithValue:].
  *
  * To modify the data, set its value property to any of the native types support by Firebase Database:
- * * NSNumber (includes BOOL)
- * * NSDictionary
- * * NSArray
- * * NSString
- * * nil / NSNull to remove the data
+ *
+ * + NSNumber (includes BOOL)
+ * + NSDictionary
+ * + NSArray
+ * + NSString
+ * + nil / NSNull to remove the data
  *
  * Note that changes made to a child FIRMutableData instance will be visible to the parent.
  */
 @interface FIRMutableData : NSObject
 
 
-/** @name Inspecting and navigating the data */
+#pragma mark - Inspecting and navigating the data
 
 
 /**
@@ -78,19 +79,19 @@ NS_ASSUME_NONNULL_BEGIN
 - (FIRMutableData *)childDataByAppendingPath:(NSString *)path;
 
 
-/** @name Properties */
+#pragma mark - Properties
 
 
 /**
- * To modify the data contained by this instance of FIRMutableData, set this to any of the native types support by Firebase Database:
+ * To modify the data contained by this instance of FIRMutableData, set this to any of the native types supported by Firebase Database:
  *
- * * NSNumber (includes BOOL)
- * * NSDictionary
- * * NSArray
- * * NSString
- * * nil / NSNull to remove the data
+ * + NSNumber (includes BOOL)
+ * + NSDictionary
+ * + NSArray
+ * + NSString
+ * + nil / NSNull to remove the data
  *
- * Note that setting the value will override the priority at this location.
+ * Note that setting this value will override the priority at this location.
  *
  * @return The current data at this location as a native object
  */
@@ -100,9 +101,9 @@ NS_ASSUME_NONNULL_BEGIN
 /**
  * Set this property to update the priority of the data at this location. Can be set to the following types:
  *
- * * NSNumber
- * * NSString
- * * nil / NSNull to remove the priority
+ * + NSNumber
+ * + NSString
+ * + nil / NSNull to remove the priority
  *
  * @return The priority of the data at this location
  */
diff --git a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Info.plist b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Info.plist
index 6a80a72..02462c9 100755
Binary files a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Info.plist and b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Info.plist differ
diff --git a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Modules/module.modulemap b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Modules/module.modulemap
index 594091b..28b323e 100755
--- a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Modules/module.modulemap
+++ b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/Modules/module.modulemap
@@ -3,4 +3,11 @@ framework module FirebaseDatabase {
 
   export *
   module * { export * }
+
+  link framework "CFNetwork"
+  link framework "Security"
+  link framework "SystemConfiguration"
+
+  link "c++"
+  link "icucore"
 }
diff --git a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/_CodeSignature/CodeDirectory b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/_CodeSignature/CodeDirectory
new file mode 100755
index 0000000..6216fb2
Binary files /dev/null and b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/_CodeSignature/CodeDirectory differ
diff --git a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/_CodeSignature/CodeRequirements b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/_CodeSignature/CodeRequirements
new file mode 100755
index 0000000..dbf9d61
Binary files /dev/null and b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/_CodeSignature/CodeRequirements differ
diff --git a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/_CodeSignature/CodeRequirements-1 b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/_CodeSignature/CodeRequirements-1
new file mode 100755
index 0000000..f0bffa2
Binary files /dev/null and b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/_CodeSignature/CodeRequirements-1 differ
diff --git a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/_CodeSignature/CodeResources b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/_CodeSignature/CodeResources
new file mode 100755
index 0000000..5ba173c
--- /dev/null
+++ b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/_CodeSignature/CodeResources
@@ -0,0 +1,261 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>files</key>
+	<dict>
+		<key>Headers/FIRDataEventType.h</key>
+		<data>
+		IHUoTDesNrrqRazMzENekLgwQlU=
+		</data>
+		<key>Headers/FIRDataSnapshot.h</key>
+		<data>
+		Xl7BW2qYfWUtYIwmj/CjAX/asL8=
+		</data>
+		<key>Headers/FIRDatabase.h</key>
+		<data>
+		LqOSlmZ5GCnw9jqvq23UOIqZbwg=
+		</data>
+		<key>Headers/FIRDatabaseQuery.h</key>
+		<data>
+		IXu4nAJzWixfRyJ/DFZ7bkO9PpU=
+		</data>
+		<key>Headers/FIRDatabaseReference.h</key>
+		<data>
+		aUPNeHv+7QXU77WvkkzLBflL434=
+		</data>
+		<key>Headers/FIRMutableData.h</key>
+		<data>
+		vJqxTHBgwCxt7s+laGQwZxr+ghU=
+		</data>
+		<key>Headers/FIRServerValue.h</key>
+		<data>
+		VulktzkncL3JZO9la/gruOa9LMo=
+		</data>
+		<key>Headers/FIRTransactionResult.h</key>
+		<data>
+		AKeMk8H7NeWIQ5v7f3CZeLTP6q4=
+		</data>
+		<key>Headers/FirebaseDatabase.h</key>
+		<data>
+		WzB+Hgl8mCR/GcXAOGW5mT4tGpM=
+		</data>
+		<key>Info.plist</key>
+		<data>
+		/7mhRl81aNoup+1ixRpfNLHopCQ=
+		</data>
+		<key>Modules/module.modulemap</key>
+		<data>
+		JsRm4MDrfOXF74fpRlVXodMbvRg=
+		</data>
+	</dict>
+	<key>files2</key>
+	<dict>
+		<key>Headers/FIRDataEventType.h</key>
+		<dict>
+			<key>hash</key>
+			<data>
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+			<key>hash2</key>
+			<data>
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+		</dict>
+		<key>Headers/FIRDataSnapshot.h</key>
+		<dict>
+			<key>hash</key>
+			<data>
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+			<data>
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+		</dict>
+		<key>Headers/FIRDatabase.h</key>
+		<dict>
+			<key>hash</key>
+			<data>
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+		</dict>
+		<key>Headers/FIRDatabaseQuery.h</key>
+		<dict>
+			<key>hash</key>
+			<data>
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+			<key>hash2</key>
+			<data>
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+		</dict>
+		<key>Headers/FIRDatabaseReference.h</key>
+		<dict>
+			<key>hash</key>
+			<data>
+			aUPNeHv+7QXU77WvkkzLBflL434=
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+			<key>hash2</key>
+			<data>
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+		</dict>
+		<key>Headers/FIRMutableData.h</key>
+		<dict>
+			<key>hash</key>
+			<data>
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+			<data>
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+		</dict>
+		<key>Headers/FIRServerValue.h</key>
+		<dict>
+			<key>hash</key>
+			<data>
+			VulktzkncL3JZO9la/gruOa9LMo=
+			</data>
+			<key>hash2</key>
+			<data>
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+		</dict>
+		<key>Headers/FIRTransactionResult.h</key>
+		<dict>
+			<key>hash</key>
+			<data>
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+			<data>
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+			</data>
+		</dict>
+		<key>Headers/FirebaseDatabase.h</key>
+		<dict>
+			<key>hash</key>
+			<data>
+			WzB+Hgl8mCR/GcXAOGW5mT4tGpM=
+			</data>
+			<key>hash2</key>
+			<data>
+			8fJzrSJu9I43nZLNMjsZU2CtOIgicTWtAk7DUbdcctY=
+			</data>
+		</dict>
+		<key>Modules/module.modulemap</key>
+		<dict>
+			<key>hash</key>
+			<data>
+			JsRm4MDrfOXF74fpRlVXodMbvRg=
+			</data>
+			<key>hash2</key>
+			<data>
+			b/upHPLrKgZQXDu4REd8zobitN6KxFXcU++KQDJdqDY=
+			</data>
+		</dict>
+	</dict>
+	<key>rules</key>
+	<dict>
+		<key>^</key>
+		<true/>
+		<key>^.*\.lproj/</key>
+		<dict>
+			<key>optional</key>
+			<true/>
+			<key>weight</key>
+			<real>1000</real>
+		</dict>
+		<key>^.*\.lproj/locversion.plist$</key>
+		<dict>
+			<key>omit</key>
+			<true/>
+			<key>weight</key>
+			<real>1100</real>
+		</dict>
+		<key>^version.plist$</key>
+		<true/>
+	</dict>
+	<key>rules2</key>
+	<dict>
+		<key>.*\.dSYM($|/)</key>
+		<dict>
+			<key>weight</key>
+			<real>11</real>
+		</dict>
+		<key>^</key>
+		<dict>
+			<key>weight</key>
+			<real>20</real>
+		</dict>
+		<key>^(.*/)?\.DS_Store$</key>
+		<dict>
+			<key>omit</key>
+			<true/>
+			<key>weight</key>
+			<real>2000</real>
+		</dict>
+		<key>^(Frameworks|SharedFrameworks|PlugIns|Plug-ins|XPCServices|Helpers|MacOS|Library/(Automator|Spotlight|LoginItems))/</key>
+		<dict>
+			<key>nested</key>
+			<true/>
+			<key>weight</key>
+			<real>10</real>
+		</dict>
+		<key>^.*</key>
+		<true/>
+		<key>^.*\.lproj/</key>
+		<dict>
+			<key>optional</key>
+			<true/>
+			<key>weight</key>
+			<real>1000</real>
+		</dict>
+		<key>^.*\.lproj/locversion.plist$</key>
+		<dict>
+			<key>omit</key>
+			<true/>
+			<key>weight</key>
+			<real>1100</real>
+		</dict>
+		<key>^Info\.plist$</key>
+		<dict>
+			<key>omit</key>
+			<true/>
+			<key>weight</key>
+			<real>20</real>
+		</dict>
+		<key>^PkgInfo$</key>
+		<dict>
+			<key>omit</key>
+			<true/>
+			<key>weight</key>
+			<real>20</real>
+		</dict>
+		<key>^[^/]+$</key>
+		<dict>
+			<key>nested</key>
+			<true/>
+			<key>weight</key>
+			<real>10</real>
+		</dict>
+		<key>^embedded\.provisionprofile$</key>
+		<dict>
+			<key>weight</key>
+			<real>20</real>
+		</dict>
+		<key>^version\.plist$</key>
+		<dict>
+			<key>weight</key>
+			<real>20</real>
+		</dict>
+	</dict>
+</dict>
+</plist>
diff --git a/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/_CodeSignature/CodeSignature b/Example/Pods/FirebaseDatabase/Frameworks/FirebaseDatabase.framework/_CodeSignature/CodeSignature
new file mode 100755
index 0000000..e69de29
diff --git a/Example/Pods/FirebaseInstanceID/CHANGELOG.md b/Example/Pods/FirebaseInstanceID/CHANGELOG.md
deleted file mode 100644
index 70bd105..0000000
--- a/Example/Pods/FirebaseInstanceID/CHANGELOG.md
+++ /dev/null
@@ -1,21 +0,0 @@
-# 2016-05-16 -- v1.0.6
-
-- Fix CocoaPod linter issues for InstanceID pod.
-
-# 2016-05-13 -- v1.0.5
-
-- Fix Authorization errors for InstanceID tokens.
-
-# 2016-05-11 -- v1.0.4
-
-- Reduce wait for InstanceID token during parallel requests.
-
-# 2016-04-18 -- v1.0.3
-
-- Change flag to disable swizzling to *FirebaseAppDelegateProxyEnabled*.
-- Fix incessant Keychain errors while accessing InstanceID.
-- Fix max retries for fetching IID token.
-
-# 2016-04-18 -- v1.0.2
-
-- Register for remote notifications on iOS8+ in the SDK itself.
diff --git a/Example/Pods/FirebaseInstanceID/Frameworks/FirebaseInstanceID.framework/FirebaseInstanceID b/Example/Pods/FirebaseInstanceID/Frameworks/frameworks/FirebaseInstanceID.framework/FirebaseInstanceID
similarity index 68%
rename from Example/Pods/FirebaseInstanceID/Frameworks/FirebaseInstanceID.framework/FirebaseInstanceID
rename to Example/Pods/FirebaseInstanceID/Frameworks/frameworks/FirebaseInstanceID.framework/FirebaseInstanceID
index 9e1a63a..5d67d05 100755
Binary files a/Example/Pods/FirebaseInstanceID/Frameworks/FirebaseInstanceID.framework/FirebaseInstanceID and b/Example/Pods/FirebaseInstanceID/Frameworks/frameworks/FirebaseInstanceID.framework/FirebaseInstanceID differ
diff --git a/Example/Pods/FirebaseInstanceID/Frameworks/FirebaseInstanceID.framework/Headers/FIRInstanceID.h b/Example/Pods/FirebaseInstanceID/Frameworks/frameworks/FirebaseInstanceID.framework/Headers/FIRInstanceID.h
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseInstanceID/Frameworks/FirebaseInstanceID.framework/Headers/FIRInstanceID.h
rename to Example/Pods/FirebaseInstanceID/Frameworks/frameworks/FirebaseInstanceID.framework/Headers/FIRInstanceID.h
diff --git a/Example/Pods/FirebaseInstanceID/Frameworks/FirebaseInstanceID.framework/Headers/FirebaseInstanceID.h b/Example/Pods/FirebaseInstanceID/Frameworks/frameworks/FirebaseInstanceID.framework/Headers/FirebaseInstanceID.h
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseInstanceID/Frameworks/FirebaseInstanceID.framework/Headers/FirebaseInstanceID.h
rename to Example/Pods/FirebaseInstanceID/Frameworks/frameworks/FirebaseInstanceID.framework/Headers/FirebaseInstanceID.h
diff --git a/Example/Pods/FirebaseInstanceID/Frameworks/FirebaseInstanceID.framework/Modules/module.modulemap b/Example/Pods/FirebaseInstanceID/Frameworks/frameworks/FirebaseInstanceID.framework/Modules/module.modulemap
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseInstanceID/Frameworks/FirebaseInstanceID.framework/Modules/module.modulemap
rename to Example/Pods/FirebaseInstanceID/Frameworks/frameworks/FirebaseInstanceID.framework/Modules/module.modulemap
diff --git a/Example/Pods/FirebaseInstanceID/README.md b/Example/Pods/FirebaseInstanceID/README.md
deleted file mode 100644
index e6fb90d..0000000
--- a/Example/Pods/FirebaseInstanceID/README.md
+++ /dev/null
@@ -1,10 +0,0 @@
-# InstanceID SDK for iOS
-
-Instance ID provides a unique ID per instance of your apps and also provides a
-mechanism to authenticate and authorize actions, like sending messages via
-Google Cloud Messaging (GCM).
-
-
-Please visit [our developer
-site](https://developers.google.com/instance-id/) for integration instructions,
-documentation, support information, and terms of service.
diff --git a/Example/Pods/FirebaseInstanceID/Headers/Public/FIRInstanceID.h b/Example/Pods/FirebaseInstanceID/Sources/FIRInstanceID.h
old mode 100644
new mode 100755
similarity index 100%
rename from Example/Pods/FirebaseInstanceID/Headers/Public/FIRInstanceID.h
rename to Example/Pods/FirebaseInstanceID/Sources/FIRInstanceID.h
diff --git a/Example/Pods/FirebaseRemoteConfig/CHANGELOG b/Example/Pods/FirebaseRemoteConfig/CHANGELOG
new file mode 100755
index 0000000..f6f0fb0
--- /dev/null
+++ b/Example/Pods/FirebaseRemoteConfig/CHANGELOG
@@ -0,0 +1,26 @@
+Version 1.3.1
+==================================
+Resolved Issues:
+- Better documentation on the public headers.
+
+Version 1.3.0
+==================================
+Features:
+-  Support user property targeting for analytics abilities.
+
+Resolved Issues:
+- Fix critical crashes due to concurrent fetches, make it more thread safe.
+
+Version 1.2.0
+==================================
+Features:
+- Add two new API methods to allow developers to get all the keys based on a key prefix.
+
+Resolved Issues:
+- Fix a crash issue during fetching config.
+- Clarify the confusion on the documents of activateFetched method.
+- Correct the cast error in the comment of remoteConfig method.
+
+Version 1.1.1
+==================================
+Initial release in Google I/O 2016.
diff --git a/Example/Pods/FirebaseRemoteConfig/Frameworks/frameworks/FirebaseRemoteConfig.framework/FirebaseRemoteConfig b/Example/Pods/FirebaseRemoteConfig/Frameworks/frameworks/FirebaseRemoteConfig.framework/FirebaseRemoteConfig
new file mode 100755
index 0000000..98fcf4d
Binary files /dev/null and b/Example/Pods/FirebaseRemoteConfig/Frameworks/frameworks/FirebaseRemoteConfig.framework/FirebaseRemoteConfig differ
diff --git a/Example/Pods/FirebaseRemoteConfig/Frameworks/frameworks/FirebaseRemoteConfig.framework/Headers/FIRRemoteConfig.h b/Example/Pods/FirebaseRemoteConfig/Frameworks/frameworks/FirebaseRemoteConfig.framework/Headers/FIRRemoteConfig.h
new file mode 100755
index 0000000..395020c
--- /dev/null
+++ b/Example/Pods/FirebaseRemoteConfig/Frameworks/frameworks/FirebaseRemoteConfig.framework/Headers/FIRRemoteConfig.h
@@ -0,0 +1,224 @@
+//
+//  FIRRemoteConfig.h
+//  Firebase Remote Config service SDK
+//  Copyright 2016 Google Inc. All rights reserved.
+//
+#import <Foundation/Foundation.h>
+
+/// The Firebase Remote Config service default namespace, to be used if the API method does not
+/// specify a different namespace. Use the default namespace if configuring from the Google Firebase
+/// service.
+extern NSString *const __nonnull FIRNamespaceGoogleMobilePlatform;
+
+/// Key used to manage throttling in NSError user info when the refreshing of Remote Config
+/// parameter values (data) is throttled. The value of this key is the elapsed time since 1970,
+/// measured in seconds.
+extern NSString *const __nonnull FIRRemoteConfigThrottledEndTimeInSecondsKey;
+
+/// Indicates whether updated data was successfully fetched.
+typedef NS_ENUM(NSInteger, FIRRemoteConfigFetchStatus) {
+  /// Config has never been fetched.
+  FIRRemoteConfigFetchStatusNoFetchYet,
+  /// Config fetch succeeded.
+  FIRRemoteConfigFetchStatusSuccess,
+  /// Config fetch failed.
+  FIRRemoteConfigFetchStatusFailure,
+  /// Config fetch was throttled.
+  FIRRemoteConfigFetchStatusThrottled,
+};
+
+/// Remote Config error domain that handles errors when fetching data from the service.
+extern NSString *const __nonnull FIRRemoteConfigErrorDomain;
+/// Firebase Remote Config service fetch error.
+typedef NS_ENUM(NSInteger, FIRRemoteConfigError) {
+  /// Unknown or no error.
+  FIRRemoteConfigErrorUnknown = 8001,
+  /// Frequency of fetch requests exceeds throttled limit.
+  FIRRemoteConfigErrorThrottled = 8002,
+  /// Internal error that covers all internal HTTP errors.
+  FIRRemoteConfigErrorInternalError = 8003,
+};
+
+/// Enumerated value that indicates the source of Remote Config data. Data can come from
+/// the Remote Config service, the DefaultConfig that is available when the app is first installed,
+/// or a static initialized value if data is not available from the service or DefaultConfig.
+typedef NS_ENUM(NSInteger, FIRRemoteConfigSource) {
+  FIRRemoteConfigSourceRemote,   ///< The data source is the Remote Config service.
+  FIRRemoteConfigSourceDefault,  ///< The data source is the DefaultConfig defined for this app.
+  FIRRemoteConfigSourceStatic,   ///< The data doesn't exist, return a static initialized value.
+};
+
+/// Completion handler invoked by fetch methods when they get a response from the server.
+///
+/// @param status Config fetching status.
+/// @param error  Error message on failure.
+typedef void (^FIRRemoteConfigFetchCompletion)(FIRRemoteConfigFetchStatus status,
+                                               NSError *__nullable error);
+
+#pragma mark - FIRRemoteConfigValue
+/// This class provides a wrapper for Remote Config parameter values, with methods to get parameter
+/// values as different data types.
+@interface FIRRemoteConfigValue : NSObject<NSCopying>
+/// Gets the value as a string.
+@property(nonatomic, readonly, nullable) NSString *stringValue;
+/// Gets the value as a number value.
+@property(nonatomic, readonly, nullable) NSNumber *numberValue;
+/// Gets the value as a NSData object.
+@property(nonatomic, readonly, nonnull) NSData *dataValue;
+/// Gets the value as a boolean.
+@property(nonatomic, readonly) BOOL boolValue;
+/// Identifies the source of the fetched value.
+@property(nonatomic, readonly) FIRRemoteConfigSource source;
+@end
+
+#pragma mark - FIRRemoteConfigSettings
+/// Firebase Remote Config settings.
+@interface FIRRemoteConfigSettings : NSObject
+/// Indicates whether Developer Mode is enabled.
+@property(nonatomic, readonly) BOOL isDeveloperModeEnabled;
+/// Initializes FIRRemoteConfigSettings, which is used to set properties for custom settings. To
+/// make custom settings take effect, pass the FIRRemoteConfigSettings instance to the
+/// configSettings property of FIRRemoteConfig.
+- (nullable FIRRemoteConfigSettings *)initWithDeveloperModeEnabled:(BOOL)developerModeEnabled
+    NS_DESIGNATED_INITIALIZER;
+@end
+
+#pragma mark - FIRRemoteConfig
+/// Firebase Remote Config class. The shared instance method +remoteConfig can be created and used
+/// to fetch, activate and read config results and set default config results.
+@interface FIRRemoteConfig : NSObject<NSFastEnumeration>
+/// Last successful fetch completion time.
+@property(nonatomic, readonly, strong, nullable) NSDate *lastFetchTime;
+/// Last fetch status. The status can be any enumerated value from FIRRemoteConfigFetchStatus.
+@property(nonatomic, readonly, assign) FIRRemoteConfigFetchStatus lastFetchStatus;
+/// Config settings are custom settings.
+@property(nonatomic, readwrite, strong, nonnull) FIRRemoteConfigSettings *configSettings;
+
+/// Returns the FIRRemoteConfig instance shared throughout your app. This singleton object contains
+/// the complete set of Remote Config parameter values available to the app, including the Active
+/// Config and Default Config. This object also caches values fetched from the Remote Config Server
+/// until they are copied to the Active Config by calling activateFetched.
+/// When you fetch values from the Remote Config Server using the default Firebase namespace
+/// service, you should use this class method to create a shared instance of the FIRRemoteConfig
+/// object to ensure that your app will function properly with the Remote Config Server and the
+/// Firebase service.
++ (nonnull FIRRemoteConfig *)remoteConfig NS_SWIFT_NAME(remoteConfig());
+
+/// Unavailable. Use +remoteConfig instead.
+- (nonnull instancetype)init __attribute__((unavailable("Use +remoteConfig instead.")));
+
+#pragma mark - Fetch
+/// Fetches Remote Config data with a callback. Call activateFetched to make fetched data available
+/// to your app.
+/// @param completionHandler Fetch operation callback.
+- (void)fetchWithCompletionHandler:(nullable FIRRemoteConfigFetchCompletion)completionHandler;
+
+/// Fetches Remote Config data and sets a duration that specifies how long config data lasts.
+/// Call activateFetched to make fetched data available to your app.
+/// @param expirationDuration  Duration that defines how long fetched config data is available, in
+///                            seconds. When the config data expires, a new fetch is required.
+/// @param completionHandler   Fetch operation callback.
+- (void)fetchWithExpirationDuration:(NSTimeInterval)expirationDuration
+                  completionHandler:(nullable FIRRemoteConfigFetchCompletion)completionHandler;
+
+#pragma mark - Apply
+/// Applies Fetched Config data to the Active Config, causing updates to the behavior and appearance
+/// of the app to take effect (depending on how config data is used in the app).
+/// Returns true if there was a Fetched Config, and it was activated.
+/// Returns false if no Fetched Config was found, or the Fetched Config was already activated.
+- (BOOL)activateFetched;
+
+#pragma mark - Get Config
+/// Enables access to configuration values by using object subscripting syntax.
+/// This is used to get the config value of the default namespace.
+/// <pre>
+/// // Example:
+/// FIRRemoteConfig *config = [FIRRemoteConfig remoteConfig];
+/// FIRRemoteConfigValue *value = config[@"yourKey"];
+/// BOOL b = value.boolValue;
+/// NSNumber *number = config[@"yourKey"].numberValue;
+/// </pre>
+- (nonnull FIRRemoteConfigValue *)objectForKeyedSubscript:(nonnull NSString *)key;
+
+/// Gets the config value of the default namespace.
+/// @param key Config key.
+- (nonnull FIRRemoteConfigValue *)configValueForKey:(nullable NSString *)key;
+
+/// Gets the config value of a given namespace.
+/// @param key              Config key.
+/// @param aNamespace       Config results under a given namespace.
+- (nonnull FIRRemoteConfigValue *)configValueForKey:(nullable NSString *)key
+                                          namespace:(nullable NSString *)aNamespace;
+
+/// Gets the config value of a given namespace and a given source.
+/// @param key              Config key.
+/// @param aNamespace       Config results under a given namespace.
+/// @param source           Config value source.
+- (nonnull FIRRemoteConfigValue *)configValueForKey:(nullable NSString *)key
+                                          namespace:(nullable NSString *)aNamespace
+                                             source:(FIRRemoteConfigSource)source;
+
+/// Gets all the parameter keys from a given source and a given namespace.
+///
+/// @param source           The config data source.
+/// @param aNamespace       The config data namespace.
+/// @return                 An array of keys under the given source and namespace.
+- (nonnull NSArray<NSString *> *)allKeysFromSource:(FIRRemoteConfigSource)source
+                                         namespace:(nullable NSString *)aNamespace;
+
+/// Returns the set of parameter keys that start with the given prefix, from the default namespace
+///                         in the active config.
+///
+/// @param prefix           The key prefix to look for. If prefix is nil or empty, returns all the
+///                         keys.
+/// @return                 The set of parameter keys that start with the specified prefix.
+- (nonnull NSSet<NSString *> *)keysWithPrefix:(nullable NSString *)prefix;
+
+/// Returns the set of parameter keys that start with the given prefix, from the given namespace in
+///                         the active config.
+///
+/// @param prefix           The key prefix to look for. If prefix is nil or empty, returns all the
+///                         keys in the given namespace.
+/// @param aNamespace       The namespace in which to look up the keys. If the namespace is invalid,
+///                         returns an empty set.
+/// @return                 The set of parameter keys that start with the specified prefix.
+- (nonnull NSSet<NSString *> *)keysWithPrefix:(nullable NSString *)prefix
+                                    namespace:(nullable NSString *)aNamespace;
+
+#pragma mark - Defaults
+/// Sets config defaults for parameter keys and values in the default namespace config.
+///
+/// @param defaultConfig    A dictionary mapping a NSString * key to a NSObject * value.
+- (void)setDefaults:(nullable NSDictionary<NSString *, NSObject *> *)defaults;
+
+/// Sets config defaults for parameter keys and values in the default namespace config.
+///
+/// @param defaultConfig    A dictionary mapping a NSString * key to a NSObject * value.
+/// @param aNamespace       Config under a given namespace.
+- (void)setDefaults:(nullable NSDictionary<NSString *, NSObject *> *)defaultConfig
+          namespace:(nullable NSString *)aNamespace;
+
+/// Sets default configs from plist for default namespace;
+/// @param fileName The plist file name, with no file name extension. For example, if the plist file
+///                 is defaultSamples.plist, call:
+///                 [[FIRRemoteConfig remoteConfig] setDefaultsFromPlistFileName:@"defaultSamples"];
+- (void)setDefaultsFromPlistFileName:(nullable NSString *)fileName;
+
+/// Sets default configs from plist for a given namespace;
+/// @param fileName The plist file name, with no file name extension. For example, if the plist file
+///                 is defaultSamples.plist, call:
+///                 [[FIRRemoteConfig remoteConfig] setDefaultsFromPlistFileName:@"defaultSamples"];
+/// @param aNamespace The namespace where the default config is set.
+- (void)setDefaultsFromPlistFileName:(nullable NSString *)fileName
+                           namespace:(nullable NSString *)aNamespace;
+
+/// Returns the default value of a given key and a given namespace from the default config.
+///
+/// @param key              The parameter key of default config.
+/// @param aNamespace       The namespace of default config.
+/// @return                 Returns the default value of the specified key and namespace. Returns
+///                         nil if the key or namespace doesn't exist in the default config.
+- (nullable FIRRemoteConfigValue *)defaultValueForKey:(nullable NSString *)key
+                                            namespace:(nullable NSString *)aNamespace;
+
+@end
diff --git a/Example/Pods/FirebaseRemoteConfig/Frameworks/frameworks/FirebaseRemoteConfig.framework/Headers/FirebaseRemoteConfig.h b/Example/Pods/FirebaseRemoteConfig/Frameworks/frameworks/FirebaseRemoteConfig.framework/Headers/FirebaseRemoteConfig.h
new file mode 100755
index 0000000..e8165a7
--- /dev/null
+++ b/Example/Pods/FirebaseRemoteConfig/Frameworks/frameworks/FirebaseRemoteConfig.framework/Headers/FirebaseRemoteConfig.h
@@ -0,0 +1,3 @@
+// Generated umbrella header for FirebaseRemoteConfig.
+
+#import "FIRRemoteConfig.h"
diff --git a/Example/Pods/FirebaseRemoteConfig/Frameworks/frameworks/FirebaseRemoteConfig.framework/Modules/module.modulemap b/Example/Pods/FirebaseRemoteConfig/Frameworks/frameworks/FirebaseRemoteConfig.framework/Modules/module.modulemap
new file mode 100755
index 0000000..5e622a4
--- /dev/null
+++ b/Example/Pods/FirebaseRemoteConfig/Frameworks/frameworks/FirebaseRemoteConfig.framework/Modules/module.modulemap
@@ -0,0 +1,11 @@
+framework module FirebaseRemoteConfig {
+
+  export *
+
+  umbrella header "FirebaseRemoteConfig.h"
+
+  header "FIRRemoteConfig.h"
+
+  link "sqlite3"
+  link "z"
+}
diff --git a/Example/Pods/FirebaseRemoteConfig/README.md b/Example/Pods/FirebaseRemoteConfig/README.md
new file mode 100755
index 0000000..9f001f4
--- /dev/null
+++ b/Example/Pods/FirebaseRemoteConfig/README.md
@@ -0,0 +1,11 @@
+# Firebase Remote Config SDK for iOS
+
+This pod contains the Firebase Remote Config SDK for iOS, supporting both
+Objective-C and Swift.
+
+Firebase Remote Config is a cloud service that lets you change the appearance
+and behavior of your app without requiring users to download an app update.
+
+Please visit [our developer site]
+(https://firebase.google.com/docs/remote-config/) for integration instructions,
+documentation, support information, and terms of service.
diff --git a/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/FirebaseStorage b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/FirebaseStorage
new file mode 100755
index 0000000..e5e32f4
Binary files /dev/null and b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/FirebaseStorage differ
diff --git a/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorage.h b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorage.h
new file mode 100755
index 0000000..78c40d6
--- /dev/null
+++ b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorage.h
@@ -0,0 +1,101 @@
+// clang-format off
+/** @file FIRStorage.h
+    @brief Firebase SDK
+    @copyright Copyright 2016 Google Inc.
+    @remarks Use of this SDK is subject to the Google APIs Terms of Service:
+    https://developers.google.com/terms/
+ */
+// clang-format on
+
+#import <Foundation/Foundation.h>
+
+#import "FIRStorageConstants.h"
+
+@class FIRApp;
+@class FIRStorageReference;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * FirebaseStorage is a service that supports uploading and downloading binary objects,
+ * such as images, videos, and other files to Google Cloud Storage.
+ *
+ * If you call [FIRStorage storage], the instance will initialize with the default FIRApp,
+ * [FIRApp defaultApp], and the storage location will come from the provided
+ * GoogleService-Info.plist.
+ *
+ * If you call [FIRStorage storageForApp:] and provide a custom instance of FIRApp,
+ * the storage location will be specified via the FIROptions#storageBucket property.
+ */
+@interface FIRStorage : NSObject
+
+/**
+ * Creates an instance of FIRStorage, configured with the default FIRApp.
+ * @return the FIRStorage instance, initialized with the default FIRApp.
+ */
++ (instancetype)storage NS_SWIFT_NAME(storage());
+
+/**
+ * Creates an instance of FIRStorage, configured with the custom FIRApp @a app.
+ * @param app The custom FIRApp used for initialization.
+ * @return the FIRStorage instance, initialized with the custom FIRApp.
+ */
++ (instancetype)storageForApp:(FIRApp *)app NS_SWIFT_NAME(storage(app:));
+
+/**
+ * The Firebase App associated with this Firebase Storage instance.
+ */
+@property(strong, nonatomic, readonly) FIRApp *app;
+
+/**
+ * Maximum time in seconds to retry an upload if a failure occurs.
+ * Defaults to 10 minutes (600 seconds).
+ */
+@property NSTimeInterval maxUploadRetryTime;
+
+/**
+ * Maximum time in seconds to retry a download if a failure occurs.
+ * Defaults to 10 minutes (600 seconds).
+ */
+@property NSTimeInterval maxDownloadRetryTime;
+
+/**
+ * Maximum time in seconds to retry operations other than upload and download if a failure occurs.
+ * Defaults to 2 minutes (120 seconds).
+ */
+@property NSTimeInterval maxOperationRetryTime;
+
+/**
+ * Queue that all developer callbacks are fired on. Defaults to the main queue.
+ */
+@property(strong, nonatomic) dispatch_queue_t callbackQueue;
+
+/**
+ * Creates a FIRStorageReference initialized at the root Firebase Storage location.
+ * @return An instance of FIRStorageReference initialized at the root.
+ */
+- (FIRStorageReference *)reference;
+
+/**
+ * Creates a FIRStorageReference given a gs:// or https:// URL pointing to a Firebase Storage
+ * location. For example, you can pass in an https:// download URL retrieved from
+ * [FIRStorageReference downloadURLWithCompletion] or the gs:// URI from
+ * [FIRStorageReference description].
+ * @param string A gs:// or https:// URL to initialize the reference with.
+ * @return An instance of FIRStorageReference at the given child path.
+ * @throws Throws an exception if passed in URL is not associated with the FIRApp used to initialize
+ * this FIRStorage.
+ */
+- (FIRStorageReference *)referenceForURL:(NSString *)string;
+
+/**
+ * Creates a FIRStorageReference initialized at a child Firebase Storage location.
+ * @param string A relative path from the root to initialize the reference with,
+ * for instance @"path/to/object".
+ * @return An instance of FIRStorageReference at the given child path.
+ */
+- (FIRStorageReference *)referenceWithPath:(NSString *)string;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageConstants.h b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageConstants.h
new file mode 100755
index 0000000..1df448d
--- /dev/null
+++ b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageConstants.h
@@ -0,0 +1,159 @@
+// clang-format off
+/** @file FIRStorageConstants.h
+    @brief Firebase SDK
+    @copyright Copyright 2016 Google Inc.
+    @remarks Use of this SDK is subject to the Google APIs Terms of Service:
+    https://developers.google.com/terms/
+ */
+// clang-format on
+
+#import <Foundation/Foundation.h>
+
+@class FIRStorageDownloadTask;
+@class FIRStorageMetadata;
+@class FIRStorageTaskSnapshot;
+@class FIRStorageUploadTask;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * NSString typedef representing a task listener handle.
+ */
+typedef NSString *FIRStorageHandle;
+
+/**
+ * Block typedef typically used when downloading data.
+ * @param data The data returned by the download, or nil if no data available or download failed.
+ * @param error The error describing failure, if one occurred.
+ */
+typedef void (^FIRStorageVoidDataError)(NSData *_Nullable data, NSError *_Nullable error);
+
+/**
+ * Block typedef typically used when performing "binary" async operations such as delete,
+ * where the operation either succeeds without an error or fails with an error.
+ * @param error The error describing failure, if one occurred.
+ */
+typedef void (^FIRStorageVoidError)(NSError *_Nullable error);
+
+/**
+ * Block typedef typically used when retrieving metadata.
+ * @param metadata The metadata returned by the operation, if metadata exists.
+ */
+typedef void (^FIRStorageVoidMetadata)(FIRStorageMetadata *_Nullable metadata);
+
+/**
+ * Block typedef typically used when retrieving metadata with the possibility of an error.
+ * @param metadata The metadata returned by the operation, if metadata exists.
+ * @param error The error describing failure, if one occurred.
+ */
+typedef void (^FIRStorageVoidMetadataError)(FIRStorageMetadata *_Nullable metadata,
+                                            NSError *_Nullable error);
+
+/**
+ * Block typedef typically used to asynchronously return a storage task snapshot.
+ * @param snapshot The returned task snapshot.
+ */
+typedef void (^FIRStorageVoidSnapshot)(FIRStorageTaskSnapshot *snapshot);
+
+/**
+ * Block typedef typically used when retrieving a download URL.
+ * @param URL The download URL associated with the operation.
+ * @param error The error describing failure, if one occurred.
+ */
+typedef void (^FIRStorageVoidURLError)(NSURL *_Nullable URL, NSError *_Nullable error);
+
+/**
+ * Enum representing the upload and download task status.
+ */
+typedef NS_ENUM(NSInteger, FIRStorageTaskStatus) {
+  /**
+   * Unknown task status.
+   */
+  FIRStorageTaskStatusUnknown,
+
+  /**
+   * Task is being resumed.
+   */
+  FIRStorageTaskStatusResume,
+
+  /**
+   * Task reported a progress event.
+   */
+  FIRStorageTaskStatusProgress,
+
+  /**
+   * Task is paused.
+   */
+  FIRStorageTaskStatusPause,
+
+  /**
+   * Task has completed successfully.
+   */
+  FIRStorageTaskStatusSuccess,
+
+  /**
+   * Task has failed and is unrecoverable.
+   */
+  FIRStorageTaskStatusFailure
+};
+
+/**
+ * Firebase Storage error domain.
+ */
+FOUNDATION_EXPORT NSString *const FIRStorageErrorDomain;
+
+/**
+ * Enum representing the errors raised by Firebase Storage.
+ */
+typedef NS_ENUM(NSInteger, FIRStorageErrorCode) {
+  /** An unknown error occurred. */
+  FIRStorageErrorCodeUnknown = -13000,
+
+  /** No object exists at the desired reference. */
+  FIRStorageErrorCodeObjectNotFound = -13010,
+
+  /** No bucket is configured for Firebase Storage. */
+  FIRStorageErrorCodeBucketNotFound = -13011,
+
+  /** No project is configured for Firebase Storage. */
+  FIRStorageErrorCodeProjectNotFound = -13012,
+
+  /**
+   * Quota on your Firebase Storage bucket has been exceeded.
+   * If you're on the free tier, upgrade to a paid plan.
+   * If you're on a paid plan, reach out to Firebase support.
+   */
+  FIRStorageErrorCodeQuotaExceeded = -13013,
+
+  /** User is unauthenticated. Authenticate and try again. */
+  FIRStorageErrorCodeUnauthenticated = -13020,
+
+  /**
+   * User is not authorized to perform the desired action.
+   * Check your rules to ensure they are correct.
+   */
+  FIRStorageErrorCodeUnauthorized = -13021,
+
+  /**
+   * The maximum time limit on an operation (upload, download, delete, etc.) has been exceeded.
+   * Try uploading again.
+   */
+  FIRStorageErrorCodeRetryLimitExceeded = -13030,
+
+  /**
+   * File on the client does not match the checksum of the file recieved by the server.
+   * Try uploading again.
+   */
+  FIRStorageErrorCodeNonMatchingChecksum = -13031,
+
+  /** User canceled the operation. */
+  FIRStorageErrorCodeDownloadSizeExceeded = -13032,
+
+  /**
+   * Size of the downloaded file exceeds the amount of memory allocated for the download.
+   * Increase memory cap and try downloading again.
+   */
+  FIRStorageErrorCodeCancelled = -13040
+};
+
+NS_ASSUME_NONNULL_END
diff --git a/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageDownloadTask.h b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageDownloadTask.h
new file mode 100755
index 0000000..efeb34e
--- /dev/null
+++ b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageDownloadTask.h
@@ -0,0 +1,30 @@
+// clang-format off
+/** @file FIRStorageDownloadTask.h
+    @brief Firebase SDK
+    @copyright Copyright 2016 Google Inc.
+    @remarks Use of this SDK is subject to the Google APIs Terms of Service:
+    https://developers.google.com/terms/
+ */
+// clang-format on
+
+#import <Foundation/Foundation.h>
+
+#import "FIRStorageObservableTask.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * FIRStorageDownloadTask implements resumable downloads from an object in Firebase Storage.
+ * Downloads can be returned on completion with a completion handler, and can be monitored
+ * by attaching observers, or controlled by calling FIRStorageTask#pause, FIRStorageTask#resume,
+ * or FIRStorageTask#cancel.
+ * Downloads can currently be returned as NSData in memory, or as an NSURL to a file on disk.
+ * Downloads are performed on a background queue, and callbacks are raised on the developer
+ * specified callbackQueue in FIRStorage, or the main queue if left unspecified.
+ * Currently all uploads must be initiated and managed on the main queue.
+ */
+@interface FIRStorageDownloadTask : FIRStorageObservableTask<FIRStorageTaskManagement>
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageMetadata.h b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageMetadata.h
new file mode 100755
index 0000000..0e38ebf
--- /dev/null
+++ b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageMetadata.h
@@ -0,0 +1,138 @@
+// clang-format off
+/** @file FIRStorageMetadata.h
+    @brief Firebase SDK
+    @copyright Copyright 2016 Google Inc.
+    @remarks Use of this SDK is subject to the Google APIs Terms of Service:
+    https://developers.google.com/terms/
+ */
+// clang-format on
+
+#import <Foundation/Foundation.h>
+
+@class FIRStorageReference;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * Class which represents the metadata on an object in Firebase Storage. This metadata is
+ * returned on successful operations, and can be used to retrieve download URLs, content types,
+ * and a FIRStorage reference to the object in question. Full documentation can be found at the GCS
+ * Objects#resource docs.
+ * @see https://cloud.google.com/storage/docs/json_api/v1/objects#resource
+ */
+@interface FIRStorageMetadata : NSObject<NSCopying>
+
+/**
+ * The name of the bucket containing this object.
+ */
+@property(copy, nonatomic, readonly) NSString *bucket;
+
+/**
+ * Cache-Control directive for the object data.
+ */
+@property(copy, nonatomic, nullable) NSString *cacheControl;
+
+/**
+ * Content-Disposition of the object data.
+ */
+@property(copy, nonatomic, nullable) NSString *contentDisposition;
+
+/**
+ * Content-Encoding of the object data.
+ */
+@property(copy, nonatomic, nullable) NSString *contentEncoding;
+
+/**
+ * Content-Language of the object data.
+ */
+@property(copy, nonatomic, nullable) NSString *contentLanguage;
+
+/**
+ * Content-Type of the object data.
+ */
+@property(copy, nonatomic, nullable) NSString *contentType;
+
+/**
+ * The content generation of this object. Used for object versioning.
+ */
+@property(readonly) int64_t generation;
+
+/**
+ * User-provided metadata, in key/value pairs.
+ */
+@property(copy, nonatomic, nullable) NSDictionary<NSString *, NSString *> *customMetadata;
+
+/**
+ * The version of the metadata for this object at this generation. Used
+ * for preconditions and for detecting changes in metadata. A metageneration number is only
+ * meaningful in the context of a particular generation of a particular object.
+ */
+@property(readonly) int64_t metageneration;
+
+/**
+ * The name of this object, in gs://bucket/path/to/object.txt, this is object.txt.
+ */
+@property(copy, nonatomic, readonly, nullable) NSString *name;
+
+/**
+ * The full path of this object, in gs://bucket/path/to/object.txt, this is path/to/object.txt.
+ */
+@property(copy, nonatomic, readonly, nullable) NSString *path;
+
+/**
+ * Content-Length of the data in bytes.
+ */
+@property(readonly) int64_t size;
+
+/**
+ * The creation time of the object in RFC 3339 format.
+ */
+@property(copy, nonatomic, readonly, nullable) NSDate *timeCreated;
+
+/**
+ * The modification time of the object metadata in RFC 3339 format.
+ */
+@property(copy, nonatomic, readonly, nullable) NSDate *updated;
+
+/**
+ * A reference to the object in Firebase Storage.
+ */
+@property(strong, nonatomic, readonly, nullable) FIRStorageReference *storageReference;
+
+/**
+ * An array containing all download URLs available for the object.
+ */
+@property(strong, nonatomic, readonly, nullable) NSArray<NSURL *> *downloadURLs;
+
+/**
+ * Creates an instanece of FIRStorageMetadata from the contents of a dictionary.
+ * @return An instance of FIRStorageMetadata that represents the contents of a dictionary.
+ */
+- (nullable instancetype)initWithDictionary:(NSDictionary *)dictionary NS_DESIGNATED_INITIALIZER;
+
+/**
+ * Creates an NSDictionary from the contents of the metadata.
+ * @return An NSDictionary that represents the contents of the metadata.
+ */
+- (NSDictionary *)dictionaryRepresentation;
+
+/**
+ * Determines if the current metadata represents a "file".
+ */
+@property(readonly, getter=isFile) BOOL file;
+
+/**
+ * Determines if the current metadata represents a "folder".
+ */
+@property(readonly, getter=isFolder) BOOL folder;
+
+/**
+ * Retrieves a download URL for the given object, or nil if none exist.
+ * Note that if there are many valid download tokens, this will always return the first
+ * valid token created.
+ */
+- (nullable NSURL *)downloadURL;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageObservableTask.h b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageObservableTask.h
new file mode 100755
index 0000000..8b66ca7
--- /dev/null
+++ b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageObservableTask.h
@@ -0,0 +1,54 @@
+// clang-format off
+/** @file FIRStorageObservableTask.h
+    @brief Firebase SDK
+    @copyright Copyright 2016 Google Inc.
+    @remarks Use of this SDK is subject to the Google APIs Terms of Service:
+    https://developers.google.com/terms/
+ */
+// clang-format on
+
+#import "FIRStorageTask.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class FIRStorageReference;
+@class FIRStorageTaskSnapshot;
+
+/**
+ * Extends FIRStorageTask to provide observable semantics such as adding and removing observers.
+ * Observers produce a FIRStorageHandle, which is used to keep track of and remove specific
+ * observers at a later date.
+ * This class is currently not thread safe and can only be called on the main thread.
+ */
+@interface FIRStorageObservableTask : FIRStorageTask
+
+/**
+ * Observes changes in the upload status: Resume, Pause, Progress, Success, and Failure.
+ * @param status The FIRStorageTaskStatus change to observe.
+ * @param handler A callback that fires every time the status event occurs,
+ * returns a FIRStorageTaskSnapshot containing the state of the task.
+ * @return A task handle that can be used to remove the observer at a later date.
+ */
+- (FIRStorageHandle)observeStatus:(FIRStorageTaskStatus)status
+                          handler:(void (^)(FIRStorageTaskSnapshot *snapshot))handler;
+
+/**
+ * Removes the single observer with the provided handle.
+ * @param handle The handle of the task to remove.
+ */
+- (void)removeObserverWithHandle:(FIRStorageHandle)handle;
+
+/**
+ * Removes all observers for a single status.
+ * @param status A FIRStorageTaskStatus to remove listeners for.
+ */
+- (void)removeAllObserversForStatus:(FIRStorageTaskStatus)status;
+
+/**
+ * Removes all observers.
+ */
+- (void)removeAllObservers;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageReference.h b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageReference.h
new file mode 100755
index 0000000..2ed4f75
--- /dev/null
+++ b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageReference.h
@@ -0,0 +1,228 @@
+// clang-format off
+/** @file FIRStorageReference.h
+    @brief Firebase SDK
+    @copyright Copyright 2016 Google Inc.
+    @remarks Use of this SDK is subject to the Google APIs Terms of Service:
+    https://developers.google.com/terms/
+    */
+// clang-format on
+
+#import <Foundation/Foundation.h>
+
+#import "FIRStorage.h"
+#import "FIRStorageConstants.h"
+#import "FIRStorageDownloadTask.h"
+#import "FIRStorageMetadata.h"
+#import "FIRStorageTask.h"
+#import "FIRStorageUploadTask.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * FIRStorageReference represents a reference to a Google Cloud Storage object. Developers can
+ * upload and download objects, as well as get/set object metadata, and delete an object at the
+ * path.
+ * @see https://cloud.google.com/storage/
+ */
+@interface FIRStorageReference : NSObject
+
+/**
+ * The FIRStorage service object which created this reference.
+ */
+@property(nonatomic, readonly) FIRStorage *storage;
+
+/**
+ * The name of the Google Cloud Storage bucket associated with this reference,
+ * in gs://bucket/path/to/object.txt, the bucket would be: 'bucket'
+ */
+@property(nonatomic, readonly) NSString *bucket;
+
+/**
+ * The full path to this object, not including the Google Cloud Storage bucket.
+ * In gs://bucket/path/to/object.txt, the full path would be: 'path/to/object.txt'
+ */
+@property(nonatomic, readonly) NSString *fullPath;
+
+/**
+ * The short name of the object associated with this reference,
+ * in gs://bucket/path/to/object.txt, the name of the object would be: 'object.txt'
+ */
+@property(nonatomic, readonly) NSString *name;
+
+#pragma mark - Path Operations
+
+/**
+ * Creates a new FIRStorageReference pointing to the root object.
+ * @return A new FIRStorageReference pointing to the root object.
+ */
+- (FIRStorageReference *)root;
+
+/**
+ * Creates a new FIRStorageReference pointing to the parent of the current reference
+ * or nil if this instance references the root location.
+ * For example:
+ *   path = foo/bar/baz   parent = foo/bar
+ *   path = foo           parent = (root)
+ *   path = (root)        parent = nil
+ * @return A new FIRStorageReference pointing to the parent of the current reference.
+ */
+- (nullable FIRStorageReference *)parent;
+
+/**
+ * Creates a new FIRStorageReference pointing to a child object of the current reference.
+ *   path = foo      child = bar    newPath = foo/bar
+ *   path = foo/bar  child = baz    newPath = foo/bar/baz
+ * All leading and trailing slashes will be removed, and consecutive slashes will be
+ * compressed to single slashes. For example:
+ *   child = /foo/bar     newPath = foo/bar
+ *   child = foo/bar/     newPath = foo/bar
+ *   child = foo///bar    newPath = foo/bar
+ * @param path Path to append to the current path.
+ * @return A new FIRStorageReference pointing to a child location of the current reference.
+ */
+- (FIRStorageReference *)child:(NSString *)path;
+
+#pragma mark - Uploads
+
+/**
+ * Asynchronously uploads data to the currently specified FIRStorageReference,
+ * without additional metadata.
+ * This is not recommended for large files, and one should instead upload a file from disk.
+ * @param uploadData The NSData to upload.
+ * @return An instance of FIRStorageUploadTask, which can be used to monitor or manage the upload.
+ */
+- (FIRStorageUploadTask *)putData:(NSData *)uploadData;
+
+/**
+ * Asynchronously uploads data to the currently specified FIRStorageReference.
+ * This is not recommended for large files, and one should instead upload a file from disk.
+ * @param uploadData The NSData to upload.
+ * @param metadata FIRStorageMetadata containing additional information (MIME type, etc.)
+ * about the object being uploaded.
+ * @return An instance of FIRStorageUploadTask, which can be used to monitor or manage the upload.
+ */
+- (FIRStorageUploadTask *)putData:(NSData *)uploadData
+                         metadata:(nullable FIRStorageMetadata *)metadata;
+
+/**
+ * Asynchronously uploads data to the currently specified FIRStorageReference.
+ * This is not recommended for large files, and one should instead upload a file from disk.
+ * @param uploadData The NSData to upload.
+ * @param metadata FIRStorageMetadata containing additional information (MIME type, etc.)
+ * about the object being uploaded.
+ * @param completion A completion block that either returns the object metadata on success,
+ * or an error on failure.
+ * @return An instance of FIRStorageUploadTask, which can be used to monitor or manage the upload.
+ */
+- (FIRStorageUploadTask *)putData:(NSData *)uploadData
+                         metadata:(nullable FIRStorageMetadata *)metadata
+                       completion:(nullable void (^)(FIRStorageMetadata *_Nullable metadata,
+                                                     NSError *_Nullable error))completion;
+
+/**
+ * Asynchronously uploads a file to the currently specified FIRStorageReference,
+ * without additional metadata.
+ * @param fileURL A URL representing the system file path of the object to be uploaded.
+ * @return An instance of FIRStorageUploadTask, which can be used to monitor or manage the upload.
+ */
+- (FIRStorageUploadTask *)putFile:(NSURL *)fileURL;
+
+/**
+ * Asynchronously uploads a file to the currently specified FIRStorageReference.
+ * @param fileURL A URL representing the system file path of the object to be uploaded.
+ * @param metadata FIRStorageMetadata containing additional information (MIME type, etc.)
+ * about the object being uploaded.
+ * @return An instance of FIRStorageUploadTask, which can be used to monitor or manage the upload.
+ */
+- (FIRStorageUploadTask *)putFile:(NSURL *)fileURL metadata:(nullable FIRStorageMetadata *)metadata;
+
+/**
+ * Asynchronously uploads a file to the currently specified FIRStorageReference.
+ * @param fileURL A URL representing the system file path of the object to be uploaded.
+ * @param metadata FIRStorageMetadata containing additional information (MIME type, etc.)
+ * about the object being uploaded.
+ * @param completion A completion block that either returns the object metadata on success,
+ * or an error on failure.
+ * @return An instance of FIRStorageUploadTask, which can be used to monitor or manage the upload.
+ */
+- (FIRStorageUploadTask *)putFile:(NSURL *)fileURL
+                         metadata:(nullable FIRStorageMetadata *)metadata
+                       completion:(nullable void (^)(FIRStorageMetadata *_Nullable metadata,
+                                                     NSError *_Nullable error))completion;
+
+#pragma mark - Downloads
+
+/**
+ * Asynchronously downloads the object at the FIRStorageReference to an NSData object in memory.
+ * An NSData of the provided max size will be allocated, so ensure that the device has enough free
+ * memory to complete the download. For downloading large files, writeToFile may be a better option.
+ * @param size The maximum size in bytes to download. If the download exceeds this size
+ * the task will be cancelled and an error will be returned.
+ * @param completion A completion block that either returns the object data on success,
+ * or an error on failure.
+ * @return An FIRStorageDownloadTask that can be used to monitor or manage the download.
+ */
+- (FIRStorageDownloadTask *)dataWithMaxSize:(int64_t)size
+                                 completion:(void (^)(NSData *_Nullable data,
+                                                      NSError *_Nullable error))completion;
+
+/**
+ * Asynchronously retrieves a long lived download URL with a revokable token.
+ * This can be used to share the file with others, but can be revoked by a developer
+ * in the Firebase Console if desired.
+ * @param completion A completion block that either returns the URL on success,
+ * or an error on failure.
+ */
+- (void)downloadURLWithCompletion:(void (^)(NSURL *_Nullable URL,
+                                            NSError *_Nullable error))completion;
+
+/**
+ * Asynchronously downloads the object at the current path to a specified system filepath.
+ * @param fileURL A file system URL representing the path the object should be downloaded to.
+ * @return An FIRStorageDownloadTask that can be used to monitor or manage the download.
+ */
+- (FIRStorageDownloadTask *)writeToFile:(NSURL *)fileURL;
+
+/**
+ * Asynchronously downloads the object at the current path to a specified system filepath.
+ * @param fileURL A file system URL representing the path the object should be downloaded to.
+ * @param completion A completion block that fires when the file download completes.
+ * Returns an NSURL pointing to the file path of the downloaded file on success,
+ * or an error on failure.
+ * @return An FIRStorageDownloadTask that can be used to monitor or manage the download.
+ */
+- (FIRStorageDownloadTask *)writeToFile:(NSURL *)fileURL
+                             completion:(nullable void (^)(NSURL *_Nullable URL,
+                                                           NSError *_Nullable error))completion;
+
+#pragma mark - Metadata Operations
+
+/**
+ * Retrieves metadata associated with an object at the current path.
+ * @param completion A completion block which returns the object metadata on success,
+ * or an error on failure.
+ */
+- (void)metadataWithCompletion:(void (^)(FIRStorageMetadata *_Nullable metadata,
+                                         NSError *_Nullable error))completion;
+
+/**
+ * Updates the metadata associated with an object at the current path.
+ * @param metadata An FIRStorageMetadata object with the metadata to update.
+ * @param completion A completion block which returns the FIRStorageMetadata on success,
+ * or an error on failure.
+ */
+- (void)updateMetadata:(FIRStorageMetadata *)metadata
+            completion:(nullable void (^)(FIRStorageMetadata *_Nullable metadata,
+                                          NSError *_Nullable error))completion;
+
+#pragma mark - Delete
+
+/**
+ * Deletes the object at the current path.
+ * @param completion A completion block which returns nil on success, or an error on failure.
+ */
+- (void)deleteWithCompletion:(nullable void (^)(NSError *_Nullable error))completion;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageTask.h b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageTask.h
new file mode 100755
index 0000000..8744fcb
--- /dev/null
+++ b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageTask.h
@@ -0,0 +1,66 @@
+// clang-format off
+/** @file FIRStorageTask.h
+    @brief Firebase SDK
+    @copyright Copyright 2016 Google Inc.
+    @remarks Use of this SDK is subject to the Google APIs Terms of Service:
+    https://developers.google.com/terms/
+ */
+// clang-format on
+
+#import <Foundation/Foundation.h>
+
+#import "FIRStorageConstants.h"
+#import "FIRStorageMetadata.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * A superclass to all FIRStorage*Tasks, including FIRStorageUploadTask
+ * and FIRStorageDownloadTask, to provide state transitions, event raising, and common storage
+ * or metadata and errors.
+ * Callbacks are always fired on the developer specified callback queue.
+ * If no queue is specified by the developer, it defaults to the main queue.
+ * Currently not thread safe, so only call methods on the main thread.
+ */
+@interface FIRStorageTask : NSObject
+
+/**
+ * An immutable view of the task and associated metadata, progress, error, etc.
+ */
+@property(strong, readonly, nonatomic, nonnull) FIRStorageTaskSnapshot *snapshot;
+
+@end
+
+/**
+ * Defines task operations such as pause, resume, cancel, and enqueue for all tasks.
+ * All tasks are required to implement enqueue, which begins the task, and may optionally
+ * implement pause, resume, and cancel, which operate on the task to pause, resume, and cancel
+ * operations.
+ */
+@protocol FIRStorageTaskManagement<NSObject>
+
+@required
+/**
+ * Prepares a task and begins execution.
+ */
+- (void)enqueue;
+
+@optional
+/**
+ * Pauses a task currently in progress.
+ */
+- (void)pause;
+
+/**
+ * Cancels a task currently in progress.
+ */
+- (void)cancel;
+
+/**
+ * Resumes a task that is paused.
+ */
+- (void)resume;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageTaskSnapshot.h b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageTaskSnapshot.h
new file mode 100755
index 0000000..5841754
--- /dev/null
+++ b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageTaskSnapshot.h
@@ -0,0 +1,59 @@
+// clang-format off
+/** @file FIRStorageTaskSnapshot.h
+ @brief Firebase SDK
+ @copyright Copyright 2016 Google Inc.
+ @remarks Use of this SDK is subject to the Google APIs Terms of Service:
+ https://developers.google.com/terms/
+ */
+// clang-format on
+
+#import <Foundation/Foundation.h>
+
+#import "FIRStorageConstants.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class FIRStorageMetadata;
+@class FIRStorageReference;
+@class FIRStorageTask;
+
+/**
+ * FIRStorageTaskSnapshot represents an immutable view of a task.
+ * A Snapshot contains a task, storage reference, metadata (if it exists),
+ * progress, and an error (if one occurred).
+ */
+@interface FIRStorageTaskSnapshot : NSObject
+
+/**
+ * Subclass of FIRStorageTask this snapshot represents.
+ */
+@property(readonly, copy, nonatomic) __kindof FIRStorageTask *task;
+
+/**
+ * Metadata returned by the task, or nil if no metadata returned.
+ */
+@property(readonly, copy, nonatomic, nullable) FIRStorageMetadata *metadata;
+
+/**
+ * FIRStorageReference this task is operates on.
+ */
+@property(readonly, copy, nonatomic) FIRStorageReference *reference;
+
+/**
+ * NSProgress object which tracks the progess of an upload or download.
+ */
+@property(readonly, strong, nonatomic, nullable) NSProgress *progress;
+
+/**
+ * Error during task execution, or nil if no error occurred.
+ */
+@property(readonly, copy, nonatomic, nullable) NSError *error;
+
+/**
+ * Status of the task.
+ */
+@property(readonly, nonatomic) FIRStorageTaskStatus status;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageUploadTask.h b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageUploadTask.h
new file mode 100755
index 0000000..27ddc02
--- /dev/null
+++ b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FIRStorageUploadTask.h
@@ -0,0 +1,30 @@
+// clang-format off
+/** @file FIRStorageUploadTask.h
+    @brief Firebase SDK
+    @copyright Copyright 2016 Google Inc.
+    @remarks Use of this SDK is subject to the Google APIs Terms of Service:
+    https://developers.google.com/terms/
+ */
+// clang-format on
+
+#import <Foundation/Foundation.h>
+
+#import "FIRStorageObservableTask.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * FIRStorageUploadTask implements resumable uploads to a file in Firebase Storage.
+ * Uploads can be returned on completion with a completion callback, and can be monitored
+ * by attaching observers, or controlled by calling FIRStorageTask#pause, FIRStorageTask#resume,
+ * or FIRStorageTask#cancel.
+ * Uploads can take NSData in memory, or an NSURL to a file on disk.
+ * Uploads are performed on a background queue, and callbacks are raised on the developer
+ * specified callbackQueue in FIRStorage, or the main queue if left unspecified.
+ * Currently all uploads must be initiated and managed on the main queue.
+ */
+@interface FIRStorageUploadTask : FIRStorageObservableTask<FIRStorageTaskManagement>
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FirebaseStorage.h b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FirebaseStorage.h
new file mode 100755
index 0000000..41825de
--- /dev/null
+++ b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Headers/FirebaseStorage.h
@@ -0,0 +1,21 @@
+// clang-format off
+/** @file FirebaseStorage.m
+    @brief Firebase SDK
+    @copyright Copyright 2016 Google Inc.
+    @remarks Use of this SDK is subject to the Google APIs Terms of Service:
+    https://developers.google.com/terms/
+ */
+// clang-format on
+
+#import "FIRStorage.h"
+#import "FIRStorageConstants.h"
+#import "FIRStorageDownloadTask.h"
+#import "FIRStorageMetadata.h"
+#import "FIRStorageObservableTask.h"
+#import "FIRStorageReference.h"
+#import "FIRStorageTask.h"
+#import "FIRStorageTaskSnapshot.h"
+#import "FIRStorageUploadTask.h"
+
+/** Project version string for FirebaseStorage. */
+FOUNDATION_EXPORT const unsigned char *const FirebaseStorageVersionString;
diff --git a/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Modules/module.modulemap b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Modules/module.modulemap
new file mode 100755
index 0000000..3a256b3
--- /dev/null
+++ b/Example/Pods/FirebaseStorage/Frameworks/frameworks/FirebaseStorage.framework/Modules/module.modulemap
@@ -0,0 +1,18 @@
+framework module FirebaseStorage {
+
+  export *
+
+  umbrella header "FirebaseStorage.h"
+
+  header "FIRStorage.h"
+  header "FIRStorageConstants.h"
+  header "FIRStorageDownloadTask.h"
+  header "FIRStorageMetadata.h"
+  header "FIRStorageObservableTask.h"
+  header "FIRStorageReference.h"
+  header "FIRStorageTask.h"
+  header "FIRStorageTaskSnapshot.h"
+  header "FIRStorageUploadTask.h"
+
+  link framework "MobileCoreServices"
+}
diff --git a/Example/Pods/GTMSessionFetcher/LICENSE b/Example/Pods/GTMSessionFetcher/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/Example/Pods/GTMSessionFetcher/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
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+
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diff --git a/Example/Pods/GTMSessionFetcher/README.md b/Example/Pods/GTMSessionFetcher/README.md
new file mode 100644
index 0000000..9c0d345
--- /dev/null
+++ b/Example/Pods/GTMSessionFetcher/README.md
@@ -0,0 +1,23 @@
+# Google Toolbox for Mac - Session Fetcher #
+
+**Project site** <https://github.com/google/gtm-session-fetcher><br>
+**Discussion group** <http://groups.google.com/group/google-toolbox-for-mac>
+
+[![Build Status](https://travis-ci.org/google/gtm-session-fetcher.svg?branch=master)](https://travis-ci.org/google/gtm-session-fetcher)
+
+`GTMSessionFetcher` makes it easy for Cocoa applications to perform http
+operations. The fetcher is implemented as a wrapper on `NSURLSession`, so its
+behavior is asynchronous and uses operating-system settings on iOS and Mac OS X.
+
+Features include:
+- Simple to build; only one source/header file pair is required
+- Simple to use: takes just two lines of code to fetch a request
+- Supports upload and download sessions
+- Flexible cookie storage
+- Automatic retry on errors, with exponential backoff
+- Support for generating multipart MIME upload streams
+- Easy, convenient logging of http requests and responses
+- Supports plug-in authentication such as with gtm-oauth2
+- Easily testable; self-mocking
+- Automatic rate limiting when created by the `GTMSessionFetcherService` factory class
+- Fully independent of other projects
diff --git a/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcher.h b/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcher.h
new file mode 100644
index 0000000..83d766b
--- /dev/null
+++ b/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcher.h
@@ -0,0 +1,1310 @@
+/* Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// GTMSessionFetcher is a wrapper around NSURLSession for http operations.
+//
+// What does this offer on top of of NSURLSession?
+//
+// - Block-style callbacks for useful functionality like progress rather
+//   than delegate methods.
+// - Out-of-process uploads and downloads using NSURLSession, including
+//   management of fetches after relaunch.
+// - Integration with GTMOAuth2 for invisible management and refresh of
+//   authorization tokens.
+// - Pretty-printed http logging.
+// - Cookies handling that does not interfere with or get interfered with
+//   by WebKit cookies or on Mac by Safari and other apps.
+// - Credentials handling for the http operation.
+// - Rate-limiting and cookie grouping when fetchers are created with
+//   GTMSessionFetcherService.
+//
+// If the bodyData or bodyFileURL property is set, then a POST request is assumed.
+//
+// Each fetcher is assumed to be for a one-shot fetch request; don't reuse the object
+// for a second fetch.
+//
+// The fetcher will be self-retained as long as a connection is pending.
+//
+// To keep user activity private, URLs must have an https scheme (unless the property
+// allowedInsecureSchemes is set to permit the scheme.)
+//
+// Callbacks will be released when the fetch completes or is stopped, so there is no need
+// to use weak self references in the callback blocks.
+//
+// Sample usage:
+//
+//  _fetcherService = [[GTMSessionFetcherService alloc] init];
+//
+//  GTMSessionFetcher *myFetcher = [_fetcherService fetcherWithURLString:myURLString];
+//  myFetcher.retryEnabled = YES;
+//  myFetcher.comment = @"First profile image";
+//
+//  // Optionally specify a file URL or NSData for the request body to upload.
+//  myFetcher.bodyData = [postString dataUsingEncoding:NSUTF8StringEncoding];
+//
+//  [myFetcher beginFetchWithCompletionHandler:^(NSData *data, NSError *error) {
+//    if (error != nil) {
+//      // Server status code or network error.
+//      //
+//      // If the domain is kGTMSessionFetcherStatusDomain then the error code
+//      // is a failure status from the server.
+//    } else {
+//      // Fetch succeeded.
+//    }
+//  }];
+//
+// There is also a beginFetch call that takes a pointer and selector for the completion handler;
+// a pointer and selector is a better style when the callback is a substantial, separate method.
+//
+// NOTE:  Fetches may retrieve data from the server even though the server
+//        returned an error, so the criteria for success is a non-nil error.
+//        The completion handler is called when the server status is >= 300 with an NSError
+//        having domain kGTMSessionFetcherStatusDomain and code set to the server status.
+//
+//        Status codes are at <http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html>
+//
+//
+// Background session support:
+//
+// Out-of-process uploads and downloads may be created by setting the fetcher's
+// useBackgroundSession property. Data to be uploaded should be provided via
+// the uploadFileURL property; the download destination should be specified with
+// the destinationFileURL.  NOTE: Background upload files should be in a location
+// that will be valid even after the device is restarted, so the file should not
+// be uploaded from a system temporary or cache directory.
+//
+// Background session transfers are slower, and should typically be used only
+// for very large downloads or uploads (hundreds of megabytes).
+//
+// When background sessions are used in iOS apps, the application delegate must
+// pass through the parameters from UIApplicationDelegate's
+// application:handleEventsForBackgroundURLSession:completionHandler: to the
+// fetcher class.
+//
+// When the application has been relaunched, it may also create a new fetcher
+// instance to handle completion of the transfers.
+//
+//  - (void)application:(UIApplication *)application
+//      handleEventsForBackgroundURLSession:(NSString *)identifier
+//                        completionHandler:(void (^)())completionHandler {
+//    // Application was re-launched on completing an out-of-process download.
+//
+//    // Pass the URLSession info related to this re-launch to the fetcher class.
+//    [GTMSessionFetcher application:application
+//        handleEventsForBackgroundURLSession:identifier
+//                          completionHandler:completionHandler];
+//
+//    // Get a fetcher related to this re-launch and re-hook up a completionHandler to it.
+//    GTMSessionFetcher *fetcher = [GTMSessionFetcher fetcherWithSessionIdentifier:identifier];
+//    NSURL *destinationFileURL = fetcher.destinationFileURL;
+//    fetcher.completionHandler = ^(NSData *data, NSError *error) {
+//      [self downloadCompletedToFile:destinationFileURL error:error];
+//    };
+//  }
+//
+//
+// Threading and queue support:
+//
+// Networking always happens on a background thread; there is no advantage to
+// changing thread or queue to create or start a fetcher.
+//
+// Callbacks are run on the main thread; alternatively, the app may set the
+// fetcher's callbackQueue to a dispatch queue.
+//
+// Once the fetcher's beginFetch method has been called, the fetcher's methods and
+// properties may be accessed from any thread.
+//
+// Downloading to disk:
+//
+// To have downloaded data saved directly to disk, specify a file URL for the
+// destinationFileURL property.
+//
+// HTTP methods and headers:
+//
+// Alternative HTTP methods, like PUT, and custom headers can be specified by
+// creating the fetcher with an appropriate NSMutableURLRequest.
+//
+//
+// Caching:
+//
+// The fetcher avoids caching. That is best for API requests, but may hurt
+// repeat fetches of static data. Apps may enable a persistent disk cache by
+// customizing the config:
+//
+//  fetcher.configurationBlock = ^(GTMSessionFetcher *configFetcher,
+//                                 NSURLSessionConfiguration *config) {
+//    config.URLCache = [NSURLCache sharedURLCache];
+//  };
+//
+// Or use the standard system config to share cookie storage with web views
+// and to enable disk caching:
+//
+//  fetcher.configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
+//
+//
+// Cookies:
+//
+// There are three supported mechanisms for remembering cookies between fetches.
+//
+// By default, a standalone GTMSessionFetcher uses a mutable array held
+// statically to track cookies for all instantiated fetchers.  This avoids
+// cookies being set by servers for the application from interfering with
+// Safari and WebKit cookie settings, and vice versa.
+// The fetcher cookies are lost when the application quits.
+//
+// To rely instead on WebKit's global NSHTTPCookieStorage, set the fetcher's
+// cookieStorage property:
+//   myFetcher.cookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
+//
+// To share cookies with other apps, use the method introduced in iOS 9/OS X 10.11:
+//   myFetcher.cookieStorage =
+//     [NSHTTPCookieStorage sharedCookieStorageForGroupContainerIdentifier:kMyCompanyContainedID];
+//
+// To ignore existing cookies and only have cookies related to the single fetch
+// be applied, make a temporary cookie storage object:
+//   myFetcher.cookieStorage = [[GTMSessionCookieStorage alloc] init];
+//
+// Note: cookies set while following redirects will be sent to the server, as
+// the redirects are followed by the fetcher.
+//
+// To completely disable cookies, similar to setting cookieStorageMethod to
+// kGTMHTTPFetcherCookieStorageMethodNone, adjust the session configuration
+// appropriately in the fetcher or fetcher service:
+//  fetcher.configurationBlock = ^(GTMSessionFetcher *configFetcher,
+//                                 NSURLSessionConfiguration *config) {
+//    config.HTTPCookieAcceptPolicy = NSHTTPCookieAcceptPolicyNever;
+//    config.HTTPShouldSetCookies = NO;
+//  };
+//
+// If the fetcher is created from a GTMSessionFetcherService object
+// then the cookie storage mechanism is set to use the cookie storage in the
+// service object rather than the static storage. Disabling cookies in the
+// session configuration set on a service object will disable cookies for all
+// fetchers created from that GTMSessionFetcherService object, since the session
+// configuration is propagated to the fetcher.
+//
+//
+// Monitoring data transfers.
+//
+// The fetcher supports a variety of properties for progress monitoring
+// progress with callback blocks.
+//  GTMSessionFetcherSendProgressBlock sendProgressBlock
+//  GTMSessionFetcherReceivedProgressBlock receivedProgressBlock
+//  GTMSessionFetcherDownloadProgressBlock downloadProgressBlock
+//
+// If supplied by the server, the anticipated total download size is available
+// as [[myFetcher response] expectedContentLength] (and may be -1 for unknown
+// download sizes.)
+//
+//
+// Automatic retrying of fetches
+//
+// The fetcher can optionally create a timer and reattempt certain kinds of
+// fetch failures (status codes 408, request timeout; 502, gateway failure;
+// 503, service unavailable; 504, gateway timeout; networking errors
+// NSURLErrorTimedOut and NSURLErrorNetworkConnectionLost.)  The user may
+// set a retry selector to customize the type of errors which will be retried.
+//
+// Retries are done in an exponential-backoff fashion (that is, after 1 second,
+// 2, 4, 8, and so on.)
+//
+// Enabling automatic retries looks like this:
+//  myFetcher.retryEnabled = YES;
+//
+// With retries enabled, the completion callbacks are called only
+// when no more retries will be attempted. Calling the fetcher's stopFetching
+// method will terminate the retry timer, without the finished or failure
+// selectors being invoked.
+//
+// Optionally, the client may set the maximum retry interval:
+//  myFetcher.maxRetryInterval = 60.0; // in seconds; default is 60 seconds
+//                                     // for downloads, 600 for uploads
+//
+// Servers should never send a 400 or 500 status for errors that are retryable
+// by clients, as those values indicate permanent failures. In nearly all
+// cases, the default standard retry behavior is correct for clients, and no
+// custom client retry behavior is needed or appropriate. Servers that send
+// non-retryable status codes and expect the client to retry the request are
+// faulty.
+//
+// Still, the client may provide a block to determine if a status code or other
+// error should be retried. The block returns YES to set the retry timer or NO
+// to fail without additional fetch attempts.
+//
+// The retry method may return the |suggestedWillRetry| argument to get the
+// default retry behavior.  Server status codes are present in the
+// error argument, and have the domain kGTMSessionFetcherStatusDomain. The
+// user's method may look something like this:
+//
+//  myFetcher.retryBlock = ^(BOOL suggestedWillRetry, NSError *error,
+//                           GTMSessionFetcherRetryResponse response) {
+//    // Perhaps examine error.domain and error.code, or fetcher.retryCount
+//    //
+//    // Respond with YES to start the retry timer, NO to proceed to the failure
+//    // callback, or suggestedWillRetry to get default behavior for the
+//    // current error domain and code values.
+//    response(suggestedWillRetry);
+//  };
+
+
+#import <Foundation/Foundation.h>
+
+#if TARGET_OS_IPHONE
+#import <UIKit/UIKit.h>
+#endif
+
+// By default it is stripped from non DEBUG builds. Developers can override
+// this in their project settings.
+#ifndef STRIP_GTM_FETCH_LOGGING
+  #if !DEBUG
+    #define STRIP_GTM_FETCH_LOGGING 1
+  #else
+    #define STRIP_GTM_FETCH_LOGGING 0
+  #endif
+#endif
+
+// Logs in debug builds.
+#ifndef GTMSESSION_LOG_DEBUG
+  #if DEBUG
+    #define GTMSESSION_LOG_DEBUG(...) NSLog(__VA_ARGS__)
+  #else
+    #define GTMSESSION_LOG_DEBUG(...) do { } while (0)
+  #endif
+#endif
+
+// Asserts in debug builds (or logs in debug builds if GTMSESSION_ASSERT_AS_LOG
+// or NS_BLOCK_ASSERTIONS are defined.)
+#ifndef GTMSESSION_ASSERT_DEBUG
+  #if DEBUG && !defined(NS_BLOCK_ASSERTIONS) && !GTMSESSION_ASSERT_AS_LOG
+    #undef GTMSESSION_ASSERT_AS_LOG
+    #define GTMSESSION_ASSERT_AS_LOG 1
+  #endif
+
+  #if DEBUG && !GTMSESSION_ASSERT_AS_LOG
+    #define GTMSESSION_ASSERT_DEBUG(...) NSAssert(__VA_ARGS__)
+  #elif DEBUG
+    #define GTMSESSION_ASSERT_DEBUG(pred, ...) if (!(pred)) { NSLog(__VA_ARGS__); }
+  #else
+    #define GTMSESSION_ASSERT_DEBUG(pred, ...) do { } while (0)
+  #endif
+#endif
+
+// Asserts in debug builds, logs in release builds (or logs in debug builds if
+// GTMSESSION_ASSERT_AS_LOG is defined.)
+#ifndef GTMSESSION_ASSERT_DEBUG_OR_LOG
+  #if DEBUG && !GTMSESSION_ASSERT_AS_LOG
+    #define GTMSESSION_ASSERT_DEBUG_OR_LOG(...) NSAssert(__VA_ARGS__)
+  #else
+    #define GTMSESSION_ASSERT_DEBUG_OR_LOG(pred, ...) if (!(pred)) { NSLog(__VA_ARGS__); }
+  #endif
+#endif
+
+// Macro useful for examining messages from NSURLSession during debugging.
+#if 0
+#define GTM_LOG_SESSION_DELEGATE(...) GTMSESSION_LOG_DEBUG(__VA_ARGS__)
+#else
+#define GTM_LOG_SESSION_DELEGATE(...)
+#endif
+
+#ifndef GTM_NULLABLE
+  #if __has_feature(nullability)  // Available starting in Xcode 6.3
+    #define GTM_NULLABLE_TYPE __nullable
+    #define GTM_NONNULL_TYPE __nonnull
+    #define GTM_NULLABLE nullable
+    #define GTM_NONNULL_DECL nonnull  // GTM_NONNULL is used by GTMDefines.h
+    #define GTM_NULL_RESETTABLE null_resettable
+
+    #define GTM_ASSUME_NONNULL_BEGIN NS_ASSUME_NONNULL_BEGIN
+    #define GTM_ASSUME_NONNULL_END NS_ASSUME_NONNULL_END
+  #else
+    #define GTM_NULLABLE_TYPE
+    #define GTM_NONNULL_TYPE
+    #define GTM_NULLABLE
+    #define GTM_NONNULL_DECL
+    #define GTM_NULL_RESETTABLE
+    #define GTM_ASSUME_NONNULL_BEGIN
+    #define GTM_ASSUME_NONNULL_END
+  #endif  // __has_feature(nullability)
+#endif  // GTM_NULLABLE
+
+#if ((!TARGET_OS_IPHONE && defined(MAC_OS_X_VERSION_10_12) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_12) \
+      || (TARGET_OS_IPHONE && defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0))
+#define GTMSESSION_DEPRECATE_ON_2016_SDKS(_MSG) __attribute__((deprecated("" _MSG)))
+#else
+#define GTMSESSION_DEPRECATE_ON_2016_SDKS(_MSG)
+#endif
+
+#ifndef GTM_DECLARE_GENERICS
+  #if __has_feature(objc_generics) \
+    && ((!TARGET_OS_IPHONE && defined(MAC_OS_X_VERSION_10_11) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_11) \
+      || (TARGET_OS_IPHONE && defined(__IPHONE_9_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_9_0))
+    #define GTM_DECLARE_GENERICS 1
+  #else
+    #define GTM_DECLARE_GENERICS 0
+  #endif
+#endif
+
+#ifndef GTM_NSArrayOf
+  #if GTM_DECLARE_GENERICS
+    #define GTM_NSArrayOf(value) NSArray<value>
+    #define GTM_NSDictionaryOf(key, value) NSDictionary<key, value>
+  #else
+    #define GTM_NSArrayOf(value) NSArray
+    #define GTM_NSDictionaryOf(key, value) NSDictionary
+  #endif // __has_feature(objc_generics)
+#endif  // GTM_NSArrayOf
+
+// For iOS, the fetcher can declare itself a background task to allow fetches
+// to finish when the app leaves the foreground.
+//
+// (This is unrelated to providing a background configuration, which allows
+// out-of-process uploads and downloads.)
+//
+// To disallow use of background tasks during fetches, the target should define
+// GTM_BACKGROUND_TASK_FETCHING to 0, or alternatively may set the
+// skipBackgroundTask property to YES.
+#if TARGET_OS_IPHONE && !defined(GTM_BACKGROUND_TASK_FETCHING)
+  #define GTM_BACKGROUND_TASK_FETCHING 1
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if (!TARGET_OS_IPHONE && defined(MAC_OS_X_VERSION_10_11) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_11) \
+  || (TARGET_OS_IPHONE && defined(__IPHONE_9_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_9_0)
+  #ifndef GTM_USE_SESSION_FETCHER
+    #define GTM_USE_SESSION_FETCHER 1
+  #endif
+
+  #define GTMSESSION_DEPRECATE_OLD_ENUMS 1
+#endif
+
+#if !defined(GTMBridgeFetcher)
+  // These bridge macros should be identical in GTMHTTPFetcher.h and GTMSessionFetcher.h
+  #if GTM_USE_SESSION_FETCHER
+  // Macros to new fetcher class.
+    #define GTMBridgeFetcher GTMSessionFetcher
+    #define GTMBridgeFetcherService GTMSessionFetcherService
+    #define GTMBridgeFetcherServiceProtocol GTMSessionFetcherServiceProtocol
+    #define GTMBridgeAssertValidSelector GTMSessionFetcherAssertValidSelector
+    #define GTMBridgeCookieStorage GTMSessionCookieStorage
+    #define GTMBridgeCleanedUserAgentString GTMFetcherCleanedUserAgentString
+    #define GTMBridgeSystemVersionString GTMFetcherSystemVersionString
+    #define GTMBridgeApplicationIdentifier GTMFetcherApplicationIdentifier
+    #define kGTMBridgeFetcherStatusDomain kGTMSessionFetcherStatusDomain
+    #define kGTMBridgeFetcherStatusBadRequest GTMSessionFetcherStatusBadRequest
+  #else
+    // Macros to old fetcher class.
+    #define GTMBridgeFetcher GTMHTTPFetcher
+    #define GTMBridgeFetcherService GTMHTTPFetcherService
+    #define GTMBridgeFetcherServiceProtocol GTMHTTPFetcherServiceProtocol
+    #define GTMBridgeAssertValidSelector GTMAssertSelectorNilOrImplementedWithArgs
+    #define GTMBridgeCookieStorage GTMCookieStorage
+    #define GTMBridgeCleanedUserAgentString GTMCleanedUserAgentString
+    #define GTMBridgeSystemVersionString GTMSystemVersionString
+    #define GTMBridgeApplicationIdentifier GTMApplicationIdentifier
+    #define kGTMBridgeFetcherStatusDomain kGTMHTTPFetcherStatusDomain
+    #define kGTMBridgeFetcherStatusBadRequest kGTMHTTPFetcherStatusBadRequest
+  #endif  // GTM_USE_SESSION_FETCHER
+#endif
+
+GTM_ASSUME_NONNULL_BEGIN
+
+// Notifications
+//
+// Fetch started and stopped, and fetch retry delay started and stopped.
+extern NSString *const kGTMSessionFetcherStartedNotification;
+extern NSString *const kGTMSessionFetcherStoppedNotification;
+extern NSString *const kGTMSessionFetcherRetryDelayStartedNotification;
+extern NSString *const kGTMSessionFetcherRetryDelayStoppedNotification;
+
+// Completion handler notification. This is intended for use by code capturing
+// and replaying fetch requests and results for testing. For fetches where
+// destinationFileURL or accumulateDataBlock is set for the fetcher, the data
+// will be nil for successful fetches.
+//
+// This notification is posted on the main thread.
+extern NSString *const kGTMSessionFetcherCompletionInvokedNotification;
+extern NSString *const kGTMSessionFetcherCompletionDataKey;
+extern NSString *const kGTMSessionFetcherCompletionErrorKey;
+
+// Constants for NSErrors created by the fetcher (excluding server status errors,
+// and error objects originating in the OS.)
+extern NSString *const kGTMSessionFetcherErrorDomain;
+
+// The fetcher turns server error status values (3XX, 4XX, 5XX) into NSErrors
+// with domain kGTMSessionFetcherStatusDomain.
+//
+// Any server response body data accompanying the status error is added to the
+// userInfo dictionary with key kGTMSessionFetcherStatusDataKey.
+extern NSString *const kGTMSessionFetcherStatusDomain;
+extern NSString *const kGTMSessionFetcherStatusDataKey;
+
+// When a fetch fails with an error, these keys are included in the error userInfo
+// dictionary if retries were attempted.
+extern NSString *const kGTMSessionFetcherNumberOfRetriesDoneKey;
+extern NSString *const kGTMSessionFetcherElapsedIntervalWithRetriesKey;
+
+// Background session support requires access to NSUserDefaults.
+// If [NSUserDefaults standardUserDefaults] doesn't yield the correct NSUserDefaults for your usage,
+// ie for an App Extension, then implement this class/method to return the correct NSUserDefaults.
+// https://developer.apple.com/library/ios/documentation/General/Conceptual/ExtensibilityPG/ExtensionScenarios.html#//apple_ref/doc/uid/TP40014214-CH21-SW6
+@interface GTMSessionFetcherUserDefaultsFactory : NSObject
+
++ (NSUserDefaults *)fetcherUserDefaults;
+
+@end
+
+#ifdef __cplusplus
+}
+#endif
+
+typedef NS_ENUM(NSInteger, GTMSessionFetcherError) {
+  GTMSessionFetcherErrorDownloadFailed = -1,
+  GTMSessionFetcherErrorUploadChunkUnavailable = -2,
+  GTMSessionFetcherErrorBackgroundExpiration = -3,
+  GTMSessionFetcherErrorBackgroundFetchFailed = -4,
+  GTMSessionFetcherErrorInsecureRequest = -5,
+  GTMSessionFetcherErrorTaskCreationFailed = -6,
+};
+
+typedef NS_ENUM(NSInteger, GTMSessionFetcherStatus) {
+  // Standard http status codes.
+  GTMSessionFetcherStatusNotModified = 304,
+  GTMSessionFetcherStatusBadRequest = 400,
+  GTMSessionFetcherStatusUnauthorized = 401,
+  GTMSessionFetcherStatusForbidden = 403,
+  GTMSessionFetcherStatusPreconditionFailed = 412
+};
+
+#if !GTMSESSION_DEPRECATE_OLD_ENUMS
+#define kGTMSessionFetcherErrorDownloadFailed         GTMSessionFetcherErrorDownloadFailed
+#define kGTMSessionFetcherErrorUploadChunkUnavailable GTMSessionFetcherErrorUploadChunkUnavailable
+#define kGTMSessionFetcherErrorBackgroundExpiration   GTMSessionFetcherErrorBackgroundExpiration
+#define kGTMSessionFetcherErrorBackgroundFetchFailed  GTMSessionFetcherErrorBackgroundFetchFailed
+#define kGTMSessionFetcherErrorInsecureRequest        GTMSessionFetcherErrorInsecureRequest
+#define kGTMSessionFetcherErrorTaskCreationFailed     GTMSessionFetcherErrorTaskCreationFailed
+
+#define kGTMSessionFetcherStatusNotModified        GTMSessionFetcherStatusNotModified
+#define kGTMSessionFetcherStatusBadRequest         GTMSessionFetcherStatusBadRequest
+#define kGTMSessionFetcherStatusUnauthorized       GTMSessionFetcherStatusUnauthorized
+#define kGTMSessionFetcherStatusForbidden          GTMSessionFetcherStatusForbidden
+#define kGTMSessionFetcherStatusPreconditionFailed GTMSessionFetcherStatusPreconditionFailed
+#endif  // !GTMSESSION_DEPRECATE_OLD_ENUMS
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+@class GTMSessionCookieStorage;
+@class GTMSessionFetcher;
+
+// The configuration block is for modifying the NSURLSessionConfiguration only.
+// DO NOT change any fetcher properties in the configuration block.
+typedef void (^GTMSessionFetcherConfigurationBlock)(GTMSessionFetcher *fetcher,
+                                                    NSURLSessionConfiguration *configuration);
+typedef void (^GTMSessionFetcherSystemCompletionHandler)(void);
+typedef void (^GTMSessionFetcherCompletionHandler)(NSData * GTM_NULLABLE_TYPE data,
+                                                   NSError * GTM_NULLABLE_TYPE error);
+typedef void (^GTMSessionFetcherBodyStreamProviderResponse)(NSInputStream *bodyStream);
+typedef void (^GTMSessionFetcherBodyStreamProvider)(GTMSessionFetcherBodyStreamProviderResponse response);
+typedef void (^GTMSessionFetcherDidReceiveResponseDispositionBlock)(NSURLSessionResponseDisposition disposition);
+typedef void (^GTMSessionFetcherDidReceiveResponseBlock)(NSURLResponse *response,
+                                                         GTMSessionFetcherDidReceiveResponseDispositionBlock dispositionBlock);
+typedef void (^GTMSessionFetcherChallengeDispositionBlock)(NSURLSessionAuthChallengeDisposition disposition,
+                                                           NSURLCredential * GTM_NULLABLE_TYPE credential);
+typedef void (^GTMSessionFetcherChallengeBlock)(GTMSessionFetcher *fetcher,
+                                                NSURLAuthenticationChallenge *challenge,
+                                                GTMSessionFetcherChallengeDispositionBlock dispositionBlock);
+typedef void (^GTMSessionFetcherWillRedirectResponse)(NSURLRequest * GTM_NULLABLE_TYPE redirectedRequest);
+typedef void (^GTMSessionFetcherWillRedirectBlock)(NSHTTPURLResponse *redirectResponse,
+                                                   NSURLRequest *redirectRequest,
+                                                   GTMSessionFetcherWillRedirectResponse response);
+typedef void (^GTMSessionFetcherAccumulateDataBlock)(NSData * GTM_NULLABLE_TYPE buffer);
+typedef void (^GTMSessionFetcherReceivedProgressBlock)(int64_t bytesWritten,
+                                                       int64_t totalBytesWritten);
+typedef void (^GTMSessionFetcherDownloadProgressBlock)(int64_t bytesWritten,
+                                                       int64_t totalBytesWritten,
+                                                       int64_t totalBytesExpectedToWrite);
+typedef void (^GTMSessionFetcherSendProgressBlock)(int64_t bytesSent,
+                                                   int64_t totalBytesSent,
+                                                   int64_t totalBytesExpectedToSend);
+typedef void (^GTMSessionFetcherWillCacheURLResponseResponse)(NSCachedURLResponse * GTM_NULLABLE_TYPE cachedResponse);
+typedef void (^GTMSessionFetcherWillCacheURLResponseBlock)(NSCachedURLResponse *proposedResponse,
+                                                           GTMSessionFetcherWillCacheURLResponseResponse responseBlock);
+typedef void (^GTMSessionFetcherRetryResponse)(BOOL shouldRetry);
+typedef void (^GTMSessionFetcherRetryBlock)(BOOL suggestedWillRetry,
+                                            NSError * GTM_NULLABLE_TYPE error,
+                                            GTMSessionFetcherRetryResponse response);
+
+typedef void (^GTMSessionFetcherTestResponse)(NSHTTPURLResponse * GTM_NULLABLE_TYPE response,
+                                              NSData * GTM_NULLABLE_TYPE data,
+                                              NSError * GTM_NULLABLE_TYPE error);
+typedef void (^GTMSessionFetcherTestBlock)(GTMSessionFetcher *fetcherToTest,
+                                           GTMSessionFetcherTestResponse testResponse);
+
+void GTMSessionFetcherAssertValidSelector(id GTM_NULLABLE_TYPE obj, SEL GTM_NULLABLE_TYPE sel, ...);
+
+// Utility functions for applications self-identifying to servers via a
+// user-agent header
+
+// The "standard" user agent includes the application identifier, taken from the bundle,
+// followed by a space and the system version string. Pass nil to use +mainBundle as the source
+// of the bundle identifier.
+//
+// Applications may use this as a starting point for their own user agent strings, perhaps
+// with additional sections appended.  Use GTMFetcherCleanedUserAgentString() below to
+// clean up any string being added to the user agent.
+NSString *GTMFetcherStandardUserAgentString(NSBundle * GTM_NULLABLE_TYPE bundle);
+
+// Make a generic name and version for the current application, like
+// com.example.MyApp/1.2.3 relying on the bundle identifier and the
+// CFBundleShortVersionString or CFBundleVersion.
+//
+// The bundle ID may be overridden as the base identifier string by
+// adding to the bundle's Info.plist a "GTMUserAgentID" key.
+//
+// If no bundle ID or override is available, the process name preceded
+// by "proc_" is used.
+NSString *GTMFetcherApplicationIdentifier(NSBundle * GTM_NULLABLE_TYPE bundle);
+
+// Make an identifier like "MacOSX/10.7.1" or "iPod_Touch/4.1 hw/iPod1_1"
+NSString *GTMFetcherSystemVersionString(void);
+
+// Make a parseable user-agent identifier from the given string, replacing whitespace
+// and commas with underscores, and removing other characters that may interfere
+// with parsing of the full user-agent string.
+//
+// For example, @"[My App]" would become @"My_App"
+NSString *GTMFetcherCleanedUserAgentString(NSString *str);
+
+// Grab the data from an input stream. Since streams cannot be assumed to be rewindable,
+// this may be destructive; the caller can try to rewind the stream (by setting the
+// NSStreamFileCurrentOffsetKey property) or can just use the NSData to make a new
+// NSInputStream. This function is intended to facilitate testing rather than be used in
+// production.
+//
+// This function operates synchronously on the current thread. Depending on how the
+// input stream is implemented, it may be appropriate to dispatch to a different
+// queue before calling this function.
+//
+// Failure is indicated by a returned data value of nil.
+NSData * GTM_NULLABLE_TYPE GTMDataFromInputStream(NSInputStream *inputStream, NSError **outError);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+
+#if !GTM_USE_SESSION_FETCHER
+@protocol GTMHTTPFetcherServiceProtocol;
+#endif
+
+// This protocol allows abstract references to the fetcher service, primarily for
+// fetchers (which may be compiled without the fetcher service class present.)
+//
+// Apps should not need to use this protocol.
+@protocol GTMSessionFetcherServiceProtocol <NSObject>
+// This protocol allows us to call into the service without requiring
+// GTMSessionFetcherService sources in this project
+
+@property(atomic, strong) dispatch_queue_t callbackQueue;
+
+- (BOOL)fetcherShouldBeginFetching:(GTMSessionFetcher *)fetcher;
+- (void)fetcherDidCreateSession:(GTMSessionFetcher *)fetcher;
+- (void)fetcherDidBeginFetching:(GTMSessionFetcher *)fetcher;
+- (void)fetcherDidStop:(GTMSessionFetcher *)fetcher;
+
+- (GTMSessionFetcher *)fetcherWithRequest:(NSURLRequest *)request;
+- (BOOL)isDelayingFetcher:(GTMSessionFetcher *)fetcher;
+
+@property(atomic, assign) BOOL reuseSession;
+- (GTM_NULLABLE NSURLSession *)session;
+- (GTM_NULLABLE NSURLSession *)sessionForFetcherCreation;
+- (GTM_NULLABLE id<NSURLSessionDelegate>)sessionDelegate;
+- (GTM_NULLABLE NSDate *)stoppedAllFetchersDate;
+
+// Methods for compatibility with the old GTMHTTPFetcher.
+@property(readonly, strong, GTM_NULLABLE) NSOperationQueue *delegateQueue;
+
+@end  // @protocol GTMSessionFetcherServiceProtocol
+
+#ifndef GTM_FETCHER_AUTHORIZATION_PROTOCOL
+#define GTM_FETCHER_AUTHORIZATION_PROTOCOL 1
+@protocol GTMFetcherAuthorizationProtocol <NSObject>
+@required
+// This protocol allows us to call the authorizer without requiring its sources
+// in this project.
+- (void)authorizeRequest:(GTM_NULLABLE NSMutableURLRequest *)request
+                delegate:(id)delegate
+       didFinishSelector:(SEL)sel;
+
+- (void)stopAuthorization;
+
+- (void)stopAuthorizationForRequest:(NSURLRequest *)request;
+
+- (BOOL)isAuthorizingRequest:(NSURLRequest *)request;
+
+- (BOOL)isAuthorizedRequest:(NSURLRequest *)request;
+
+@property(strong, readonly, GTM_NULLABLE) NSString *userEmail;
+
+@optional
+
+// Indicate if authorization may be attempted. Even if this succeeds,
+// authorization may fail if the user's permissions have been revoked.
+@property(readonly) BOOL canAuthorize;
+
+// For development only, allow authorization of non-SSL requests, allowing
+// transmission of the bearer token unencrypted.
+@property(assign) BOOL shouldAuthorizeAllRequests;
+
+- (void)authorizeRequest:(GTM_NULLABLE NSMutableURLRequest *)request
+       completionHandler:(void (^)(NSError * GTM_NULLABLE_TYPE error))handler;
+
+#if GTM_USE_SESSION_FETCHER
+@property (weak, GTM_NULLABLE) id<GTMSessionFetcherServiceProtocol> fetcherService;
+#else
+@property (weak, GTM_NULLABLE) id<GTMHTTPFetcherServiceProtocol> fetcherService;
+#endif
+
+- (BOOL)primeForRefresh;
+
+@end
+#endif  // GTM_FETCHER_AUTHORIZATION_PROTOCOL
+
+#if TARGET_OS_IPHONE
+// A protocol for an alternative target for messages from GTMSessionFetcher to UIApplication.
+// Set the target using +[GTMSessionFetcher setSubstituteUIApplication:]
+@protocol GTMUIApplicationProtocol <NSObject>
+- (UIBackgroundTaskIdentifier)beginBackgroundTaskWithName:(nullable NSString *)taskName
+                                        expirationHandler:(void(^ __nullable)(void))handler;
+- (void)endBackgroundTask:(UIBackgroundTaskIdentifier)identifier;
+@end
+#endif
+
+#pragma mark -
+
+// GTMSessionFetcher objects are used for async retrieval of an http get or post
+//
+// See additional comments at the beginning of this file
+@interface GTMSessionFetcher : NSObject <NSURLSessionDelegate>
+
+// Create a fetcher
+//
+// fetcherWithRequest will return an autoreleased fetcher, but if
+// the connection is successfully created, the connection should retain the
+// fetcher for the life of the connection as well. So the caller doesn't have
+// to retain the fetcher explicitly unless they want to be able to cancel it.
++ (instancetype)fetcherWithRequest:(GTM_NULLABLE NSURLRequest *)request;
+
+// Convenience methods that make a request, like +fetcherWithRequest
++ (instancetype)fetcherWithURL:(NSURL *)requestURL;
++ (instancetype)fetcherWithURLString:(NSString *)requestURLString;
+
+// Methods for creating fetchers to continue previous fetches.
++ (instancetype)fetcherWithDownloadResumeData:(NSData *)resumeData;
++ (GTM_NULLABLE instancetype)fetcherWithSessionIdentifier:(NSString *)sessionIdentifier;
+
+// Returns an array of currently active fetchers for background sessions,
+// both restarted and newly created ones.
++ (GTM_NSArrayOf(GTMSessionFetcher *) *)fetchersForBackgroundSessions;
+
+// Designated initializer.
+//
+// Applications should create fetchers with a "fetcherWith..." method on a fetcher
+// service or a class method, not with this initializer.
+//
+// The configuration should typically be nil. Applications needing to customize
+// the configuration may do so by setting the configurationBlock property.
+- (instancetype)initWithRequest:(GTM_NULLABLE NSURLRequest *)request
+                  configuration:(GTM_NULLABLE NSURLSessionConfiguration *)configuration;
+
+// The fetcher's request.  This may not be set after beginFetch has been invoked. The request
+// may change due to redirects.
+@property(strong, GTM_NULLABLE) NSURLRequest *request;
+
+// Set a header field value on the request. Header field value changes will not
+// affect a fetch after the fetch has begun.
+- (void)setRequestValue:(GTM_NULLABLE NSString *)value forHTTPHeaderField:(NSString *)field;
+
+// The fetcher's request (deprecated.)
+//
+// Exposing a mutable object in the interface was convenient but a bad design decision due
+// to thread-safety requirements.  Clients should use the request property and
+// setRequestValue:forHTTPHeaderField: instead.
+@property(atomic, readonly, GTM_NULLABLE) NSMutableURLRequest *mutableRequest
+    GTMSESSION_DEPRECATE_ON_2016_SDKS("use 'request' or '-setRequestValue:forHTTPHeaderField:'");
+
+// Data used for resuming a download task.
+@property(atomic, readonly, GTM_NULLABLE) NSData *downloadResumeData;
+
+// The configuration; this must be set before the fetch begins. If no configuration is
+// set or inherited from the fetcher service, then the fetcher uses an ephemeral config.
+//
+// NOTE: This property should typically be nil. Applications needing to customize
+// the configuration should do so by setting the configurationBlock property.
+// That allows the fetcher to pick an appropriate base configuration, with the
+// application setting only the configuration properties it needs to customize.
+@property(atomic, strong, GTM_NULLABLE) NSURLSessionConfiguration *configuration;
+
+// A block the client may use to customize the configuration used to create the session.
+//
+// This is called synchronously, either on the thread that begins the fetch or, during a retry,
+// on the main thread. The configuration block may be called repeatedly if multiple fetchers are
+// created.
+//
+// The configuration block is for modifying the NSURLSessionConfiguration only.
+// DO NOT change any fetcher properties in the configuration block. Fetcher properties
+// may be set in the fetcher service prior to fetcher creation, or on the fetcher prior
+// to invoking beginFetch.
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherConfigurationBlock configurationBlock;
+
+// A session is created as needed by the fetcher.  A fetcher service object
+// may maintain sessions for multiple fetches to the same host.
+@property(atomic, strong, GTM_NULLABLE) NSURLSession *session;
+
+// The task in flight.
+@property(atomic, readonly, GTM_NULLABLE) NSURLSessionTask *sessionTask;
+
+// The background session identifier.
+@property(atomic, readonly, GTM_NULLABLE) NSString *sessionIdentifier;
+
+// Indicates a fetcher created to finish a background session task.
+@property(atomic, readonly) BOOL wasCreatedFromBackgroundSession;
+
+// Additional user-supplied data to encode into the session identifier. Since session identifier
+// length limits are unspecified, this should be kept small. Key names beginning with an underscore
+// are reserved for use by the fetcher.
+@property(atomic, strong, GTM_NULLABLE) GTM_NSDictionaryOf(NSString *, NSString *) *sessionUserInfo;
+
+// The human-readable description to be assigned to the task.
+@property(atomic, copy, GTM_NULLABLE) NSString *taskDescription;
+
+// The priority assigned to the task, if any.  Use NSURLSessionTaskPriorityLow,
+// NSURLSessionTaskPriorityDefault, or NSURLSessionTaskPriorityHigh.
+@property(atomic, assign) float taskPriority;
+
+// The fetcher encodes information used to resume a session in the session identifier.
+// This method, intended for internal use returns the encoded information.  The sessionUserInfo
+// dictionary is stored as identifier metadata.
+- (GTM_NULLABLE GTM_NSDictionaryOf(NSString *, NSString *) *)sessionIdentifierMetadata;
+
+#if TARGET_OS_IPHONE
+// The app should pass to this method the completion handler passed in the app delegate method
+// application:handleEventsForBackgroundURLSession:completionHandler:
++ (void)application:(UIApplication *)application
+    handleEventsForBackgroundURLSession:(NSString *)identifier
+                      completionHandler:(GTMSessionFetcherSystemCompletionHandler)completionHandler;
+#endif
+
+// Indicate that a newly created session should be a background session.
+// A new session identifier will be created by the fetcher.
+//
+// Warning:  The only thing background sessions are for is rare download
+// of huge, batched files of data. And even just for those, there's a lot
+// of pain and hackery needed to get transfers to actually happen reliably
+// with background sessions.
+//
+// Don't try to upload or download in many background sessions, since the system
+// will impose an exponentially increasing time penalty to prevent the app from
+// getting too much background execution time.
+//
+// References:
+//
+//   "Moving to Fewer, Larger Transfers"
+//   https://forums.developer.apple.com/thread/14853
+//
+//   "NSURLSession’s Resume Rate Limiter"
+//   https://forums.developer.apple.com/thread/14854
+//
+//   "Background Session Task state persistence"
+//   https://forums.developer.apple.com/thread/11554
+//
+@property(assign) BOOL useBackgroundSession;
+
+// Indicates if the fetcher was started using a background session.
+@property(atomic, readonly, getter=isUsingBackgroundSession) BOOL usingBackgroundSession;
+
+// Indicates if uploads should use an upload task.  This is always set for file or stream-provider
+// bodies, but may be set explicitly for NSData bodies.
+@property(atomic, assign) BOOL useUploadTask;
+
+// Indicates that the fetcher is using a session that may be shared with other fetchers.
+@property(atomic, readonly) BOOL canShareSession;
+
+// By default, the fetcher allows only secure (https) schemes unless this
+// property is set, or the GTM_ALLOW_INSECURE_REQUESTS build flag is set.
+//
+// For example, during debugging when fetching from a development server that lacks SSL support,
+// this may be set to @[ @"http" ], or when the fetcher is used to retrieve local files,
+// this may be set to @[ @"file" ].
+//
+// This should be left as nil for release builds to avoid creating the opportunity for
+// leaking private user behavior and data.  If a server is providing insecure URLs
+// for fetching by the client app, report the problem as server security & privacy bug.
+//
+// For builds with the iOS 9/OS X 10.11 and later SDKs, this property is required only when
+// the app specifies NSAppTransportSecurity/NSAllowsArbitraryLoads in the main bundle's Info.plist.
+@property(atomic, copy, GTM_NULLABLE) GTM_NSArrayOf(NSString *) *allowedInsecureSchemes;
+
+// By default, the fetcher prohibits localhost requests unless this property is set,
+// or the GTM_ALLOW_INSECURE_REQUESTS build flag is set.
+//
+// For localhost requests, the URL scheme is not checked  when this property is set.
+//
+// For builds with the iOS 9/OS X 10.11 and later SDKs, this property is required only when
+// the app specifies NSAppTransportSecurity/NSAllowsArbitraryLoads in the main bundle's Info.plist.
+@property(atomic, assign) BOOL allowLocalhostRequest;
+
+// By default, the fetcher requires valid server certs.  This may be bypassed
+// temporarily for development against a test server with an invalid cert.
+@property(atomic, assign) BOOL allowInvalidServerCertificates;
+
+// Cookie storage object for this fetcher. If nil, the fetcher will use a static cookie
+// storage instance shared among fetchers. If this fetcher was created by a fetcher service
+// object, it will be set to use the service object's cookie storage. See Cookies section above for
+// the full discussion.
+//
+// Because as of Jan 2014 standalone instances of NSHTTPCookieStorage do not actually
+// store any cookies (Radar 15735276) we use our own subclass, GTMSessionCookieStorage,
+// to hold cookies in memory.
+@property(atomic, strong, GTM_NULLABLE) NSHTTPCookieStorage *cookieStorage;
+
+// Setting the credential is optional; it is used if the connection receives
+// an authentication challenge.
+@property(atomic, strong, GTM_NULLABLE) NSURLCredential *credential;
+
+// Setting the proxy credential is optional; it is used if the connection
+// receives an authentication challenge from a proxy.
+@property(atomic, strong, GTM_NULLABLE) NSURLCredential *proxyCredential;
+
+// If body data, body file URL, or body stream provider is not set, then a GET request
+// method is assumed.
+@property(atomic, strong, GTM_NULLABLE) NSData *bodyData;
+
+// File to use as the request body. This forces use of an upload task.
+@property(atomic, strong, GTM_NULLABLE) NSURL *bodyFileURL;
+
+// Length of body to send, expected or actual.
+@property(atomic, readonly) int64_t bodyLength;
+
+// The body stream provider may be called repeatedly to provide a body.
+// Setting a body stream provider forces use of an upload task.
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherBodyStreamProvider bodyStreamProvider;
+
+// Object to add authorization to the request, if needed.
+//
+// This may not be changed once beginFetch has been invoked.
+@property(atomic, strong, GTM_NULLABLE) id<GTMFetcherAuthorizationProtocol> authorizer;
+
+// The service object that created and monitors this fetcher, if any.
+@property(atomic, strong) id<GTMSessionFetcherServiceProtocol> service;
+
+// The host, if any, used to classify this fetcher in the fetcher service.
+@property(atomic, copy, GTM_NULLABLE) NSString *serviceHost;
+
+// The priority, if any, used for starting fetchers in the fetcher service.
+//
+// Lower values are higher priority; the default is 0, and values may
+// be negative or positive. This priority affects only the start order of
+// fetchers that are being delayed by a fetcher service when the running fetchers
+// exceeds the service's maxRunningFetchersPerHost.  A priority of NSIntegerMin will
+// exempt this fetcher from delay.
+@property(atomic, assign) NSInteger servicePriority;
+
+// The delegate's optional didReceiveResponse block may be used to inspect or alter
+// the session task response.
+//
+// This is called on the callback queue.
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherDidReceiveResponseBlock didReceiveResponseBlock;
+
+// The delegate's optional challenge block may be used to inspect or alter
+// the session task challenge.
+//
+// If this block is not set, the fetcher's default behavior for the NSURLSessionTask
+// didReceiveChallenge: delegate method is to use the fetcher's respondToChallenge: method
+// which relies on the fetcher's credential and proxyCredential properties.
+//
+// Warning: This may be called repeatedly if the challenge fails. Check
+// challenge.previousFailureCount to identify repeated invocations.
+//
+// This is called on the callback queue.
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherChallengeBlock challengeBlock;
+
+// The delegate's optional willRedirect block may be used to inspect or alter
+// the redirection.
+//
+// This is called on the callback queue.
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherWillRedirectBlock willRedirectBlock;
+
+// The optional send progress block reports body bytes uploaded.
+//
+// This is called on the callback queue.
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherSendProgressBlock sendProgressBlock;
+
+// The optional accumulate block may be set by clients wishing to accumulate data
+// themselves rather than let the fetcher append each buffer to an NSData.
+//
+// When this is called with nil data (such as on redirect) the client
+// should empty its accumulation buffer.
+//
+// This is called on the callback queue.
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherAccumulateDataBlock accumulateDataBlock;
+
+// The optional received progress block may be used to monitor data
+// received from a data task.
+//
+// This is called on the callback queue.
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherReceivedProgressBlock receivedProgressBlock;
+
+// The delegate's optional downloadProgress block may be used to monitor download
+// progress in writing to disk.
+//
+// This is called on the callback queue.
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherDownloadProgressBlock downloadProgressBlock;
+
+// The delegate's optional willCacheURLResponse block may be used to alter the cached
+// NSURLResponse. The user may prevent caching by passing nil to the block's response.
+//
+// This is called on the callback queue.
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherWillCacheURLResponseBlock willCacheURLResponseBlock;
+
+// Enable retrying; see comments at the top of this file.  Setting
+// retryEnabled=YES resets the min and max retry intervals.
+@property(atomic, assign, getter=isRetryEnabled) BOOL retryEnabled;
+
+// Retry block is optional for retries.
+//
+// If present, this block should call the response block with YES to cause a retry or NO to end the
+// fetch.
+// See comments at the top of this file.
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherRetryBlock retryBlock;
+
+// Retry intervals must be strictly less than maxRetryInterval, else
+// they will be limited to maxRetryInterval and no further retries will
+// be attempted.  Setting maxRetryInterval to 0.0 will reset it to the
+// default value, 60 seconds for downloads and 600 seconds for uploads.
+@property(atomic, assign) NSTimeInterval maxRetryInterval;
+
+// Starting retry interval.  Setting minRetryInterval to 0.0 will reset it
+// to a random value between 1.0 and 2.0 seconds.  Clients should normally not
+// set this except for unit testing.
+@property(atomic, assign) NSTimeInterval minRetryInterval;
+
+// Multiplier used to increase the interval between retries, typically 2.0.
+// Clients should not need to set this.
+@property(atomic, assign) double retryFactor;
+
+// Number of retries attempted.
+@property(atomic, readonly) NSUInteger retryCount;
+
+// Interval delay to precede next retry.
+@property(atomic, readonly) NSTimeInterval nextRetryInterval;
+
+#if GTM_BACKGROUND_TASK_FETCHING
+// Skip use of a UIBackgroundTask, thus requiring fetches to complete when the app is in the
+// foreground.
+//
+// Targets should define GTM_BACKGROUND_TASK_FETCHING to 0 to avoid use of a UIBackgroundTask
+// on iOS to allow fetches to complete in the background.  This property is available when
+// it's not practical to set the preprocessor define.
+@property(atomic, assign) BOOL skipBackgroundTask;
+#endif  // GTM_BACKGROUND_TASK_FETCHING
+
+// Begin fetching the request
+//
+// The delegate may optionally implement the callback or pass nil for the selector or handler.
+//
+// The delegate and all callback blocks are retained between the beginFetch call until after the
+// finish callback, or until the fetch is stopped.
+//
+// An error is passed to the callback for server statuses 300 or
+// higher, with the status stored as the error object's code.
+//
+// finishedSEL has a signature like:
+//   - (void)fetcher:(GTMSessionFetcher *)fetcher
+//  finishedWithData:(NSData *)data
+//             error:(NSError *)error;
+//
+// If the application has specified a destinationFileURL or an accumulateDataBlock
+// for the fetcher, the data parameter passed to the callback will be nil.
+
+- (void)beginFetchWithDelegate:(GTM_NULLABLE id)delegate
+             didFinishSelector:(GTM_NULLABLE SEL)finishedSEL;
+
+- (void)beginFetchWithCompletionHandler:(GTM_NULLABLE GTMSessionFetcherCompletionHandler)handler;
+
+// Returns YES if this fetcher is in the process of fetching a URL.
+@property(atomic, readonly, getter=isFetching) BOOL fetching;
+
+// Cancel the fetch of the request that's currently in progress.  The completion handler
+// will not be called.
+- (void)stopFetching;
+
+// A block to be called when the fetch completes.
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherCompletionHandler completionHandler;
+
+// A block to be called if download resume data becomes available.
+@property(atomic, strong, GTM_NULLABLE) void (^resumeDataBlock)(NSData *);
+
+// Return the status code from the server response.
+@property(atomic, readonly) NSInteger statusCode;
+
+// Return the http headers from the response.
+@property(atomic, strong, readonly, GTM_NULLABLE) GTM_NSDictionaryOf(NSString *, NSString *) *responseHeaders;
+
+// The response, once it's been received.
+@property(atomic, strong, readonly, GTM_NULLABLE) NSURLResponse *response;
+
+// Bytes downloaded so far.
+@property(atomic, readonly) int64_t downloadedLength;
+
+// Buffer of currently-downloaded data, if available.
+@property(atomic, readonly, strong, GTM_NULLABLE) NSData *downloadedData;
+
+// Local path to which the downloaded file will be moved.
+//
+// If a file already exists at the path, it will be overwritten.
+// Will create the enclosing folders if they are not present.
+@property(atomic, strong, GTM_NULLABLE) NSURL *destinationFileURL;
+
+// The time this fetcher originally began fetching. This is useful as a time
+// barrier for ignoring irrelevant fetch notifications or callbacks.
+@property(atomic, strong, readonly, GTM_NULLABLE) NSDate *initialBeginFetchDate;
+
+// userData is retained solely for the convenience of the client.
+@property(atomic, strong, GTM_NULLABLE) id userData;
+
+// Stored property values are retained solely for the convenience of the client.
+@property(atomic, copy, GTM_NULLABLE) GTM_NSDictionaryOf(NSString *, id) *properties;
+
+- (void)setProperty:(GTM_NULLABLE id)obj forKey:(NSString *)key;  // Pass nil for obj to remove the property.
+- (GTM_NULLABLE id)propertyForKey:(NSString *)key;
+
+- (void)addPropertiesFromDictionary:(GTM_NSDictionaryOf(NSString *, id) *)dict;
+
+// Comments are useful for logging, so are strongly recommended for each fetcher.
+@property(atomic, copy, GTM_NULLABLE) NSString *comment;
+
+- (void)setCommentWithFormat:(NSString *)format, ... NS_FORMAT_FUNCTION(1, 2);
+
+// Log of request and response, if logging is enabled
+@property(atomic, copy, GTM_NULLABLE) NSString *log;
+
+// Callbacks are run on this queue.  If none is supplied, the main queue is used.
+@property(atomic, strong, GTM_NULL_RESETTABLE) dispatch_queue_t callbackQueue;
+
+// The queue used internally by the session to invoke its delegate methods in the fetcher.
+//
+// Application callbacks are always called by the fetcher on the callbackQueue above,
+// not on this queue. Apps should generally not change this queue.
+//
+// The default delegate queue is the main queue.
+//
+// This value is ignored after the session has been created, so this
+// property should be set in the fetcher service rather in the fetcher as it applies
+// to a shared session.
+@property(atomic, strong, GTM_NULL_RESETTABLE) NSOperationQueue *sessionDelegateQueue;
+
+// Spin the run loop or sleep the thread, discarding events, until the fetch has completed.
+//
+// This is only for use in testing or in tools without a user interface.
+//
+// Note:  Synchronous fetches should never be used by shipping apps; they are
+// sufficient reason for rejection from the app store.
+//
+// Returns NO if timed out.
+- (BOOL)waitForCompletionWithTimeout:(NSTimeInterval)timeoutInSeconds;
+
+// Test block is optional for testing.
+//
+// If present, this block will cause the fetcher to skip starting the session, and instead
+// use the test block response values when calling the completion handler and delegate code.
+//
+// Test code can set this on the fetcher or on the fetcher service.  For testing libraries
+// that use a fetcher without exposing either the fetcher or the fetcher service, the global
+// method setGlobalTestBlock: will set the block for all fetchers that do not have a test
+// block set.
+//
+// The test code can pass nil for all response parameters to indicate that the fetch
+// should proceed.
+//
+// Applications can exclude test block support by setting GTM_DISABLE_FETCHER_TEST_BLOCK.
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherTestBlock testBlock;
+
++ (void)setGlobalTestBlock:(GTM_NULLABLE GTMSessionFetcherTestBlock)block;
+
+#if TARGET_OS_IPHONE
+// For testing or to override UIApplication invocations, apps may specify an alternative
+// target for messages to UIApplication.
++ (void)setSubstituteUIApplication:(nullable id<GTMUIApplicationProtocol>)substituteUIApplication;
++ (nullable id<GTMUIApplicationProtocol>)substituteUIApplication;
+#endif  // TARGET_OS_IPHONE
+
+// Exposed for testing.
++ (GTMSessionCookieStorage *)staticCookieStorage;
++ (BOOL)appAllowsInsecureRequests;
+
+#if STRIP_GTM_FETCH_LOGGING
+// If logging is stripped, provide a stub for the main method
+// for controlling logging.
++ (void)setLoggingEnabled:(BOOL)flag;
++ (BOOL)isLoggingEnabled;
+
+#else
+
+// These methods let an application log specific body text, such as the text description of a binary
+// request or response. The application should set the fetcher to defer response body logging until
+// the response has been received and the log response body has been set by the app. For example:
+//
+//   fetcher.logRequestBody = [binaryObject stringDescription];
+//   fetcher.deferResponseBodyLogging = YES;
+//   [fetcher beginFetchWithCompletionHandler:^(NSData *data, NSError *error) {
+//      if (error == nil) {
+//        fetcher.logResponseBody = [[[MyThing alloc] initWithData:data] stringDescription];
+//      }
+//      fetcher.deferResponseBodyLogging = NO;
+//   }];
+
+@property(atomic, copy, GTM_NULLABLE) NSString *logRequestBody;
+@property(atomic, assign) BOOL deferResponseBodyLogging;
+@property(atomic, copy, GTM_NULLABLE) NSString *logResponseBody;
+
+// Internal logging support.
+@property(atomic, readonly) NSData *loggedStreamData;
+@property(atomic, assign) BOOL hasLoggedError;
+@property(atomic, strong, GTM_NULLABLE) NSURL *redirectedFromURL;
+- (void)appendLoggedStreamData:(NSData *)dataToAdd;
+- (void)clearLoggedStreamData;
+
+#endif // STRIP_GTM_FETCH_LOGGING
+
+@end
+
+@interface GTMSessionFetcher (BackwardsCompatibilityOnly)
+// Clients using GTMSessionFetcher should set the cookie storage explicitly themselves.
+// This method is just for compatibility with the old GTMHTTPFetcher class.
+- (void)setCookieStorageMethod:(NSInteger)method;
+@end
+
+// Until we can just instantiate NSHTTPCookieStorage for local use, we'll
+// implement all the public methods ourselves.  This stores cookies only in
+// memory.  Additional methods are provided for testing.
+//
+// iOS 9/OS X 10.11 added +[NSHTTPCookieStorage sharedCookieStorageForGroupContainerIdentifier:]
+// which may also be used to create cookie storage.
+@interface GTMSessionCookieStorage : NSHTTPCookieStorage
+
+// Add the array off cookies to the storage, replacing duplicates.
+// Also removes expired cookies from the storage.
+- (void)setCookies:(GTM_NULLABLE GTM_NSArrayOf(NSHTTPCookie *) *)cookies;
+
+- (void)removeAllCookies;
+
+@end
+
+// Macros to monitor synchronization blocks in debug builds.
+// These report problems using GTMSessionCheckDebug.
+//
+// GTMSessionMonitorSynchronized           Start monitoring a top-level-only
+//                                         @sync scope.
+// GTMSessionMonitorRecursiveSynchronized  Start monitoring a top-level or
+//                                         recursive @sync scope.
+// GTMSessionCheckSynchronized             Verify that the current execution
+//                                         is inside a @sync scope.
+// GTMSessionCheckNotSynchronized          Verify that the current execution
+//                                         is not inside a @sync scope.
+//
+// Example usage:
+//
+// - (void)myExternalMethod {
+//   @synchronized(self) {
+//     GTMSessionMonitorSynchronized(self)
+//
+// - (void)myInternalMethod {
+//   GTMSessionCheckSynchronized(self);
+//
+// - (void)callMyCallbacks {
+//   GTMSessionCheckNotSynchronized(self);
+//
+// GTMSessionCheckNotSynchronized is available for verifying the code isn't
+// in a deadlockable @sync state when posting notifications and invoking
+// callbacks. Don't use GTMSessionCheckNotSynchronized immediately before a
+// @sync scope; the normal recursiveness check of GTMSessionMonitorSynchronized
+// can catch those.
+
+#ifdef __OBJC__
+#if DEBUG
+  #define __GTMSessionMonitorSynchronizedVariableInner(varname, counter) \
+      varname ## counter
+  #define __GTMSessionMonitorSynchronizedVariable(varname, counter)  \
+      __GTMSessionMonitorSynchronizedVariableInner(varname, counter)
+
+  #define GTMSessionMonitorSynchronized(obj)                                     \
+      NS_VALID_UNTIL_END_OF_SCOPE id                                             \
+        __GTMSessionMonitorSynchronizedVariable(__monitor, __COUNTER__) =        \
+        [[GTMSessionSyncMonitorInternal alloc] initWithSynchronizationObject:obj \
+                                                    allowRecursive:NO            \
+                                                     functionName:__func__]
+
+  #define GTMSessionMonitorRecursiveSynchronized(obj)                            \
+      NS_VALID_UNTIL_END_OF_SCOPE id                                             \
+        __GTMSessionMonitorSynchronizedVariable(__monitor, __COUNTER__) =        \
+        [[GTMSessionSyncMonitorInternal alloc] initWithSynchronizationObject:obj \
+                                                    allowRecursive:YES           \
+                                                     functionName:__func__]
+
+  #define GTMSessionCheckSynchronized(obj) {                                           \
+      GTMSESSION_ASSERT_DEBUG(                                                         \
+          [GTMSessionSyncMonitorInternal functionsHoldingSynchronizationOnObject:obj], \
+          @"GTMSessionCheckSynchronized(" #obj ") failed: not sync'd"                  \
+          @" on " #obj " in %s. Call stack:\n%@",                                      \
+          __func__, [NSThread callStackSymbols]);                                      \
+      }
+
+  #define GTMSessionCheckNotSynchronized(obj) {                                       \
+      GTMSESSION_ASSERT_DEBUG(                                                        \
+        ![GTMSessionSyncMonitorInternal functionsHoldingSynchronizationOnObject:obj], \
+        @"GTMSessionCheckNotSynchronized(" #obj ") failed: was sync'd"                \
+        @" on " #obj " in %s by %@. Call stack:\n%@", __func__,                       \
+        [GTMSessionSyncMonitorInternal functionsHoldingSynchronizationOnObject:obj],  \
+        [NSThread callStackSymbols]);                                                 \
+      }
+
+// GTMSessionSyncMonitorInternal is a private class that keeps track of the
+// beginning and end of synchronized scopes.
+//
+// This class should not be used directly, but only via the
+// GTMSessionMonitorSynchronized macro.
+@interface GTMSessionSyncMonitorInternal : NSObject
+- (instancetype)initWithSynchronizationObject:(id)object
+                               allowRecursive:(BOOL)allowRecursive
+                                 functionName:(const char *)functionName;
+// Return the names of the functions that hold sync on the object, or nil if none.
++ (NSArray *)functionsHoldingSynchronizationOnObject:(id)object;
+@end
+
+#else
+  #define GTMSessionMonitorSynchronized(obj) do { } while (0)
+  #define GTMSessionMonitorRecursiveSynchronized(obj) do { } while (0)
+  #define GTMSessionCheckSynchronized(obj) do { } while (0)
+  #define GTMSessionCheckNotSynchronized(obj) do { } while (0)
+#endif  // !DEBUG
+#endif  // __OBJC__
+
+
+GTM_ASSUME_NONNULL_END
diff --git a/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcher.m b/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcher.m
new file mode 100644
index 0000000..54b217a
--- /dev/null
+++ b/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcher.m
@@ -0,0 +1,4457 @@
+/* Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+#import "GTMSessionFetcher.h"
+
+#import <sys/utsname.h>
+
+#ifndef STRIP_GTM_FETCH_LOGGING
+  #error GTMSessionFetcher headers should have defaulted this if it wasn't already defined.
+#endif
+
+GTM_ASSUME_NONNULL_BEGIN
+
+NSString *const kGTMSessionFetcherStartedNotification           = @"kGTMSessionFetcherStartedNotification";
+NSString *const kGTMSessionFetcherStoppedNotification           = @"kGTMSessionFetcherStoppedNotification";
+NSString *const kGTMSessionFetcherRetryDelayStartedNotification = @"kGTMSessionFetcherRetryDelayStartedNotification";
+NSString *const kGTMSessionFetcherRetryDelayStoppedNotification = @"kGTMSessionFetcherRetryDelayStoppedNotification";
+
+NSString *const kGTMSessionFetcherCompletionInvokedNotification = @"kGTMSessionFetcherCompletionInvokedNotification";
+NSString *const kGTMSessionFetcherCompletionDataKey = @"data";
+NSString *const kGTMSessionFetcherCompletionErrorKey = @"error";
+
+NSString *const kGTMSessionFetcherErrorDomain       = @"com.google.GTMSessionFetcher";
+NSString *const kGTMSessionFetcherStatusDomain      = @"com.google.HTTPStatus";
+NSString *const kGTMSessionFetcherStatusDataKey     = @"data";  // data returned with a kGTMSessionFetcherStatusDomain error
+
+NSString *const kGTMSessionFetcherNumberOfRetriesDoneKey        = @"kGTMSessionFetcherNumberOfRetriesDoneKey";
+NSString *const kGTMSessionFetcherElapsedIntervalWithRetriesKey = @"kGTMSessionFetcherElapsedIntervalWithRetriesKey";
+
+static NSString *const kGTMSessionIdentifierPrefix = @"com.google.GTMSessionFetcher";
+static NSString *const kGTMSessionIdentifierDestinationFileURLMetadataKey = @"_destURL";
+static NSString *const kGTMSessionIdentifierBodyFileURLMetadataKey        = @"_bodyURL";
+
+// The default max retry interview is 10 minutes for uploads (POST/PUT/PATCH),
+// 1 minute for downloads.
+static const NSTimeInterval kUnsetMaxRetryInterval = -1.0;
+static const NSTimeInterval kDefaultMaxDownloadRetryInterval = 60.0;
+static const NSTimeInterval kDefaultMaxUploadRetryInterval = 60.0 * 10.;
+
+#ifdef GTMSESSION_PERSISTED_DESTINATION_KEY
+// Projects using unique class names should also define a unique persisted destination key.
+static NSString * const kGTMSessionFetcherPersistedDestinationKey =
+    GTMSESSION_PERSISTED_DESTINATION_KEY;
+#else
+static NSString * const kGTMSessionFetcherPersistedDestinationKey =
+    @"com.google.GTMSessionFetcher.downloads";
+#endif
+
+GTM_ASSUME_NONNULL_END
+
+//
+// GTMSessionFetcher
+//
+
+#if 0
+#define GTM_LOG_BACKGROUND_SESSION(...) GTMSESSION_LOG_DEBUG(__VA_ARGS__)
+#else
+#define GTM_LOG_BACKGROUND_SESSION(...)
+#endif
+
+#ifndef GTM_TARGET_SUPPORTS_APP_TRANSPORT_SECURITY
+  #if (!TARGET_OS_IPHONE && defined(MAC_OS_X_VERSION_10_11) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_11) \
+      || (TARGET_OS_IPHONE && defined(__IPHONE_9_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_9_0)
+    #define GTM_TARGET_SUPPORTS_APP_TRANSPORT_SECURITY 1
+  #endif
+#endif
+
+@interface GTMSessionFetcher ()
+
+@property(atomic, strong, readwrite, GTM_NULLABLE) NSData *downloadedData;
+@property(atomic, strong, readwrite, GTM_NULLABLE) NSData *downloadResumeData;
+
+#if GTM_BACKGROUND_TASK_FETCHING
+@property(assign, atomic) UIBackgroundTaskIdentifier backgroundTaskIdentifier;
+#endif
+
+@property(atomic, readwrite, getter=isUsingBackgroundSession) BOOL usingBackgroundSession;
+
+@end
+
+#if !GTMSESSION_BUILD_COMBINED_SOURCES
+@interface GTMSessionFetcher (GTMSessionFetcherLoggingInternal)
+- (void)logFetchWithError:(NSError *)error;
+- (void)logNowWithError:(GTM_NULLABLE NSError *)error;
+- (NSInputStream *)loggedInputStreamForInputStream:(NSInputStream *)inputStream;
+- (GTMSessionFetcherBodyStreamProvider)loggedStreamProviderForStreamProvider:
+    (GTMSessionFetcherBodyStreamProvider)streamProvider;
+@end
+#endif  // !GTMSESSION_BUILD_COMBINED_SOURCES
+
+GTM_ASSUME_NONNULL_BEGIN
+
+static NSTimeInterval InitialMinRetryInterval(void) {
+  return 1.0 + ((double)(arc4random_uniform(0x0FFFF)) / (double) 0x0FFFF);
+}
+
+static BOOL IsLocalhost(NSString * GTM_NULLABLE_TYPE host) {
+  // We check if there's host, and then make the comparisons.
+  if (host == nil) return NO;
+  return ([host caseInsensitiveCompare:@"localhost"] == NSOrderedSame
+          || [host isEqual:@"::1"]
+          || [host isEqual:@"127.0.0.1"]);
+}
+
+static GTMSessionFetcherTestBlock GTM_NULLABLE_TYPE gGlobalTestBlock;
+
+@implementation GTMSessionFetcher {
+  NSMutableURLRequest *_request; // after beginFetch, changed only in delegate callbacks
+  BOOL _useUploadTask;           // immutable after beginFetch
+  NSURL *_bodyFileURL;           // immutable after beginFetch
+  GTMSessionFetcherBodyStreamProvider _bodyStreamProvider;  // immutable after beginFetch
+  NSURLSession *_session;
+  BOOL _shouldInvalidateSession;  // immutable after beginFetch
+  NSURLSession *_sessionNeedingInvalidation;
+  NSURLSessionConfiguration *_configuration;
+  NSURLSessionTask *_sessionTask;
+  NSString *_taskDescription;
+  float _taskPriority;
+  NSURLResponse *_response;
+  NSString *_sessionIdentifier;
+  BOOL _wasCreatedFromBackgroundSession;
+  BOOL _didCreateSessionIdentifier;
+  NSString *_sessionIdentifierUUID;
+  BOOL _userRequestedBackgroundSession;
+  BOOL _usingBackgroundSession;
+  NSMutableData * GTM_NULLABLE_TYPE _downloadedData;
+  NSError *_downloadFinishedError;
+  NSData *_downloadResumeData;  // immutable after construction
+  NSURL *_destinationFileURL;
+  int64_t _downloadedLength;
+  NSURLCredential *_credential;     // username & password
+  NSURLCredential *_proxyCredential; // credential supplied to proxy servers
+  BOOL _isStopNotificationNeeded;   // set when start notification has been sent
+  BOOL _isUsingTestBlock;  // set when a test block was provided (remains set when the block is released)
+  id _userData;                      // retained, if set by caller
+  NSMutableDictionary *_properties;  // more data retained for caller
+  dispatch_queue_t _callbackQueue;
+  dispatch_group_t _callbackGroup;   // read-only after creation
+  NSOperationQueue *_delegateQueue;  // immutable after beginFetch
+
+  id<GTMFetcherAuthorizationProtocol> _authorizer;  // immutable after beginFetch
+
+  // The service object that created and monitors this fetcher, if any.
+  id<GTMSessionFetcherServiceProtocol> _service;  // immutable; set by the fetcher service upon creation
+  NSString *_serviceHost;
+  NSInteger _servicePriority;       // immutable after beginFetch
+  BOOL _hasStoppedFetching;         // counterpart to _initialBeginFetchDate
+  BOOL _userStoppedFetching;
+
+  BOOL _isRetryEnabled;             // user wants auto-retry
+  NSTimer *_retryTimer;
+  NSUInteger _retryCount;
+  NSTimeInterval _maxRetryInterval; // default 60 (download) or 600 (upload) seconds
+  NSTimeInterval _minRetryInterval; // random between 1 and 2 seconds
+  NSTimeInterval _retryFactor;      // default interval multiplier is 2
+  NSTimeInterval _lastRetryInterval;
+  NSDate *_initialBeginFetchDate;   // date that beginFetch was first invoked; immutable after initial beginFetch
+  NSDate *_initialRequestDate;      // date of first request to the target server (ignoring auth)
+  BOOL _hasAttemptedAuthRefresh;    // accessed only in shouldRetryNowForStatus:
+
+  NSString *_comment;               // comment for log
+  NSString *_log;
+#if !STRIP_GTM_FETCH_LOGGING
+  NSMutableData *_loggedStreamData;
+  NSURL *_redirectedFromURL;
+  NSString *_logRequestBody;
+  NSString *_logResponseBody;
+  BOOL _hasLoggedError;
+  BOOL _deferResponseBodyLogging;
+#endif
+}
+
+#if !GTMSESSION_UNIT_TESTING
++ (void)load {
+  [self fetchersForBackgroundSessions];
+}
+#endif
+
++ (instancetype)fetcherWithRequest:(GTM_NULLABLE NSURLRequest *)request {
+  return [[self alloc] initWithRequest:request configuration:nil];
+}
+
++ (instancetype)fetcherWithURL:(NSURL *)requestURL {
+  return [self fetcherWithRequest:[NSURLRequest requestWithURL:requestURL]];
+}
+
++ (instancetype)fetcherWithURLString:(NSString *)requestURLString {
+  return [self fetcherWithURL:(NSURL *)[NSURL URLWithString:requestURLString]];
+}
+
++ (instancetype)fetcherWithDownloadResumeData:(NSData *)resumeData {
+  GTMSessionFetcher *fetcher = [self fetcherWithRequest:nil];
+  fetcher.comment = @"Resuming download";
+  fetcher.downloadResumeData = resumeData;
+  return fetcher;
+}
+
++ (GTM_NULLABLE instancetype)fetcherWithSessionIdentifier:(NSString *)sessionIdentifier {
+  GTMSESSION_ASSERT_DEBUG(sessionIdentifier != nil, @"Invalid session identifier");
+  NSMapTable *sessionIdentifierToFetcherMap = [self sessionIdentifierToFetcherMap];
+  GTMSessionFetcher *fetcher = [sessionIdentifierToFetcherMap objectForKey:sessionIdentifier];
+  if (!fetcher && [sessionIdentifier hasPrefix:kGTMSessionIdentifierPrefix]) {
+    fetcher = [self fetcherWithRequest:nil];
+    [fetcher setSessionIdentifier:sessionIdentifier];
+    [sessionIdentifierToFetcherMap setObject:fetcher forKey:sessionIdentifier];
+    fetcher->_wasCreatedFromBackgroundSession = YES;
+    [fetcher setCommentWithFormat:@"Resuming %@",
+     fetcher && fetcher->_sessionIdentifierUUID ? fetcher->_sessionIdentifierUUID : @"?"];
+  }
+  return fetcher;
+}
+
++ (NSMapTable *)sessionIdentifierToFetcherMap {
+  // TODO: What if a service is involved in creating the fetcher? Currently, when re-creating
+  // fetchers, if a service was involved, it is not re-created. Should the service maintain a map?
+  static NSMapTable *gSessionIdentifierToFetcherMap = nil;
+
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    gSessionIdentifierToFetcherMap = [NSMapTable strongToWeakObjectsMapTable];
+  });
+  return gSessionIdentifierToFetcherMap;
+}
+
+#if !GTM_ALLOW_INSECURE_REQUESTS
++ (BOOL)appAllowsInsecureRequests {
+  // If the main bundle Info.plist key NSAppTransportSecurity is present, and it specifies
+  // NSAllowsArbitraryLoads, then we need to explicitly enforce secure schemes.
+#if GTM_TARGET_SUPPORTS_APP_TRANSPORT_SECURITY
+  static BOOL allowsInsecureRequests;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    NSBundle *mainBundle = [NSBundle mainBundle];
+    NSDictionary *appTransportSecurity =
+        [mainBundle objectForInfoDictionaryKey:@"NSAppTransportSecurity"];
+    allowsInsecureRequests =
+        [[appTransportSecurity objectForKey:@"NSAllowsArbitraryLoads"] boolValue];
+  });
+  return allowsInsecureRequests;
+#else
+  // For builds targeting iOS 8 or 10.10 and earlier, we want to require fetcher
+  // security checks.
+  return YES;
+#endif  // GTM_TARGET_SUPPORTS_APP_TRANSPORT_SECURITY
+}
+#else  // GTM_ALLOW_INSECURE_REQUESTS
++ (BOOL)appAllowsInsecureRequests {
+  return YES;
+}
+#endif  // !GTM_ALLOW_INSECURE_REQUESTS
+
+
+- (instancetype)init {
+  return [self initWithRequest:nil configuration:nil];
+}
+
+- (instancetype)initWithRequest:(NSURLRequest *)request  {
+  return [self initWithRequest:request configuration:nil];
+}
+
+- (instancetype)initWithRequest:(GTM_NULLABLE NSURLRequest *)request
+                  configuration:(GTM_NULLABLE NSURLSessionConfiguration *)configuration {
+  self = [super init];
+  if (self) {
+    if (![NSURLSession class]) {
+      Class oldFetcherClass = NSClassFromString(@"GTMHTTPFetcher");
+      if (oldFetcherClass && request) {
+        self = [[oldFetcherClass alloc] initWithRequest:(NSURLRequest *)request];
+      } else {
+        self = nil;
+      }
+      return self;
+    }
+#if GTM_BACKGROUND_TASK_FETCHING
+    _backgroundTaskIdentifier = UIBackgroundTaskInvalid;
+#endif
+    _request = [request mutableCopy];
+    _configuration = configuration;
+
+    NSData *bodyData = request.HTTPBody;
+    if (bodyData) {
+      _bodyLength = (int64_t)bodyData.length;
+    } else {
+      _bodyLength = NSURLSessionTransferSizeUnknown;
+    }
+
+    _callbackQueue = dispatch_get_main_queue();
+    _callbackGroup = dispatch_group_create();
+    _delegateQueue = [NSOperationQueue mainQueue];
+
+    _minRetryInterval = InitialMinRetryInterval();
+    _maxRetryInterval = kUnsetMaxRetryInterval;
+
+    _taskPriority = -1.0f;  // Valid values if set are 0.0...1.0.
+
+#if !STRIP_GTM_FETCH_LOGGING
+    // Encourage developers to set the comment property or use
+    // setCommentWithFormat: by providing a default string.
+    _comment = @"(No fetcher comment set)";
+#endif
+  }
+  return self;
+}
+
+- (id)copyWithZone:(NSZone *)zone {
+  // disallow use of fetchers in a copy property
+  [self doesNotRecognizeSelector:_cmd];
+  return nil;
+}
+
+- (NSString *)description {
+  NSString *requestStr = self.request.URL.description;
+  if (requestStr.length == 0) {
+    if (self.downloadResumeData.length > 0) {
+      requestStr = @"<download resume data>";
+    } else if (_wasCreatedFromBackgroundSession) {
+      requestStr = @"<from bg session>";
+    } else {
+      requestStr = @"<no request>";
+    }
+  }
+  return [NSString stringWithFormat:@"%@ %p (%@)", [self class], self, requestStr];
+}
+
+- (void)dealloc {
+  GTMSESSION_ASSERT_DEBUG(!_isStopNotificationNeeded,
+                          @"unbalanced fetcher notification for %@", _request.URL);
+  [self forgetSessionIdentifierForFetcherWithoutSyncCheck];
+
+  // Note: if a session task or a retry timer was pending, then this instance
+  // would be retained by those so it wouldn't be getting dealloc'd,
+  // hence we don't need to stopFetch here
+}
+
+#pragma mark -
+
+// Begin fetching the URL (or begin a retry fetch).  The delegate is retained
+// for the duration of the fetch connection.
+
+- (void)beginFetchWithCompletionHandler:(GTM_NULLABLE GTMSessionFetcherCompletionHandler)handler {
+  GTMSessionCheckNotSynchronized(self);
+
+  _completionHandler = [handler copy];
+
+  // The user may have called setDelegate: earlier if they want to use other
+  // delegate-style callbacks during the fetch; otherwise, the delegate is nil,
+  // which is fine.
+  [self beginFetchMayDelay:YES mayAuthorize:YES];
+}
+
+- (GTMSessionFetcherCompletionHandler)completionHandlerWithTarget:(GTM_NULLABLE_TYPE id)target
+                                                didFinishSelector:(GTM_NULLABLE_TYPE SEL)finishedSelector {
+  GTMSessionFetcherAssertValidSelector(target, finishedSelector, @encode(GTMSessionFetcher *),
+                                       @encode(NSData *), @encode(NSError *), 0);
+  GTMSessionFetcherCompletionHandler completionHandler = ^(NSData *data, NSError *error) {
+      if (target && finishedSelector) {
+        id selfArg = self;  // Placate ARC.
+        NSMethodSignature *sig = [target methodSignatureForSelector:finishedSelector];
+        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:sig];
+        [invocation setSelector:(SEL)finishedSelector];
+        [invocation setTarget:target];
+        [invocation setArgument:&selfArg atIndex:2];
+        [invocation setArgument:&data atIndex:3];
+        [invocation setArgument:&error atIndex:4];
+        [invocation invoke];
+      }
+  };
+  return completionHandler;
+}
+
+- (void)beginFetchWithDelegate:(GTM_NULLABLE_TYPE id)target
+             didFinishSelector:(GTM_NULLABLE_TYPE SEL)finishedSelector {
+  GTMSessionCheckNotSynchronized(self);
+
+  GTMSessionFetcherCompletionHandler handler =  [self completionHandlerWithTarget:target
+                                                                didFinishSelector:finishedSelector];
+  [self beginFetchWithCompletionHandler:handler];
+}
+
+- (void)beginFetchMayDelay:(BOOL)mayDelay
+              mayAuthorize:(BOOL)mayAuthorize {
+  // This is the internal entry point for re-starting fetches.
+  GTMSessionCheckNotSynchronized(self);
+
+  NSMutableURLRequest *fetchRequest = _request;  // The request property is now externally immutable.
+  NSURL *fetchRequestURL = fetchRequest.URL;
+  NSString *priorSessionIdentifier = self.sessionIdentifier;
+
+  // A utility block for creating error objects when we fail to start the fetch.
+  NSError *(^beginFailureError)(NSInteger) = ^(NSInteger code){
+    NSString *urlString = fetchRequestURL.absoluteString;
+    NSDictionary *userInfo = @{
+      NSURLErrorFailingURLStringErrorKey : (urlString ? urlString : @"(missing URL)")
+    };
+    return [NSError errorWithDomain:kGTMSessionFetcherErrorDomain
+                               code:code
+                           userInfo:userInfo];
+  };
+
+  // Catch delegate queue maxConcurrentOperationCount values other than 1, particularly
+  // NSOperationQueueDefaultMaxConcurrentOperationCount (-1), to avoid the additional complexity
+  // of simultaneous or out-of-order delegate callbacks.
+  GTMSESSION_ASSERT_DEBUG(_delegateQueue.maxConcurrentOperationCount == 1,
+                          @"delegate queue %@ should support one concurrent operation, not %zd",
+                          _delegateQueue.name, _delegateQueue.maxConcurrentOperationCount);
+
+  if (!_initialBeginFetchDate) {
+    // This ivar is set only here on the initial beginFetch so need not be synchronized.
+    _initialBeginFetchDate = [[NSDate alloc] init];
+  }
+
+  if (self.sessionTask != nil) {
+    // If cached fetcher returned through fetcherWithSessionIdentifier:, then it's
+    // already begun, but don't consider this a failure, since the user need not know this.
+    if (self.sessionIdentifier != nil) {
+      return;
+    }
+    GTMSESSION_ASSERT_DEBUG(NO, @"Fetch object %@ being reused; this should never happen", self);
+    [self failToBeginFetchWithError:beginFailureError(GTMSessionFetcherErrorDownloadFailed)];
+    return;
+  }
+
+  if (fetchRequestURL == nil && !_downloadResumeData && !priorSessionIdentifier) {
+    GTMSESSION_ASSERT_DEBUG(NO, @"Beginning a fetch requires a request with a URL");
+    [self failToBeginFetchWithError:beginFailureError(GTMSessionFetcherErrorDownloadFailed)];
+    return;
+  }
+
+  // We'll respect the user's request for a background session (unless this is
+  // an upload fetcher, which does its initial request foreground.)
+  self.usingBackgroundSession = self.useBackgroundSession && [self canFetchWithBackgroundSession];
+
+  NSURL *bodyFileURL = self.bodyFileURL;
+  if (bodyFileURL) {
+    NSError *fileCheckError;
+    if (![bodyFileURL checkResourceIsReachableAndReturnError:&fileCheckError]) {
+      // This assert fires when the file being uploaded no longer exists once
+      // the fetcher is ready to start the upload.
+      GTMSESSION_ASSERT_DEBUG_OR_LOG(0, @"Body file is unreachable: %@\n  %@",
+                                     bodyFileURL.path, fileCheckError);
+      [self failToBeginFetchWithError:fileCheckError];
+      return;
+    }
+  }
+
+  NSString *requestScheme = fetchRequestURL.scheme;
+  BOOL isDataRequest = [requestScheme isEqual:@"data"];
+  if (isDataRequest) {
+    // NSURLSession does not support data URLs in background sessions.
+#if DEBUG
+    if (priorSessionIdentifier || self.sessionIdentifier) {
+      GTMSESSION_LOG_DEBUG(@"Converting background to foreground session for %@",
+                           fetchRequest);
+    }
+#endif
+    [self setSessionIdentifierInternal:nil];
+    self.useBackgroundSession = NO;
+  }
+
+#if GTM_ALLOW_INSECURE_REQUESTS
+  BOOL shouldCheckSecurity = NO;
+#else
+  BOOL shouldCheckSecurity = (fetchRequestURL != nil
+                              && !isDataRequest
+                              && [[self class] appAllowsInsecureRequests]);
+#endif
+
+  if (shouldCheckSecurity) {
+    // Allow https only for requests, unless overridden by the client.
+    //
+    // Non-https requests may too easily be snooped, so we disallow them by default.
+    //
+    // file: and data: schemes are usually safe if they are hardcoded in the client or provided
+    // by a trusted source, but since it's fairly rare to need them, it's safest to make clients
+    // explicitly whitelist them.
+    BOOL isSecure =
+        requestScheme != nil && [requestScheme caseInsensitiveCompare:@"https"] == NSOrderedSame;
+    if (!isSecure) {
+      BOOL allowRequest = NO;
+      NSString *host = fetchRequestURL.host;
+
+      // Check schemes first.  A file scheme request may be allowed here, or as a localhost request.
+      for (NSString *allowedScheme in _allowedInsecureSchemes) {
+        if (requestScheme != nil &&
+            [requestScheme caseInsensitiveCompare:allowedScheme] == NSOrderedSame) {
+          allowRequest = YES;
+          break;
+        }
+      }
+      if (!allowRequest) {
+        // Check for localhost requests.  Security checks only occur for non-https requests, so
+        // this check won't happen for an https request to localhost.
+        BOOL isLocalhostRequest = (host.length == 0 && [fetchRequestURL isFileURL]) || IsLocalhost(host);
+        if (isLocalhostRequest) {
+          if (self.allowLocalhostRequest) {
+            allowRequest = YES;
+          } else {
+            GTMSESSION_ASSERT_DEBUG(NO, @"Fetch request for localhost but fetcher"
+                                        @" allowLocalhostRequest is not set: %@", fetchRequestURL);
+          }
+        } else {
+          GTMSESSION_ASSERT_DEBUG(NO, @"Insecure fetch request has a scheme (%@)"
+                                      @" not found in fetcher allowedInsecureSchemes (%@): %@",
+                                  requestScheme, _allowedInsecureSchemes ?: @" @[] ", fetchRequestURL);
+        }
+      }
+
+      if (!allowRequest) {
+#if !DEBUG
+        NSLog(@"Insecure fetch disallowed for %@", fetchRequestURL.description ?: @"nil request URL");
+#endif
+        [self failToBeginFetchWithError:beginFailureError(GTMSessionFetcherErrorInsecureRequest)];
+        return;
+      }
+    }  // !isSecure
+  }  // (requestURL != nil) && !isDataRequest
+
+  if (self.cookieStorage == nil) {
+    self.cookieStorage = [[self class] staticCookieStorage];
+  }
+
+  BOOL isRecreatingSession = (self.sessionIdentifier != nil) && (fetchRequest == nil);
+
+  self.canShareSession = !isRecreatingSession && !self.usingBackgroundSession;
+
+  if (!self.session && self.canShareSession) {
+    self.session = [_service sessionForFetcherCreation];
+    // If _session is nil, then the service's session creation semaphore will block
+    // until this fetcher invokes fetcherDidCreateSession: below, so this *must* invoke
+    // that method, even if the session fails to be created.
+  }
+
+  if (!self.session) {
+    // Create a session.
+    if (!_configuration) {
+      if (priorSessionIdentifier || self.usingBackgroundSession) {
+        NSString *sessionIdentifier = priorSessionIdentifier;
+        if (!sessionIdentifier) {
+          sessionIdentifier = [self createSessionIdentifierWithMetadata:nil];
+        }
+        NSMapTable *sessionIdentifierToFetcherMap = [[self class] sessionIdentifierToFetcherMap];
+        [sessionIdentifierToFetcherMap setObject:self forKey:self.sessionIdentifier];
+
+#if (!TARGET_OS_IPHONE && defined(MAC_OS_X_VERSION_10_10) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_10) \
+    || (TARGET_OS_IPHONE && defined(__IPHONE_8_0) && __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_8_0)
+        // iOS 8/10.10 builds require the new backgroundSessionConfiguration method name.
+        _configuration =
+            [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:sessionIdentifier];
+#elif (!TARGET_OS_IPHONE && defined(MAC_OS_X_VERSION_10_10) && MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10) \
+    || (TARGET_OS_IPHONE && defined(__IPHONE_8_0) && __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_8_0)
+        // Do a runtime check to avoid a deprecation warning about using
+        // +backgroundSessionConfiguration: on iOS 8.
+        if ([NSURLSessionConfiguration respondsToSelector:@selector(backgroundSessionConfigurationWithIdentifier:)]) {
+          // Running on iOS 8+/OS X 10.10+.
+          _configuration =
+              [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:sessionIdentifier];
+        } else {
+          // Running on iOS 7/OS X 10.9.
+          _configuration =
+              [NSURLSessionConfiguration backgroundSessionConfiguration:sessionIdentifier];
+        }
+#else
+        // Building with an SDK earlier than iOS 8/OS X 10.10.
+        _configuration =
+            [NSURLSessionConfiguration backgroundSessionConfiguration:sessionIdentifier];
+#endif
+        self.usingBackgroundSession = YES;
+        self.canShareSession = NO;
+      } else {
+        _configuration = [NSURLSessionConfiguration ephemeralSessionConfiguration];
+      }
+#if !GTM_ALLOW_INSECURE_REQUESTS
+      _configuration.TLSMinimumSupportedProtocol = kTLSProtocol12;
+#endif
+    }  // !_configuration
+    _configuration.HTTPCookieStorage = self.cookieStorage;
+
+    if (_configurationBlock) {
+      _configurationBlock(self, _configuration);
+    }
+
+    id<NSURLSessionDelegate> delegate = [_service sessionDelegate];
+    if (!delegate || !self.canShareSession) {
+      delegate = self;
+    }
+    self.session = [NSURLSession sessionWithConfiguration:_configuration
+                                                 delegate:delegate
+                                            delegateQueue:self.sessionDelegateQueue];
+    GTMSESSION_ASSERT_DEBUG(self.session, @"Couldn't create session");
+
+    // Tell the service about the session created by this fetcher.  This also signals the
+    // service's semaphore to allow other fetchers to request this session.
+    [_service fetcherDidCreateSession:self];
+
+    // If this assertion fires, the client probably tried to use a session identifier that was
+    // already used. The solution is to make the client use a unique identifier (or better yet let
+    // the session fetcher assign the identifier).
+    GTMSESSION_ASSERT_DEBUG(self.session.delegate == delegate, @"Couldn't assign delegate.");
+
+    if (self.session) {
+      BOOL isUsingSharedDelegate = (delegate != self);
+      if (!isUsingSharedDelegate) {
+        _shouldInvalidateSession = YES;
+      }
+    }
+  }
+
+  if (isRecreatingSession) {
+    _shouldInvalidateSession = YES;
+
+    // Let's make sure there are tasks still running or if not that we get a callback from a
+    // completed one; otherwise, we assume the tasks failed.
+    // This is the observed behavior perhaps 25% of the time within the Simulator running 7.0.3 on
+    // exiting the app after starting an upload and relaunching the app if we manage to relaunch
+    // after the task has completed, but before the system relaunches us in the background.
+    [self.session getTasksWithCompletionHandler:^(NSArray *dataTasks, NSArray *uploadTasks,
+                                                  NSArray *downloadTasks) {
+      if (dataTasks.count == 0 && uploadTasks.count == 0 && downloadTasks.count == 0) {
+        double const kDelayInSeconds = 1.0;  // We should get progress indication or completion soon
+        dispatch_time_t checkForFeedbackDelay =
+            dispatch_time(DISPATCH_TIME_NOW, (int64_t)(kDelayInSeconds * NSEC_PER_SEC));
+        dispatch_after(checkForFeedbackDelay, dispatch_get_main_queue(), ^{
+          if (!self.sessionTask && !fetchRequest) {
+            // If our task and/or request haven't been restored, then we assume task feedback lost.
+            [self removePersistedBackgroundSessionFromDefaults];
+            NSError *sessionError =
+                [NSError errorWithDomain:kGTMSessionFetcherErrorDomain
+                                    code:GTMSessionFetcherErrorBackgroundFetchFailed
+                                userInfo:nil];
+            [self failToBeginFetchWithError:sessionError];
+          }
+        });
+      }
+    }];
+    return;
+  }
+
+  self.downloadedData = nil;
+  self.downloadedLength = 0;
+
+  if (_servicePriority == NSIntegerMin) {
+    mayDelay = NO;
+  }
+  if (mayDelay && _service) {
+    BOOL shouldFetchNow = [_service fetcherShouldBeginFetching:self];
+    if (!shouldFetchNow) {
+      // The fetch is deferred, but will happen later.
+      //
+      // If this session is held by the fetcher service, clear the session now so that we don't
+      // assume it's still valid after the fetcher is restarted.
+      if (self.canShareSession) {
+        self.session = nil;
+      }
+      return;
+    }
+  }
+
+  NSString *effectiveHTTPMethod = [fetchRequest valueForHTTPHeaderField:@"X-HTTP-Method-Override"];
+  if (effectiveHTTPMethod == nil) {
+    effectiveHTTPMethod = fetchRequest.HTTPMethod;
+  }
+  BOOL isEffectiveHTTPGet = (effectiveHTTPMethod == nil
+                             || [effectiveHTTPMethod isEqual:@"GET"]);
+
+  BOOL needsUploadTask = (self.useUploadTask || self.bodyFileURL || self.bodyStreamProvider);
+  if (_bodyData || self.bodyStreamProvider || fetchRequest.HTTPBodyStream) {
+    if (isEffectiveHTTPGet) {
+      fetchRequest.HTTPMethod = @"POST";
+      isEffectiveHTTPGet = NO;
+    }
+
+    if (_bodyData) {
+      if (!needsUploadTask) {
+        fetchRequest.HTTPBody = _bodyData;
+      }
+#if !STRIP_GTM_FETCH_LOGGING
+    } else if (fetchRequest.HTTPBodyStream) {
+      if ([self respondsToSelector:@selector(loggedInputStreamForInputStream:)]) {
+        fetchRequest.HTTPBodyStream =
+            [self performSelector:@selector(loggedInputStreamForInputStream:)
+                       withObject:fetchRequest.HTTPBodyStream];
+      }
+#endif
+    }
+  }
+
+  // We authorize after setting up the http method and body in the request
+  // because OAuth 1 may need to sign the request body
+  if (mayAuthorize && _authorizer && !isDataRequest) {
+    BOOL isAuthorized = [_authorizer isAuthorizedRequest:fetchRequest];
+    if (!isAuthorized) {
+      // Authorization needed.
+      //
+      // If this session is held by the fetcher service, clear the session now so that we don't
+      // assume it's still valid after authorization completes.
+      if (self.canShareSession) {
+        self.session = nil;
+      }
+
+      // Authorizing the request will recursively call this beginFetch:mayDelay:
+      // or failToBeginFetchWithError:.
+      [self authorizeRequest];
+      return;
+    }
+  }
+
+  // set the default upload or download retry interval, if necessary
+  if ([self isRetryEnabled] && self.maxRetryInterval <= 0) {
+    if (isEffectiveHTTPGet || [effectiveHTTPMethod isEqual:@"HEAD"]) {
+      [self setMaxRetryInterval:kDefaultMaxDownloadRetryInterval];
+    } else {
+      [self setMaxRetryInterval:kDefaultMaxUploadRetryInterval];
+    }
+  }
+
+  // finally, start the connection
+  NSURLSessionTask *newSessionTask;
+  BOOL needsDataAccumulator = NO;
+  if (_downloadResumeData) {
+    newSessionTask = [_session downloadTaskWithResumeData:_downloadResumeData];
+    GTMSESSION_ASSERT_DEBUG_OR_LOG(newSessionTask,
+        @"Failed downloadTaskWithResumeData for %@, resume data %tu bytes",
+        _session, _downloadResumeData.length);
+  } else if (_destinationFileURL && !isDataRequest) {
+    newSessionTask = [_session downloadTaskWithRequest:fetchRequest];
+    GTMSESSION_ASSERT_DEBUG_OR_LOG(newSessionTask, @"Failed downloadTaskWithRequest for %@, %@",
+                                   _session, fetchRequest);
+  } else if (needsUploadTask) {
+    if (bodyFileURL) {
+      newSessionTask = [_session uploadTaskWithRequest:fetchRequest
+                                              fromFile:bodyFileURL];
+      GTMSESSION_ASSERT_DEBUG_OR_LOG(newSessionTask,
+                                     @"Failed uploadTaskWithRequest for %@, %@, file %@",
+                                     _session, fetchRequest, bodyFileURL.path);
+    } else if (self.bodyStreamProvider) {
+      newSessionTask = [_session uploadTaskWithStreamedRequest:fetchRequest];
+      GTMSESSION_ASSERT_DEBUG_OR_LOG(newSessionTask,
+                                     @"Failed uploadTaskWithStreamedRequest for %@, %@",
+                                     _session, fetchRequest);
+    } else {
+      GTMSESSION_ASSERT_DEBUG_OR_LOG(_bodyData != nil,
+                                     @"Upload task needs body data, %@", fetchRequest);
+      newSessionTask = [_session uploadTaskWithRequest:fetchRequest
+                                            fromData:(NSData * GTM_NONNULL_TYPE)_bodyData];
+      GTMSESSION_ASSERT_DEBUG_OR_LOG(newSessionTask,
+          @"Failed uploadTaskWithRequest for %@, %@, body data %tu bytes",
+          _session, fetchRequest, _bodyData.length);
+    }
+    needsDataAccumulator = YES;
+  } else {
+    newSessionTask = [_session dataTaskWithRequest:fetchRequest];
+    needsDataAccumulator = YES;
+    GTMSESSION_ASSERT_DEBUG_OR_LOG(newSessionTask, @"Failed dataTaskWithRequest for %@, %@",
+                                   _session, fetchRequest);
+  }
+  self.sessionTask = newSessionTask;
+
+  if (!newSessionTask) {
+    // We shouldn't get here; if we're here, an earlier assertion should have fired to explain
+    // which session task creation failed.
+    [self failToBeginFetchWithError:beginFailureError(GTMSessionFetcherErrorTaskCreationFailed)];
+    return;
+  }
+
+  if (needsDataAccumulator && _accumulateDataBlock == nil) {
+    self.downloadedData = [NSMutableData data];
+  }
+  if (_taskDescription) {
+    newSessionTask.taskDescription = _taskDescription;
+  }
+  if (_taskPriority >= 0) {
+#if (!TARGET_OS_IPHONE && defined(MAC_OS_X_VERSION_10_10) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_10) \
+    || (TARGET_OS_IPHONE && defined(__IPHONE_8_0) && __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_8_0)
+    BOOL hasTaskPriority = YES;
+#else
+    BOOL hasTaskPriority = [newSessionTask respondsToSelector:@selector(setPriority:)];
+#endif
+    if (hasTaskPriority) {
+      newSessionTask.priority = _taskPriority;
+    }
+  }
+
+#if GTM_DISABLE_FETCHER_TEST_BLOCK
+  GTMSESSION_ASSERT_DEBUG(_testBlock == nil && gGlobalTestBlock == nil, @"test blocks disabled");
+  _testBlock = nil;
+#else
+  if (!_testBlock) {
+    if (gGlobalTestBlock) {
+      // Note that the test block may pass nil for all of its response parameters,
+      // indicating that the fetch should actually proceed. This is useful when the
+      // global test block has been set, and the app is only testing a specific
+      // fetcher.  The block simulation code will then resume the task.
+      _testBlock = gGlobalTestBlock;
+    }
+  }
+  _isUsingTestBlock = (_testBlock != nil);
+#endif  // GTM_DISABLE_FETCHER_TEST_BLOCK
+
+#if GTM_BACKGROUND_TASK_FETCHING
+  // Background tasks seem to interfere with out-of-process uploads and downloads.
+  if (!self.skipBackgroundTask && !self.useBackgroundSession) {
+    // Tell UIApplication that we want to continue even when the app is in the
+    // background.
+    id<GTMUIApplicationProtocol> app = [[self class] fetcherUIApplication];
+#if DEBUG
+    NSString *bgTaskName = [NSString stringWithFormat:@"%@-%@",
+                            [self class], fetchRequest.URL.host];
+#else
+    NSString *bgTaskName = @"GTMSessionFetcher";
+#endif
+    __block UIBackgroundTaskIdentifier bgTaskID = [app beginBackgroundTaskWithName:bgTaskName
+                                                                 expirationHandler:^{
+      // Background task expiration callback - this block is always invoked by
+      // UIApplication on the main thread.
+      if (bgTaskID != UIBackgroundTaskInvalid) {
+        if (bgTaskID == self.backgroundTaskIdentifier) {
+          self.backgroundTaskIdentifier = UIBackgroundTaskInvalid;
+        }
+        [app endBackgroundTask:bgTaskID];
+      }
+    }];
+    self.backgroundTaskIdentifier = bgTaskID;
+  }
+#endif
+
+  if (!_initialRequestDate) {
+    _initialRequestDate = [[NSDate alloc] init];
+  }
+
+  // We don't expect to reach here even on retry or auth until a stop notification has been sent
+  // for the previous task, but we should ensure that we don't unbalance that.
+  GTMSESSION_ASSERT_DEBUG(!_isStopNotificationNeeded, @"Start notification without a prior stop");
+  [self sendStopNotificationIfNeeded];
+
+  [self addPersistedBackgroundSessionToDefaults];
+
+  [self setStopNotificationNeeded:YES];
+
+  [self postNotificationOnMainThreadWithName:kGTMSessionFetcherStartedNotification
+                                    userInfo:nil
+                                requireAsync:NO];
+
+  // The service needs to know our task if it is serving as NSURLSession delegate.
+  [_service fetcherDidBeginFetching:self];
+
+  if (_testBlock) {
+#if !GTM_DISABLE_FETCHER_TEST_BLOCK
+    [self simulateFetchForTestBlock];
+#endif
+  } else {
+    // We resume the session task after posting the notification since the
+    // delegate callbacks may happen immediately if the fetch is started off
+    // the main thread or the session delegate queue is on a background thread,
+    // and we don't want to post a start notification after a premature finish
+    // of the session task.
+    [newSessionTask resume];
+  }
+}
+
+NSData * GTM_NULLABLE_TYPE GTMDataFromInputStream(NSInputStream *inputStream, NSError **outError) {
+  NSMutableData *data = [NSMutableData data];
+
+  [inputStream open];
+  NSInteger numberOfBytesRead = 0;
+  while ([inputStream hasBytesAvailable]) {
+    uint8_t buffer[512];
+    numberOfBytesRead = [inputStream read:buffer maxLength:sizeof(buffer)];
+    if (numberOfBytesRead > 0) {
+      [data appendBytes:buffer length:(NSUInteger)numberOfBytesRead];
+    } else {
+      break;
+    }
+  }
+  [inputStream close];
+  NSError *streamError = inputStream.streamError;
+
+  if (streamError) {
+    data = nil;
+  }
+  if (outError) {
+    *outError = streamError;
+  }
+  return data;
+}
+
+#if !GTM_DISABLE_FETCHER_TEST_BLOCK
+
+- (void)simulateFetchForTestBlock {
+  // This is invoked on the same thread as the beginFetch method was.
+  //
+  // Callbacks will all occur on the callback queue.
+  _testBlock(self, ^(NSURLResponse *response, NSData *responseData, NSError *error) {
+      // Callback from test block.
+      if (response == nil && responseData == nil && error == nil) {
+        // Assume the fetcher should execute rather than be tested.
+        _testBlock = nil;
+        _isUsingTestBlock = NO;
+        [_sessionTask resume];
+        return;
+      }
+
+      GTMSessionFetcherBodyStreamProvider bodyStreamProvider = self.bodyStreamProvider;
+      if (bodyStreamProvider) {
+        bodyStreamProvider(^(NSInputStream *bodyStream){
+          // Read from the input stream into an NSData buffer.  We'll drain the stream
+          // explicitly on a background queue.
+          [self invokeOnCallbackQueue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0)
+                     afterUserStopped:NO
+                                block:^{
+            NSError *streamError;
+            NSData *streamedData = GTMDataFromInputStream(bodyStream, &streamError);
+
+            dispatch_async(dispatch_get_main_queue(), ^{
+              // Continue callbacks on the main thread, since serial behavior
+              // is more reliable for tests.
+              [self simulateDataCallbacksForTestBlockWithBodyData:streamedData
+                                                         response:response
+                                                     responseData:responseData
+                                                            error:(error ?: streamError)];
+            });
+          }];
+        });
+      } else {
+        // No input stream; use the supplied data or file URL.
+        NSURL *bodyFileURL = self.bodyFileURL;
+        if (bodyFileURL) {
+          NSError *readError;
+          _bodyData = [NSData dataWithContentsOfURL:bodyFileURL
+                                            options:NSDataReadingMappedIfSafe
+                                              error:&readError];
+          error = readError;
+        }
+
+        // No stream provider.
+
+        // In real fetches, nothing happens until the run loop spins, so apps have leeway to
+        // set callbacks after they call beginFetch. We'll mirror that fetcher behavior by
+        // delaying callbacks here at least to the next spin of the run loop.  That keeps
+        // immediate, synchronous setting of callback blocks after beginFetch working in tests.
+        dispatch_async(dispatch_get_main_queue(), ^{
+          [self simulateDataCallbacksForTestBlockWithBodyData:_bodyData
+                                                     response:response
+                                                 responseData:responseData
+                                                        error:error];
+        });
+      }
+    });
+}
+
+- (void)simulateByteTransferReportWithDataLength:(int64_t)totalDataLength
+                                           block:(GTMSessionFetcherSendProgressBlock)block {
+  // This utility method simulates transfer progress with up to three callbacks.
+  // It is used to call back to any of the progress blocks.
+  int64_t sendReportSize = totalDataLength / 3 + 1;
+  int64_t totalSent = 0;
+  while (totalSent < totalDataLength) {
+    int64_t bytesRemaining = totalDataLength - totalSent;
+    sendReportSize = MIN(sendReportSize, bytesRemaining);
+    totalSent += sendReportSize;
+    [self invokeOnCallbackQueueUnlessStopped:^{
+        block(sendReportSize, totalSent, totalDataLength);
+    }];
+  }
+}
+
+- (void)simulateDataCallbacksForTestBlockWithBodyData:(NSData * GTM_NULLABLE_TYPE)bodyData
+                                             response:(NSURLResponse *)response
+                                         responseData:(NSData *)suppliedData
+                                                error:(NSError *)suppliedError {
+  __block NSData *responseData = suppliedData;
+  __block NSError *responseError = suppliedError;
+
+  // This method does the test simulation of callbacks once the upload
+  // and download data are known.
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    // Get copies of ivars we'll access in async invocations.  This simulation assumes
+    // they won't change during fetcher execution.
+    NSURL *destinationFileURL = _destinationFileURL;
+    GTMSessionFetcherWillRedirectBlock willRedirectBlock = _willRedirectBlock;
+    GTMSessionFetcherDidReceiveResponseBlock didReceiveResponseBlock = _didReceiveResponseBlock;
+    GTMSessionFetcherSendProgressBlock sendProgressBlock = _sendProgressBlock;
+    GTMSessionFetcherDownloadProgressBlock downloadProgressBlock = _downloadProgressBlock;
+    GTMSessionFetcherAccumulateDataBlock accumulateDataBlock = _accumulateDataBlock;
+    GTMSessionFetcherReceivedProgressBlock receivedProgressBlock = _receivedProgressBlock;
+    GTMSessionFetcherWillCacheURLResponseBlock willCacheURLResponseBlock =
+        _willCacheURLResponseBlock;
+
+    // Simulate receipt of redirection.
+    if (willRedirectBlock) {
+      [self invokeOnCallbackUnsynchronizedQueueAfterUserStopped:YES
+                                                          block:^{
+          willRedirectBlock((NSHTTPURLResponse *)response, _request,
+                             ^(NSURLRequest *redirectRequest) {
+              // For simulation, we'll assume the app will just continue.
+          });
+      }];
+    }
+
+    // If the fetcher has a challenge block, simulate a challenge.
+    //
+    // It might be nice to eventually let the user determine which testBlock
+    // fetches get challenged rather than always executing the supplied
+    // challenge block.
+    if (_challengeBlock) {
+      [self invokeOnCallbackUnsynchronizedQueueAfterUserStopped:YES
+                                                          block:^{
+        if (_challengeBlock) {
+          NSURL *requestURL = _request.URL;
+          NSString *host = requestURL.host;
+          NSURLProtectionSpace *pspace =
+              [[NSURLProtectionSpace alloc] initWithHost:host
+                                                    port:requestURL.port.integerValue
+                                                protocol:requestURL.scheme
+                                                   realm:nil
+                                    authenticationMethod:NSURLAuthenticationMethodHTTPBasic];
+          id<NSURLAuthenticationChallengeSender> unusedSender =
+              (id<NSURLAuthenticationChallengeSender>)[NSNull null];
+          NSURLAuthenticationChallenge *challenge =
+              [[NSURLAuthenticationChallenge alloc] initWithProtectionSpace:pspace
+                                                         proposedCredential:nil
+                                                       previousFailureCount:0
+                                                            failureResponse:nil
+                                                                      error:nil
+                                                                     sender:unusedSender];
+          _challengeBlock(self, challenge, ^(NSURLSessionAuthChallengeDisposition disposition,
+                                             NSURLCredential * GTM_NULLABLE_TYPE credential){
+            // We could change the responseData and responseError based on the disposition,
+            // but it's easier for apps to just supply the expected data and error
+            // directly to the test block. So this simulation ignores the disposition.
+          });
+        }
+      }];
+    }
+
+    // Simulate receipt of an initial response.
+    if (didReceiveResponseBlock) {
+      [self invokeOnCallbackUnsynchronizedQueueAfterUserStopped:YES
+                                                          block:^{
+          didReceiveResponseBlock(response, ^(NSURLSessionResponseDisposition desiredDisposition) {
+            // For simulation, we'll assume the disposition is to continue.
+          });
+      }];
+    }
+
+    // Simulate reporting send progress.
+    if (sendProgressBlock) {
+      [self simulateByteTransferReportWithDataLength:(int64_t)bodyData.length
+                                               block:^(int64_t bytesSent,
+                                                       int64_t totalBytesSent,
+                                                       int64_t totalBytesExpectedToSend) {
+          // This is invoked on the callback queue unless stopped.
+          sendProgressBlock(bytesSent, totalBytesSent, totalBytesExpectedToSend);
+      }];
+    }
+
+    if (destinationFileURL) {
+      // Simulate download to file progress.
+      if (downloadProgressBlock) {
+        [self simulateByteTransferReportWithDataLength:(int64_t)responseData.length
+                                                 block:^(int64_t bytesDownloaded,
+                                                         int64_t totalBytesDownloaded,
+                                                         int64_t totalBytesExpectedToDownload) {
+            // This is invoked on the callback queue unless stopped.
+            downloadProgressBlock(bytesDownloaded, totalBytesDownloaded,
+                                  totalBytesExpectedToDownload);
+        }];
+      }
+
+      NSError *writeError;
+      [responseData writeToURL:destinationFileURL
+                       options:NSDataWritingAtomic
+                         error:&writeError];
+      if (writeError) {
+        // Tell the test code that writing failed.
+        responseError = writeError;
+      }
+    } else {
+      // Simulate download to NSData progress.
+      if (accumulateDataBlock) {
+        if (responseData) {
+          [self invokeOnCallbackQueueUnlessStopped:^{
+            accumulateDataBlock(responseData);
+          }];
+        }
+      } else {
+        _downloadedData = [responseData mutableCopy];
+      }
+
+      if (receivedProgressBlock) {
+        [self simulateByteTransferReportWithDataLength:(int64_t)responseData.length
+                                                 block:^(int64_t bytesReceived,
+                                                         int64_t totalBytesReceived,
+                                                         int64_t totalBytesExpectedToReceive) {
+            // This is invoked on the callback queue unless stopped.
+            receivedProgressBlock(bytesReceived, totalBytesReceived);
+         }];
+      }
+
+      if (willCacheURLResponseBlock) {
+        // Simulate letting the client inspect and alter the cached response.
+        NSData *cachedData = responseData ?: [[NSData alloc] init];  // Always have non-nil data.
+        NSCachedURLResponse *cachedResponse =
+            [[NSCachedURLResponse alloc] initWithResponse:response
+                                                     data:cachedData];
+        [self invokeOnCallbackUnsynchronizedQueueAfterUserStopped:YES
+                                                            block:^{
+            willCacheURLResponseBlock(cachedResponse, ^(NSCachedURLResponse *responseToCache){
+                // The app may provide an alternative response, or nil to defeat caching.
+            });
+        }];
+      }
+    }
+    _response = response;
+  }  // @synchronized(self)
+
+  NSOperationQueue *queue = self.sessionDelegateQueue;
+  [queue addOperationWithBlock:^{
+    // Rather than invoke failToBeginFetchWithError: we want to simulate completion of
+    // a connection that started and ended, so we'll call down to finishWithError:
+    NSInteger status = responseError ? responseError.code : 200;
+    if (status >= 200 && status <= 399) {
+      [self finishWithError:nil shouldRetry:NO];
+    } else {
+      [self shouldRetryNowForStatus:status
+                              error:responseError
+                   forceAssumeRetry:NO
+                           response:^(BOOL shouldRetry) {
+          [self finishWithError:responseError shouldRetry:shouldRetry];
+      }];
+    }
+  }];
+}
+
+#endif  // !GTM_DISABLE_FETCHER_TEST_BLOCK
+
+- (void)setSessionTask:(NSURLSessionTask *)sessionTask {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_sessionTask != sessionTask) {
+      _sessionTask = sessionTask;
+      if (_sessionTask) {
+        // Request could be nil on restoring this fetcher from a background session.
+        if (!_request) {
+          _request = [_sessionTask.originalRequest mutableCopy];
+        }
+      }
+    }
+  }  // @synchronized(self)
+}
+
+- (NSURLSessionTask * GTM_NULLABLE_TYPE)sessionTask {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _sessionTask;
+  }  // @synchronized(self)
+}
+
++ (NSUserDefaults *)fetcherUserDefaults {
+  static NSUserDefaults *gFetcherUserDefaults = nil;
+
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    Class fetcherUserDefaultsClass = NSClassFromString(@"GTMSessionFetcherUserDefaultsFactory");
+    if (fetcherUserDefaultsClass) {
+      gFetcherUserDefaults = [fetcherUserDefaultsClass fetcherUserDefaults];
+    } else {
+      gFetcherUserDefaults = [NSUserDefaults standardUserDefaults];
+    }
+  });
+  return gFetcherUserDefaults;
+}
+
+- (void)addPersistedBackgroundSessionToDefaults {
+  NSString *sessionIdentifier = self.sessionIdentifier;
+  if (!sessionIdentifier) {
+    return;
+  }
+  NSArray *oldBackgroundSessions = [[self class] activePersistedBackgroundSessions];
+  if ([oldBackgroundSessions containsObject:_sessionIdentifier]) {
+    return;
+  }
+  NSMutableArray *newBackgroundSessions =
+      [NSMutableArray arrayWithArray:oldBackgroundSessions];
+  [newBackgroundSessions addObject:sessionIdentifier];
+  GTM_LOG_BACKGROUND_SESSION(@"Add to background sessions: %@", newBackgroundSessions);
+
+  NSUserDefaults *userDefaults = [[self class] fetcherUserDefaults];
+  [userDefaults setObject:newBackgroundSessions
+                   forKey:kGTMSessionFetcherPersistedDestinationKey];
+  [userDefaults synchronize];
+}
+
+- (void)removePersistedBackgroundSessionFromDefaults {
+  NSString *sessionIdentifier = self.sessionIdentifier;
+  if (!sessionIdentifier) return;
+
+  NSArray *oldBackgroundSessions = [[self class] activePersistedBackgroundSessions];
+  if (!oldBackgroundSessions) {
+    return;
+  }
+  NSMutableArray *newBackgroundSessions =
+      [NSMutableArray arrayWithArray:oldBackgroundSessions];
+  NSUInteger sessionIndex = [newBackgroundSessions indexOfObject:sessionIdentifier];
+  if (sessionIndex == NSNotFound) {
+    return;
+  }
+  [newBackgroundSessions removeObjectAtIndex:sessionIndex];
+  GTM_LOG_BACKGROUND_SESSION(@"Remove from background sessions: %@", newBackgroundSessions);
+
+  NSUserDefaults *userDefaults = [[self class] fetcherUserDefaults];
+  if (newBackgroundSessions.count == 0) {
+    [userDefaults removeObjectForKey:kGTMSessionFetcherPersistedDestinationKey];
+  } else {
+    [userDefaults setObject:newBackgroundSessions
+                     forKey:kGTMSessionFetcherPersistedDestinationKey];
+  }
+  [userDefaults synchronize];
+}
+
++ (GTM_NULLABLE NSArray *)activePersistedBackgroundSessions {
+  NSUserDefaults *userDefaults = [[self class] fetcherUserDefaults];
+  NSArray *oldBackgroundSessions =
+      [userDefaults arrayForKey:kGTMSessionFetcherPersistedDestinationKey];
+  if (oldBackgroundSessions.count == 0) {
+    return nil;
+  }
+  NSMutableArray *activeBackgroundSessions = nil;
+  NSMapTable *sessionIdentifierToFetcherMap = [self sessionIdentifierToFetcherMap];
+  for (NSString *sessionIdentifier in oldBackgroundSessions) {
+    GTMSessionFetcher *fetcher = [sessionIdentifierToFetcherMap objectForKey:sessionIdentifier];
+    if (fetcher) {
+      if (!activeBackgroundSessions) {
+        activeBackgroundSessions = [[NSMutableArray alloc] init];
+      }
+      [activeBackgroundSessions addObject:sessionIdentifier];
+    }
+  }
+  return activeBackgroundSessions;
+}
+
++ (NSArray *)fetchersForBackgroundSessions {
+  NSUserDefaults *userDefaults = [[self class] fetcherUserDefaults];
+  NSArray *backgroundSessions =
+      [userDefaults arrayForKey:kGTMSessionFetcherPersistedDestinationKey];
+  NSMapTable *sessionIdentifierToFetcherMap = [self sessionIdentifierToFetcherMap];
+  NSMutableArray *fetchers = [NSMutableArray array];
+  for (NSString *sessionIdentifier in backgroundSessions) {
+    GTMSessionFetcher *fetcher = [sessionIdentifierToFetcherMap objectForKey:sessionIdentifier];
+    if (!fetcher) {
+      fetcher = [self fetcherWithSessionIdentifier:sessionIdentifier];
+      GTMSESSION_ASSERT_DEBUG(fetcher != nil,
+                              @"Unexpected invalid session identifier: %@", sessionIdentifier);
+      [fetcher beginFetchWithCompletionHandler:nil];
+    }
+    GTM_LOG_BACKGROUND_SESSION(@"%@ restoring session %@ by creating fetcher %@ %p",
+                               [self class], sessionIdentifier, fetcher, fetcher);
+    if (fetcher != nil) {
+      [fetchers addObject:fetcher];
+    }
+  }
+  return fetchers;
+}
+
+#if TARGET_OS_IPHONE
++ (void)application:(UIApplication *)application
+    handleEventsForBackgroundURLSession:(NSString *)identifier
+                      completionHandler:(GTMSessionFetcherSystemCompletionHandler)completionHandler {
+  GTMSessionFetcher *fetcher = [self fetcherWithSessionIdentifier:identifier];
+  if (fetcher != nil) {
+    fetcher.systemCompletionHandler = completionHandler;
+  } else {
+    GTM_LOG_BACKGROUND_SESSION(@"%@ did not create background session identifier: %@",
+                               [self class], identifier);
+  }
+}
+#endif
+
+- (NSString * GTM_NULLABLE_TYPE)sessionIdentifier {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _sessionIdentifier;
+  }  // @synchronized(self)
+}
+
+- (void)setSessionIdentifier:(NSString *)sessionIdentifier {
+  GTMSESSION_ASSERT_DEBUG(sessionIdentifier != nil, @"Invalid session identifier");
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    GTMSESSION_ASSERT_DEBUG(!_session, @"Unable to set session identifier after session created");
+    _sessionIdentifier = [sessionIdentifier copy];
+    _usingBackgroundSession = YES;
+    _canShareSession = NO;
+    [self restoreDefaultStateForSessionIdentifierMetadata];
+  }  // @synchronized(self)
+}
+
+- (void)setSessionIdentifierInternal:(GTM_NULLABLE NSString *)sessionIdentifier {
+  // This internal method only does a synchronized set of the session identifier.
+  // It does not have side effects on the background session, shared session, or
+  // session identifier metadata.
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _sessionIdentifier = [sessionIdentifier copy];
+  }  // @synchronized(self)
+}
+
+- (NSDictionary * GTM_NULLABLE_TYPE)sessionUserInfo {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_sessionUserInfo == nil) {
+      // We'll return the metadata dictionary with internal keys removed. This avoids the user
+      // re-using the userInfo dictionary later and accidentally including the internal keys.
+      NSMutableDictionary *metadata = [[self sessionIdentifierMetadataUnsynchronized] mutableCopy];
+      NSSet *keysToRemove = [metadata keysOfEntriesPassingTest:^BOOL(id key, id obj, BOOL *stop) {
+          return [key hasPrefix:@"_"];
+      }];
+      [metadata removeObjectsForKeys:[keysToRemove allObjects]];
+      if (metadata.count > 0) {
+        _sessionUserInfo = metadata;
+      }
+    }
+    return _sessionUserInfo;
+  }  // @synchronized(self)
+}
+
+- (void)setSessionUserInfo:(NSDictionary * GTM_NULLABLE_TYPE)dictionary {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    GTMSESSION_ASSERT_DEBUG(_sessionIdentifier == nil, @"Too late to assign userInfo");
+    _sessionUserInfo = dictionary;
+  }  // @synchronized(self)
+}
+
+- (GTM_NULLABLE NSDictionary *)sessionIdentifierDefaultMetadata {
+  GTMSessionCheckSynchronized(self);
+
+  NSMutableDictionary *defaultUserInfo = [[NSMutableDictionary alloc] init];
+  if (_destinationFileURL) {
+    defaultUserInfo[kGTMSessionIdentifierDestinationFileURLMetadataKey] =
+        [_destinationFileURL absoluteString];
+  }
+  if (_bodyFileURL) {
+    defaultUserInfo[kGTMSessionIdentifierBodyFileURLMetadataKey] = [_bodyFileURL absoluteString];
+  }
+  return (defaultUserInfo.count > 0) ? defaultUserInfo : nil;
+}
+
+- (void)restoreDefaultStateForSessionIdentifierMetadata {
+  GTMSessionCheckSynchronized(self);
+
+  NSDictionary *metadata = [self sessionIdentifierMetadataUnsynchronized];
+  NSString *destinationFileURLString = metadata[kGTMSessionIdentifierDestinationFileURLMetadataKey];
+  if (destinationFileURLString) {
+    _destinationFileURL = [NSURL URLWithString:destinationFileURLString];
+    GTM_LOG_BACKGROUND_SESSION(@"Restoring destination file URL: %@", _destinationFileURL);
+  }
+  NSString *bodyFileURLString = metadata[kGTMSessionIdentifierBodyFileURLMetadataKey];
+  if (bodyFileURLString) {
+    _bodyFileURL = [NSURL URLWithString:bodyFileURLString];
+    GTM_LOG_BACKGROUND_SESSION(@"Restoring body file URL: %@", _bodyFileURL);
+  }
+}
+
+- (NSDictionary * GTM_NULLABLE_TYPE)sessionIdentifierMetadata {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return [self sessionIdentifierMetadataUnsynchronized];
+  }
+}
+
+- (NSDictionary * GTM_NULLABLE_TYPE)sessionIdentifierMetadataUnsynchronized {
+  GTMSessionCheckSynchronized(self);
+
+  // Session Identifier format: "com.google.<ClassName>_<UUID>_<Metadata in JSON format>
+  if (!_sessionIdentifier) {
+    return nil;
+  }
+  NSScanner *metadataScanner = [NSScanner scannerWithString:_sessionIdentifier];
+  [metadataScanner setCharactersToBeSkipped:nil];
+  NSString *metadataString;
+  NSString *uuid;
+  if ([metadataScanner scanUpToString:@"_" intoString:NULL] &&
+      [metadataScanner scanString:@"_" intoString:NULL] &&
+      [metadataScanner scanUpToString:@"_" intoString:&uuid] &&
+      [metadataScanner scanString:@"_" intoString:NULL] &&
+      [metadataScanner scanUpToString:@"\n" intoString:&metadataString]) {
+    _sessionIdentifierUUID = uuid;
+    NSData *metadataData = [metadataString dataUsingEncoding:NSUTF8StringEncoding];
+    NSError *error;
+    NSDictionary *metadataDict =
+      [NSJSONSerialization JSONObjectWithData:metadataData
+                                      options:0
+                                        error:&error];
+    GTM_LOG_BACKGROUND_SESSION(@"User Info from session identifier: %@ %@",
+                               metadataDict, error ? error : @"");
+    return metadataDict;
+  }
+  return nil;
+}
+
+- (NSString *)createSessionIdentifierWithMetadata:(NSDictionary * GTM_NULLABLE_TYPE)metadataToInclude {
+  NSString *result;
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    // Session Identifier format: "com.google.<ClassName>_<UUID>_<Metadata in JSON format>
+    GTMSESSION_ASSERT_DEBUG(!_sessionIdentifier, @"Session identifier already created");
+    _sessionIdentifierUUID = [[NSUUID UUID] UUIDString];
+    _sessionIdentifier =
+      [NSString stringWithFormat:@"%@_%@", kGTMSessionIdentifierPrefix, _sessionIdentifierUUID];
+    // Start with user-supplied keys so they cannot accidentally override the fetcher's keys.
+    NSMutableDictionary *metadataDict =
+        [NSMutableDictionary dictionaryWithDictionary:(NSDictionary * GTM_NONNULL_TYPE)_sessionUserInfo];
+
+    if (metadataToInclude) {
+      [metadataDict addEntriesFromDictionary:(NSDictionary *)metadataToInclude];
+    }
+    NSDictionary *defaultMetadataDict = [self sessionIdentifierDefaultMetadata];
+    if (defaultMetadataDict) {
+      [metadataDict addEntriesFromDictionary:defaultMetadataDict];
+    }
+    if (metadataDict.count > 0) {
+      NSData *metadataData = [NSJSONSerialization dataWithJSONObject:metadataDict
+                                                             options:0
+                                                               error:NULL];
+      GTMSESSION_ASSERT_DEBUG(metadataData != nil,
+                              @"Session identifier user info failed to convert to JSON");
+      if (metadataData.length > 0) {
+        NSString *metadataString = [[NSString alloc] initWithData:metadataData
+                                                         encoding:NSUTF8StringEncoding];
+        _sessionIdentifier =
+          [_sessionIdentifier stringByAppendingFormat:@"_%@", metadataString];
+      }
+    }
+    _didCreateSessionIdentifier = YES;
+    result = _sessionIdentifier;
+  }  // @synchronized(self)
+  return result;
+}
+
+- (void)failToBeginFetchWithError:(NSError *)error {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _hasStoppedFetching = YES;
+  }
+
+  if (error == nil) {
+    error = [NSError errorWithDomain:kGTMSessionFetcherErrorDomain
+                                code:GTMSessionFetcherErrorDownloadFailed
+                            userInfo:nil];
+  }
+
+  [self invokeFetchCallbacksOnCallbackQueueWithData:nil
+                                              error:error];
+  [self releaseCallbacks];
+
+  [_service fetcherDidStop:self];
+
+  self.authorizer = nil;
+}
+
++ (GTMSessionCookieStorage *)staticCookieStorage {
+  static GTMSessionCookieStorage *gCookieStorage = nil;
+
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    gCookieStorage = [[GTMSessionCookieStorage alloc] init];
+  });
+  return gCookieStorage;
+}
+
+#if GTM_BACKGROUND_TASK_FETCHING
+
+- (void)endBackgroundTask {
+  // Whenever the connection stops or background execution expires,
+  // we need to tell UIApplication we're done.
+  //
+  // We'll wait on _callbackGroup to ensure that any callbacks in flight have executed,
+  // and that we access backgroundTaskIdentifier on the main thread, as happens when the
+  // task has expired.
+  UIBackgroundTaskIdentifier bgTaskID = self.backgroundTaskIdentifier;
+  if (bgTaskID != UIBackgroundTaskInvalid) {
+    self.backgroundTaskIdentifier = UIBackgroundTaskInvalid;
+
+    id<GTMUIApplicationProtocol> app = [[self class] fetcherUIApplication];
+    [app endBackgroundTask:bgTaskID];
+  }
+}
+
+#endif // GTM_BACKGROUND_TASK_FETCHING
+
+- (void)authorizeRequest {
+  GTMSessionCheckNotSynchronized(self);
+
+  id authorizer = self.authorizer;
+  SEL asyncAuthSel = @selector(authorizeRequest:delegate:didFinishSelector:);
+  if ([authorizer respondsToSelector:asyncAuthSel]) {
+    SEL callbackSel = @selector(authorizer:request:finishedWithError:);
+    NSMutableURLRequest *mutableRequest = [self.request mutableCopy];
+    [authorizer authorizeRequest:mutableRequest
+                        delegate:self
+               didFinishSelector:callbackSel];
+  } else {
+    GTMSESSION_ASSERT_DEBUG(authorizer == nil, @"invalid authorizer for fetch");
+
+    // No authorizing possible, and authorizing happens only after any delay;
+    // just begin fetching
+    [self beginFetchMayDelay:NO
+                mayAuthorize:NO];
+  }
+}
+
+- (void)authorizer:(id<GTMFetcherAuthorizationProtocol>)auth
+           request:(NSMutableURLRequest *)authorizedRequest
+ finishedWithError:(NSError *)error {
+  GTMSessionCheckNotSynchronized(self);
+
+  if (error != nil) {
+    // We can't fetch without authorization
+    [self failToBeginFetchWithError:error];
+  } else {
+    @synchronized(self) {
+      _request = authorizedRequest;
+    }
+    [self beginFetchMayDelay:NO
+                mayAuthorize:NO];
+  }
+}
+
+
+- (BOOL)canFetchWithBackgroundSession {
+  // Subclasses may override.
+  return YES;
+}
+
+// Returns YES if the fetcher has been started and has not yet stopped.
+//
+// Fetching includes waiting for authorization or for retry, waiting to be allowed by the
+// service object to start the request, and actually fetching the request.
+- (BOOL)isFetching {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return [self isFetchingUnsynchronized];
+  }
+}
+
+- (BOOL)isFetchingUnsynchronized {
+  GTMSessionCheckSynchronized(self);
+
+  BOOL hasBegun = (_initialBeginFetchDate != nil);
+  return hasBegun && !_hasStoppedFetching;
+}
+
+- (NSURLResponse * GTM_NULLABLE_TYPE)response {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    NSURLResponse *response = [self responseUnsynchronized];
+    return response;
+  }  // @synchronized(self)
+}
+
+- (NSURLResponse * GTM_NULLABLE_TYPE)responseUnsynchronized {
+  GTMSessionCheckSynchronized(self);
+
+  NSURLResponse *response = _sessionTask.response;
+  if (!response) response = _response;
+  return response;
+}
+
+- (NSInteger)statusCode {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    NSInteger statusCode = [self statusCodeUnsynchronized];
+    return statusCode;
+  }  // @synchronized(self)
+}
+
+- (NSInteger)statusCodeUnsynchronized {
+  GTMSessionCheckSynchronized(self);
+
+  NSURLResponse *response = [self responseUnsynchronized];
+  NSInteger statusCode;
+
+  if ([response respondsToSelector:@selector(statusCode)]) {
+    statusCode = [(NSHTTPURLResponse *)response statusCode];
+  } else {
+    //  Default to zero, in hopes of hinting "Unknown" (we can't be
+    //  sure that things are OK enough to use 200).
+    statusCode = 0;
+  }
+  return statusCode;
+}
+
+- (NSDictionary * GTM_NULLABLE_TYPE)responseHeaders {
+  GTMSessionCheckNotSynchronized(self);
+
+  NSURLResponse *response = self.response;
+  if ([response respondsToSelector:@selector(allHeaderFields)]) {
+    NSDictionary *headers = [(NSHTTPURLResponse *)response allHeaderFields];
+    return headers;
+  }
+  return nil;
+}
+
+- (NSDictionary * GTM_NULLABLE_TYPE)responseHeadersUnsynchronized {
+  GTMSessionCheckSynchronized(self);
+
+  NSURLResponse *response = [self responseUnsynchronized];
+  if ([response respondsToSelector:@selector(allHeaderFields)]) {
+    NSDictionary *headers = [(NSHTTPURLResponse *)response allHeaderFields];
+    return headers;
+  }
+  return nil;
+}
+
+- (void)releaseCallbacks {
+  // Avoid releasing blocks in the sync section since objects dealloc'd by
+  // the blocks being released may call back into the fetcher or fetcher
+  // service.
+  dispatch_queue_t NS_VALID_UNTIL_END_OF_SCOPE holdCallbackQueue;
+  GTMSessionFetcherCompletionHandler NS_VALID_UNTIL_END_OF_SCOPE holdCompletionHandler;
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    holdCallbackQueue = _callbackQueue;
+    holdCompletionHandler = _completionHandler;
+
+    _callbackQueue = nil;
+    _completionHandler = nil;  // Setter overridden in upload. Setter assumed to be used externally.
+  }
+
+  // Set local callback pointers to nil here rather than let them release at the end of the scope
+  // to make any problems due to the blocks being released be a bit more obvious in a stack trace.
+  holdCallbackQueue = nil;
+  holdCompletionHandler = nil;
+
+  self.configurationBlock = nil;
+  self.didReceiveResponseBlock = nil;
+  self.challengeBlock = nil;
+  self.willRedirectBlock = nil;
+  self.sendProgressBlock = nil;
+  self.receivedProgressBlock = nil;
+  self.downloadProgressBlock = nil;
+  self.accumulateDataBlock = nil;
+  self.willCacheURLResponseBlock = nil;
+  self.retryBlock = nil;
+  self.testBlock = nil;
+  self.resumeDataBlock = nil;
+}
+
+- (void)forgetSessionIdentifierForFetcher {
+  GTMSessionCheckSynchronized(self);
+  [self forgetSessionIdentifierForFetcherWithoutSyncCheck];
+}
+
+- (void)forgetSessionIdentifierForFetcherWithoutSyncCheck {
+  // This should be called inside a @synchronized block (except during dealloc.)
+  if (_sessionIdentifier) {
+    NSMapTable *sessionIdentifierToFetcherMap = [[self class] sessionIdentifierToFetcherMap];
+    [sessionIdentifierToFetcherMap removeObjectForKey:_sessionIdentifier];
+    _sessionIdentifier = nil;
+    _didCreateSessionIdentifier = NO;
+  }
+}
+
+// External stop method
+- (void)stopFetching {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    // Prevent enqueued callbacks from executing.
+    _userStoppedFetching = YES;
+  }  // @synchronized(self)
+  [self stopFetchReleasingCallbacks:YES];
+}
+
+// Cancel the fetch of the URL that's currently in progress.
+//
+// If shouldReleaseCallbacks is NO then the fetch will be retried so the callbacks
+// need to still be retained.
+- (void)stopFetchReleasingCallbacks:(BOOL)shouldReleaseCallbacks {
+  [self removePersistedBackgroundSessionFromDefaults];
+
+  id<GTMSessionFetcherServiceProtocol> service;
+  NSMutableURLRequest *request;
+
+  // If the task or the retry timer is all that's retaining the fetcher,
+  // we want to be sure this instance survives stopping at least long enough for
+  // the stack to unwind.
+  __autoreleasing GTMSessionFetcher *holdSelf = self;
+
+  BOOL hasCanceledTask = NO;
+
+  [holdSelf destroyRetryTimer];
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _hasStoppedFetching = YES;
+
+    service = _service;
+    request = _request;
+
+    if (_sessionTask) {
+      // In case cancelling the task or session calls this recursively, we want
+      // to ensure that we'll only release the task and delegate once,
+      // so first set _sessionTask to nil
+      //
+      // This may be called in a callback from the task, so use autorelease to avoid
+      // releasing the task in its own callback.
+      __autoreleasing NSURLSessionTask *oldTask = _sessionTask;
+      if (!_isUsingTestBlock) {
+        _response = _sessionTask.response;
+      }
+      _sessionTask = nil;
+
+      if ([oldTask state] != NSURLSessionTaskStateCompleted) {
+        // For download tasks, when the fetch is stopped, we may provide resume data that can
+        // be used to create a new session.
+        BOOL mayResume = (_resumeDataBlock
+                          && [oldTask respondsToSelector:@selector(cancelByProducingResumeData:)]);
+        if (!mayResume) {
+          [oldTask cancel];
+          // A side effect of stopping the task is that URLSession:task:didCompleteWithError:
+          // will be invoked asynchronously on the delegate queue.
+        } else {
+          void (^resumeBlock)(NSData *) = _resumeDataBlock;
+          _resumeDataBlock = nil;
+
+          // Save callbackQueue since releaseCallbacks clears it.
+          dispatch_queue_t callbackQueue = _callbackQueue;
+          dispatch_group_enter(_callbackGroup);
+          [(NSURLSessionDownloadTask *)oldTask cancelByProducingResumeData:^(NSData *resumeData) {
+              [self invokeOnCallbackQueue:callbackQueue
+                         afterUserStopped:YES
+                                    block:^{
+                  resumeBlock(resumeData);
+                  dispatch_group_leave(_callbackGroup);
+              }];
+          }];
+        }
+        hasCanceledTask = YES;
+      }
+    }
+
+    // If the task was canceled, wait until the URLSession:task:didCompleteWithError: to call
+    // finishTasksAndInvalidate, since calling it immediately tends to crash, see radar 18471901.
+    if (_session) {
+      BOOL shouldInvalidate = _shouldInvalidateSession;
+#if TARGET_OS_IPHONE
+      // Don't invalidate if we've got a systemCompletionHandler, since
+      // URLSessionDidFinishEventsForBackgroundURLSession: won't be called if invalidated.
+      shouldInvalidate = shouldInvalidate && !self.systemCompletionHandler;
+#endif
+      if (shouldInvalidate) {
+        __autoreleasing NSURLSession *oldSession = _session;
+        _session = nil;
+
+        if (!hasCanceledTask) {
+          [oldSession finishTasksAndInvalidate];
+        } else {
+          _sessionNeedingInvalidation = oldSession;
+        }
+      }
+    }
+  }  // @synchronized(self)
+
+  // send the stopped notification
+  [self sendStopNotificationIfNeeded];
+
+  [_authorizer stopAuthorizationForRequest:request];
+
+  if (shouldReleaseCallbacks) {
+    [self releaseCallbacks];
+
+    self.authorizer = nil;
+  }
+
+  [service fetcherDidStop:self];
+
+#if GTM_BACKGROUND_TASK_FETCHING
+  [self endBackgroundTask];
+#endif
+}
+
+- (void)setStopNotificationNeeded:(BOOL)flag {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _isStopNotificationNeeded = flag;
+  }  // @synchronized(self)
+}
+
+- (void)sendStopNotificationIfNeeded {
+  BOOL sendNow = NO;
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_isStopNotificationNeeded) {
+      _isStopNotificationNeeded = NO;
+      sendNow = YES;
+    }
+  }  // @synchronized(self)
+
+  if (sendNow) {
+    [self postNotificationOnMainThreadWithName:kGTMSessionFetcherStoppedNotification
+                                      userInfo:nil
+                                  requireAsync:NO];
+  }
+}
+
+- (void)retryFetch {
+  [self stopFetchReleasingCallbacks:NO];
+
+  GTMSessionFetcherCompletionHandler completionHandler;
+
+  // A retry will need a configuration with a fresh session identifier.
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_sessionIdentifier && _didCreateSessionIdentifier) {
+      [self forgetSessionIdentifierForFetcher];
+      _configuration = nil;
+    }
+
+    if (_canShareSession) {
+      // Force a grab of the current session from the fetcher service in case
+      // the service's old one has become invalid.
+      _session = nil;
+    }
+
+    completionHandler = _completionHandler;
+  }  // @synchronized(self)
+
+  [self beginFetchWithCompletionHandler:completionHandler];
+}
+
+- (BOOL)waitForCompletionWithTimeout:(NSTimeInterval)timeoutInSeconds {
+  // Uncovered in upload fetcher testing, because the chunk fetcher is being waited on, and gets
+  // released by the upload code. The uploader just holds onto it with an ivar, and that gets
+  // nilled in the chunk fetcher callback.
+  // Used once in while loop just to avoid unused variable compiler warning.
+  __autoreleasing GTMSessionFetcher *holdSelf = self;
+
+  NSDate *giveUpDate = [NSDate dateWithTimeIntervalSinceNow:timeoutInSeconds];
+
+  BOOL shouldSpinRunLoop = ([NSThread isMainThread] &&
+                            (!self.callbackQueue
+                             || self.callbackQueue == dispatch_get_main_queue()));
+  BOOL expired = NO;
+
+  // Loop until the callbacks have been called and released, and until
+  // the connection is no longer pending, until there are no callback dispatches
+  // in flight, or until the timeout has expired.
+  int64_t delta = (int64_t)(100 * NSEC_PER_MSEC);  // 100 ms
+  while (1) {
+    BOOL isTaskInProgress = (holdSelf->_sessionTask
+                             && [_sessionTask state] != NSURLSessionTaskStateCompleted);
+    BOOL needsToCallCompletion = (_completionHandler != nil);
+    BOOL isCallbackInProgress = (_callbackGroup
+        && dispatch_group_wait(_callbackGroup, dispatch_time(DISPATCH_TIME_NOW, delta)));
+
+    if (!isTaskInProgress && !needsToCallCompletion && !isCallbackInProgress) break;
+
+    expired = ([giveUpDate timeIntervalSinceNow] < 0);
+    if (expired) {
+      GTMSESSION_LOG_DEBUG(@"GTMSessionFetcher waitForCompletionWithTimeout:%0.1f expired -- "
+                           @"%@%@%@", timeoutInSeconds,
+                           isTaskInProgress ? @"taskInProgress " : @"",
+                           needsToCallCompletion ? @"needsToCallCompletion " : @"",
+                           isCallbackInProgress ? @"isCallbackInProgress" : @"");
+      break;
+    }
+
+    // Run the current run loop 1/1000 of a second to give the networking
+    // code a chance to work
+    const NSTimeInterval kSpinInterval = 0.001;
+    if (shouldSpinRunLoop) {
+      NSDate *stopDate = [NSDate dateWithTimeIntervalSinceNow:kSpinInterval];
+      [[NSRunLoop currentRunLoop] runUntilDate:stopDate];
+    } else {
+      [NSThread sleepForTimeInterval:kSpinInterval];
+    }
+  }
+  return !expired;
+}
+
++ (void)setGlobalTestBlock:(GTMSessionFetcherTestBlock GTM_NULLABLE_TYPE)block {
+#if GTM_DISABLE_FETCHER_TEST_BLOCK
+  GTMSESSION_ASSERT_DEBUG(block == nil, @"test blocks disabled");
+#endif
+  gGlobalTestBlock = [block copy];
+}
+
+#if TARGET_OS_IPHONE
+
+static GTM_NULLABLE_TYPE id<GTMUIApplicationProtocol> gSubstituteUIApp;
+
++ (void)setSubstituteUIApplication:(nullable id<GTMUIApplicationProtocol>)app {
+  gSubstituteUIApp = app;
+}
+
++ (nullable id<GTMUIApplicationProtocol>)substituteUIApplication {
+  return gSubstituteUIApp;
+}
+
++ (nullable id<GTMUIApplicationProtocol>)fetcherUIApplication {
+  id<GTMUIApplicationProtocol> app = gSubstituteUIApp;
+  if (app) return app;
+
+  // Some projects use GTM_BACKGROUND_TASK_FETCHING to avoid compile-time references
+  // to UIApplication.
+#if GTM_BACKGROUND_TASK_FETCHING
+  return (id<GTMUIApplicationProtocol>) [UIApplication sharedApplication];
+#else
+  return nil;
+#endif
+}
+#endif //  TARGET_OS_IPHONE
+
+#pragma mark NSURLSession Delegate Methods
+
+// NSURLSession documentation indicates that redirectRequest can be passed to the handler
+// but empirically redirectRequest lacks the HTTP body, so passing it will break POSTs.
+// Instead, we construct a new request, a copy of the original, with overrides from the
+// redirect.
+
+- (void)URLSession:(NSURLSession *)session
+              task:(NSURLSessionTask *)task
+willPerformHTTPRedirection:(NSHTTPURLResponse *)redirectResponse
+        newRequest:(NSURLRequest *)redirectRequest
+ completionHandler:(void (^)(NSURLRequest * GTM_NULLABLE_TYPE))handler {
+  [self setSessionTask:task];
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSession:%@ task:%@ willPerformHTTPRedirection:%@ newRequest:%@",
+                           [self class], self, session, task, redirectResponse, redirectRequest);
+
+  if ([self userStoppedFetching]) {
+    handler(nil);
+    return;
+  }
+  if (redirectRequest && redirectResponse) {
+    // Copy the original request, including the body.
+    NSURLRequest *originalRequest = self.request;
+    NSMutableURLRequest *newRequest = [originalRequest mutableCopy];
+
+    // Disallow scheme changes (say, from https to http).
+    NSURL *originalRequestURL = originalRequest.URL;
+    NSURL *redirectRequestURL = redirectRequest.URL;
+
+    NSString *originalScheme = originalRequestURL.scheme;
+    NSString *redirectScheme = redirectRequestURL.scheme;
+
+    if (originalScheme != nil
+        && [originalScheme caseInsensitiveCompare:@"http"] == NSOrderedSame
+        && redirectScheme != nil
+        && [redirectScheme caseInsensitiveCompare:@"https"] == NSOrderedSame) {
+      // Allow the change from http to https.
+    } else {
+      // Disallow any other scheme changes.
+      redirectScheme = originalScheme;
+    }
+    // The new requests's URL overrides the original's URL.
+    NSURLComponents *components = [NSURLComponents componentsWithURL:redirectRequestURL
+                                             resolvingAgainstBaseURL:NO];
+    components.scheme = redirectScheme;
+    NSURL *newURL = components.URL;
+    [newRequest setURL:newURL];
+
+    // Any headers in the redirect override headers in the original.
+    NSDictionary *redirectHeaders = redirectRequest.allHTTPHeaderFields;
+    for (NSString *key in redirectHeaders) {
+      NSString *value = [redirectHeaders objectForKey:key];
+      [newRequest setValue:value forHTTPHeaderField:key];
+    }
+
+    redirectRequest = newRequest;
+
+      // Log the response we just received
+    [self setResponse:redirectResponse];
+    [self logNowWithError:nil];
+
+    GTMSessionFetcherWillRedirectBlock willRedirectBlock = self.willRedirectBlock;
+    if (willRedirectBlock) {
+      @synchronized(self) {
+        GTMSessionMonitorSynchronized(self);
+        [self invokeOnCallbackQueueAfterUserStopped:YES
+                                              block:^{
+            willRedirectBlock(redirectResponse, redirectRequest, ^(NSURLRequest *clientRequest) {
+
+                // Update the request for future logging.
+                [self updateMutableRequest:[clientRequest mutableCopy]];
+
+                handler(clientRequest);
+            });
+        }];
+      }  // @synchronized(self)
+      return;
+    }
+    // Continues here if the client did not provide a redirect block.
+
+    // Update the request for future logging.
+    [self updateMutableRequest:[redirectRequest mutableCopy]];
+  }
+  handler(redirectRequest);
+}
+
+- (void)URLSession:(NSURLSession *)session
+          dataTask:(NSURLSessionDataTask *)dataTask
+didReceiveResponse:(NSURLResponse *)response
+ completionHandler:(void (^)(NSURLSessionResponseDisposition disposition))handler {
+  [self setSessionTask:dataTask];
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSession:%@ dataTask:%@ didReceiveResponse:%@",
+                           [self class], self, session, dataTask, response);
+  void (^accumulateAndFinish)(NSURLSessionResponseDisposition) =
+      ^(NSURLSessionResponseDisposition dispositionValue) {
+      // This method is called when the server has determined that it
+      // has enough information to create the NSURLResponse
+      // it can be called multiple times, for example in the case of a
+      // redirect, so each time we reset the data.
+      @synchronized(self) {
+        GTMSessionMonitorSynchronized(self);
+
+        BOOL hadPreviousData = _downloadedLength > 0;
+
+        [_downloadedData setLength:0];
+        _downloadedLength = 0;
+
+        if (hadPreviousData && (dispositionValue != NSURLSessionResponseCancel)) {
+          // Tell the accumulate block to discard prior data.
+          GTMSessionFetcherAccumulateDataBlock accumulateBlock = _accumulateDataBlock;
+          if (accumulateBlock) {
+            [self invokeOnCallbackQueueUnlessStopped:^{
+                accumulateBlock(nil);
+            }];
+          }
+        }
+      }  // @synchronized(self)
+      handler(dispositionValue);
+  };
+
+  GTMSessionFetcherDidReceiveResponseBlock receivedResponseBlock;
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    receivedResponseBlock = _didReceiveResponseBlock;
+    if (receivedResponseBlock) {
+      // We will ultimately need to call back to NSURLSession's handler with the disposition value
+      // for this delegate method even if the user has stopped the fetcher.
+      [self invokeOnCallbackQueueAfterUserStopped:YES
+                                            block:^{
+        receivedResponseBlock(response, ^(NSURLSessionResponseDisposition desiredDisposition) {
+          accumulateAndFinish(desiredDisposition);
+        });
+      }];
+    }
+  }  // @synchronized(self)
+
+  if (receivedResponseBlock == nil) {
+    accumulateAndFinish(NSURLSessionResponseAllow);
+  }
+}
+
+- (void)URLSession:(NSURLSession *)session
+          dataTask:(NSURLSessionDataTask *)dataTask
+didBecomeDownloadTask:(NSURLSessionDownloadTask *)downloadTask {
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSession:%@ dataTask:%@ didBecomeDownloadTask:%@",
+                           [self class], self, session, dataTask, downloadTask);
+  [self setSessionTask:downloadTask];
+}
+
+
+- (void)URLSession:(NSURLSession *)session
+              task:(NSURLSessionTask *)task
+didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge
+ completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition,
+                             NSURLCredential * GTM_NULLABLE_TYPE credential))handler {
+  [self setSessionTask:task];
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSession:%@ task:%@ didReceiveChallenge:%@",
+                           [self class], self, session, task, challenge);
+
+  GTMSessionFetcherChallengeBlock challengeBlock = self.challengeBlock;
+  if (challengeBlock) {
+    // The fetcher user has provided custom challenge handling.
+    //
+    // We will ultimately need to call back to NSURLSession's handler with the disposition value
+    // for this delegate method even if the user has stopped the fetcher.
+    @synchronized(self) {
+      GTMSessionMonitorSynchronized(self);
+
+      [self invokeOnCallbackQueueAfterUserStopped:YES
+                                            block:^{
+        challengeBlock(self, challenge, handler);
+      }];
+    }
+  } else {
+    // No challenge block was provided by the client.
+    [self respondToChallenge:challenge
+           completionHandler:handler];
+  }
+}
+
+- (void)respondToChallenge:(NSURLAuthenticationChallenge *)challenge
+         completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition,
+                                     NSURLCredential * GTM_NULLABLE_TYPE credential))handler {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    NSInteger previousFailureCount = [challenge previousFailureCount];
+    if (previousFailureCount <= 2) {
+      NSURLProtectionSpace *protectionSpace = [challenge protectionSpace];
+      NSString *authenticationMethod = [protectionSpace authenticationMethod];
+      if ([authenticationMethod isEqual:NSURLAuthenticationMethodServerTrust]) {
+        // SSL.
+        //
+        // Background sessions seem to require an explicit check of the server trust object
+        // rather than default handling.
+        SecTrustRef serverTrust = challenge.protectionSpace.serverTrust;
+        if (serverTrust == NULL) {
+          // No server trust information is available.
+          handler(NSURLSessionAuthChallengePerformDefaultHandling, nil);
+        } else {
+          // Server trust information is available.
+          void (^callback)(SecTrustRef, BOOL) = ^(SecTrustRef trustRef, BOOL allow){
+            if (allow) {
+              NSURLCredential *trustCredential = [NSURLCredential credentialForTrust:trustRef];
+              handler(NSURLSessionAuthChallengeUseCredential, trustCredential);
+            } else {
+              GTMSESSION_LOG_DEBUG(@"Cancelling authentication challenge for %@", _request.URL);
+              handler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, nil);
+            }
+          };
+          if (_allowInvalidServerCertificates) {
+            callback(serverTrust, YES);
+          } else {
+            [[self class] evaluateServerTrust:serverTrust
+                                   forRequest:_request
+                            completionHandler:callback];
+          }
+        }
+        return;
+      }
+
+      NSURLCredential *credential = _credential;
+
+      if ([[challenge protectionSpace] isProxy] && _proxyCredential != nil) {
+        credential = _proxyCredential;
+      }
+
+      if (credential) {
+        handler(NSURLSessionAuthChallengeUseCredential, credential);
+      } else {
+        // The credential is still nil; tell the OS to use the default handling. This is needed
+        // for things that can come out of the keychain (proxies, client certificates, etc.).
+        //
+        // Note: Looking up a credential with NSURLCredentialStorage's
+        // defaultCredentialForProtectionSpace: is *not* the same invoking the handler with
+        // NSURLSessionAuthChallengePerformDefaultHandling. In the case of
+        // NSURLAuthenticationMethodClientCertificate, you can get nil back from
+        // NSURLCredentialStorage, while using this code path instead works.
+        handler(NSURLSessionAuthChallengePerformDefaultHandling, nil);
+      }
+
+    } else {
+      // We've failed auth 3 times.  The completion handler will be called with code
+      // NSURLErrorCancelled.
+      handler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, nil);
+    }
+  }  // @synchronized(self)
+}
+
+// Validate the certificate chain.
+//
+// This may become a public method if it appears to be useful to users.
++ (void)evaluateServerTrust:(SecTrustRef)serverTrust
+                 forRequest:(NSURLRequest *)request
+          completionHandler:(void (^)(SecTrustRef trustRef, BOOL allow))handler {
+  // Retain the trust object to avoid a SecTrustEvaluate() crash on iOS 7.
+  CFRetain(serverTrust);
+
+  // Evaluate the certificate chain.
+  //
+  // The delegate queue may be the main thread. Trust evaluation could cause some
+  // blocking network activity, so we must evaluate async, as documented at
+  // https://developer.apple.com/library/ios/technotes/tn2232/
+  //
+  // We must also avoid multiple uses of the trust object, per docs:
+  // "It is not safe to call this function concurrently with any other function that uses
+  // the same trust management object, or to re-enter this function for the same trust
+  // management object."
+  //
+  // SecTrustEvaluateAsync both does sync execution of Evaluate and calls back on the
+  // queue passed to it, according to at sources in
+  // http://www.opensource.apple.com/source/libsecurity_keychain/libsecurity_keychain-55050.9/lib/SecTrust.cpp
+  // It would require a global serial queue to ensure the evaluate happens only on a
+  // single thread at a time, so we'll stick with using SecTrustEvaluate on a background
+  // thread.
+  dispatch_queue_t evaluateBackgroundQueue =
+    dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
+  dispatch_async(evaluateBackgroundQueue, ^{
+    // It looks like the implementation of SecTrustEvaluate() on Mac grabs a global lock,
+    // so it may be redundant for us to also lock, but it's easy to synchronize here
+    // anyway.
+    SecTrustResultType trustEval = kSecTrustResultInvalid;
+    BOOL shouldAllow;
+    OSStatus trustError;
+    @synchronized([GTMSessionFetcher class]) {
+      GTMSessionMonitorSynchronized([GTMSessionFetcher class]);
+
+      trustError = SecTrustEvaluate(serverTrust, &trustEval);
+    }
+    if (trustError != errSecSuccess) {
+      GTMSESSION_LOG_DEBUG(@"Error %d evaluating trust for %@",
+                           (int)trustError, request);
+      shouldAllow = NO;
+    } else {
+      // Having a trust level "unspecified" by the user is the usual result, described at
+      //   https://developer.apple.com/library/mac/qa/qa1360
+      if (trustEval == kSecTrustResultUnspecified
+          || trustEval == kSecTrustResultProceed) {
+        shouldAllow = YES;
+      } else {
+        shouldAllow = NO;
+        GTMSESSION_LOG_DEBUG(@"Challenge SecTrustResultType %u for %@, properties: %@",
+                             trustEval, request.URL.host,
+                             CFBridgingRelease(SecTrustCopyProperties(serverTrust)));
+      }
+    }
+    handler(serverTrust, shouldAllow);
+
+    CFRelease(serverTrust);
+  });
+}
+
+- (void)invokeOnCallbackQueueUnlessStopped:(void (^)(void))block {
+  [self invokeOnCallbackQueueAfterUserStopped:NO
+                                        block:block];
+}
+
+- (void)invokeOnCallbackQueueAfterUserStopped:(BOOL)afterStopped
+                                        block:(void (^)(void))block {
+  GTMSessionCheckSynchronized(self);
+
+  [self invokeOnCallbackUnsynchronizedQueueAfterUserStopped:afterStopped
+                                                      block:block];
+}
+
+- (void)invokeOnCallbackUnsynchronizedQueueAfterUserStopped:(BOOL)afterStopped
+                                                      block:(void (^)(void))block {
+  // testBlock simulation code may not be synchronizing when this is invoked.
+  [self invokeOnCallbackQueue:_callbackQueue
+             afterUserStopped:afterStopped
+                        block:block];
+}
+
+- (void)invokeOnCallbackQueue:(dispatch_queue_t)callbackQueue
+             afterUserStopped:(BOOL)afterStopped
+                        block:(void (^)(void))block {
+  if (callbackQueue) {
+    dispatch_group_async(_callbackGroup, callbackQueue, ^{
+        if (!afterStopped) {
+          NSDate *serviceStoppedAllDate = [_service stoppedAllFetchersDate];
+
+          @synchronized(self) {
+            GTMSessionMonitorSynchronized(self);
+
+            // Avoid a race between stopFetching and the callback.
+            if (_userStoppedFetching) {
+              return;
+            }
+
+            // Also avoid calling back if the service has stopped all fetchers
+            // since this one was created. The fetcher may have stopped before
+            // stopAllFetchers was invoked, so _userStoppedFetching wasn't set,
+            // but the app still won't expect the callback to fire after
+            // the service's stopAllFetchers was invoked.
+            if (serviceStoppedAllDate
+                && [_initialBeginFetchDate compare:serviceStoppedAllDate] != NSOrderedDescending) {
+              // stopAllFetchers was called after this fetcher began.
+              return;
+            }
+          }  // @synchronized(self)
+        }
+        block();
+    });
+  }
+}
+
+- (void)invokeFetchCallbacksOnCallbackQueueWithData:(GTM_NULLABLE NSData *)data
+                                              error:(GTM_NULLABLE NSError *)error {
+  // Callbacks will be released in the method stopFetchReleasingCallbacks:
+  GTMSessionFetcherCompletionHandler handler;
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    handler = _completionHandler;
+
+    if (handler) {
+      [self invokeOnCallbackQueueUnlessStopped:^{
+        handler(data, error);
+
+        // Post a notification, primarily to allow code to collect responses for
+        // testing.
+        //
+        // The observing code is not likely on the fetcher's callback
+        // queue, so this posts explicitly to the main queue.
+        NSMutableDictionary *userInfo = [NSMutableDictionary dictionary];
+        if (data) {
+          userInfo[kGTMSessionFetcherCompletionDataKey] = data;
+        }
+        if (error) {
+          userInfo[kGTMSessionFetcherCompletionErrorKey] = error;
+        }
+        [self postNotificationOnMainThreadWithName:kGTMSessionFetcherCompletionInvokedNotification
+                                          userInfo:userInfo
+                                      requireAsync:NO];
+      }];
+    }
+  }  // @synchronized(self)
+}
+
+- (void)postNotificationOnMainThreadWithName:(NSString *)noteName
+                                    userInfo:(GTM_NULLABLE NSDictionary *)userInfo
+                                requireAsync:(BOOL)requireAsync {
+  dispatch_block_t postBlock = ^{
+    [[NSNotificationCenter defaultCenter] postNotificationName:noteName
+                                                        object:self
+                                                      userInfo:userInfo];
+  };
+
+  if ([NSThread isMainThread] && !requireAsync) {
+    // Post synchronously for compatibility with older code using the fetcher.
+
+    // Avoid calling out to other code from inside a sync block to avoid risk
+    // of a deadlock or of recursive sync.
+    GTMSessionCheckNotSynchronized(self);
+
+    postBlock();
+  } else {
+    dispatch_async(dispatch_get_main_queue(), postBlock);
+  }
+}
+
+- (void)URLSession:(NSURLSession *)session
+              task:(NSURLSessionTask *)uploadTask
+ needNewBodyStream:(void (^)(NSInputStream * GTM_NULLABLE_TYPE bodyStream))completionHandler {
+  [self setSessionTask:uploadTask];
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSession:%@ task:%@ needNewBodyStream:",
+                           [self class], self, session, uploadTask);
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    GTMSessionFetcherBodyStreamProvider provider = _bodyStreamProvider;
+#if !STRIP_GTM_FETCH_LOGGING
+    if ([self respondsToSelector:@selector(loggedStreamProviderForStreamProvider:)]) {
+      provider = [self performSelector:@selector(loggedStreamProviderForStreamProvider:)
+                            withObject:provider];
+    }
+#endif
+    if (provider) {
+      [self invokeOnCallbackQueueUnlessStopped:^{
+          provider(completionHandler);
+      }];
+    } else {
+      GTMSESSION_ASSERT_DEBUG(NO, @"NSURLSession expects a stream provider");
+
+      completionHandler(nil);
+    }
+  }  // @synchronized(self)
+}
+
+- (void)URLSession:(NSURLSession *)session
+              task:(NSURLSessionTask *)task
+   didSendBodyData:(int64_t)bytesSent
+    totalBytesSent:(int64_t)totalBytesSent
+totalBytesExpectedToSend:(int64_t)totalBytesExpectedToSend {
+  [self setSessionTask:task];
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSession:%@ task:%@ didSendBodyData:%lld"
+                           @" totalBytesSent:%lld totalBytesExpectedToSend:%lld",
+                           [self class], self, session, task, bytesSent, totalBytesSent,
+                           totalBytesExpectedToSend);
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (!_sendProgressBlock) {
+      return;
+    }
+    // We won't hold on to send progress block; it's ok to not send it if the upload finishes.
+    [self invokeOnCallbackQueueUnlessStopped:^{
+      GTMSessionFetcherSendProgressBlock progressBlock;
+      @synchronized(self) {
+        GTMSessionMonitorSynchronized(self);
+
+        progressBlock = _sendProgressBlock;
+      }
+      if (progressBlock) {
+        progressBlock(bytesSent, totalBytesSent, totalBytesExpectedToSend);
+      }
+    }];
+  }  // @synchronized(self)
+}
+
+- (void)URLSession:(NSURLSession *)session
+          dataTask:(NSURLSessionDataTask *)dataTask
+    didReceiveData:(NSData *)data {
+  [self setSessionTask:dataTask];
+  NSUInteger bufferLength = data.length;
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSession:%@ dataTask:%@ didReceiveData:%p (%llu bytes)",
+                           [self class], self, session, dataTask, data,
+                           (unsigned long long)bufferLength);
+  if (bufferLength == 0) {
+    // Observed on completing an out-of-process upload.
+    return;
+  }
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    GTMSessionFetcherAccumulateDataBlock accumulateBlock = _accumulateDataBlock;
+    if (accumulateBlock) {
+      // Let the client accumulate the data.
+      _downloadedLength += bufferLength;
+      [self invokeOnCallbackQueueUnlessStopped:^{
+          accumulateBlock(data);
+      }];
+    } else if (!_userStoppedFetching) {
+      // Append to the mutable data buffer unless the fetch has been cancelled.
+
+      // Resumed upload tasks may not yet have a data buffer.
+      if (_downloadedData == nil) {
+        // Using NSClassFromString for iOS 6 compatibility.
+        GTMSESSION_ASSERT_DEBUG(
+            ![dataTask isKindOfClass:NSClassFromString(@"NSURLSessionDownloadTask")],
+            @"Resumed download tasks should not receive data bytes");
+        _downloadedData = [[NSMutableData alloc] init];
+      }
+
+      [_downloadedData appendData:data];
+      _downloadedLength = (int64_t)_downloadedData.length;
+
+      // We won't hold on to receivedProgressBlock here; it's ok to not send
+      // it if the transfer finishes.
+      if (_receivedProgressBlock) {
+        [self invokeOnCallbackQueueUnlessStopped:^{
+            GTMSessionFetcherReceivedProgressBlock progressBlock;
+            @synchronized(self) {
+              GTMSessionMonitorSynchronized(self);
+
+              progressBlock = _receivedProgressBlock;
+            }
+            if (progressBlock) {
+              progressBlock((int64_t)bufferLength, _downloadedLength);
+            }
+        }];
+      }
+    }
+  }  // @synchronized(self)
+}
+
+- (void)URLSession:(NSURLSession *)session
+          dataTask:(NSURLSessionDataTask *)dataTask
+ willCacheResponse:(NSCachedURLResponse *)proposedResponse
+ completionHandler:(void (^)(NSCachedURLResponse *cachedResponse))completionHandler {
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSession:%@ dataTask:%@ willCacheResponse:%@ %@",
+                           [self class], self, session, dataTask,
+                           proposedResponse, proposedResponse.response);
+  GTMSessionFetcherWillCacheURLResponseBlock callback;
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    callback = _willCacheURLResponseBlock;
+
+    if (callback) {
+      [self invokeOnCallbackQueueAfterUserStopped:YES
+                                            block:^{
+          callback(proposedResponse, completionHandler);
+      }];
+    }
+  }  // @synchronized(self)
+  if (!callback) {
+    completionHandler(proposedResponse);
+  }
+}
+
+
+- (void)URLSession:(NSURLSession *)session
+      downloadTask:(NSURLSessionDownloadTask *)downloadTask
+      didWriteData:(int64_t)bytesWritten
+ totalBytesWritten:(int64_t)totalBytesWritten
+totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite {
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSession:%@ downloadTask:%@ didWriteData:%lld"
+                           @" bytesWritten:%lld totalBytesExpectedToWrite:%lld",
+                           [self class], self, session, downloadTask, bytesWritten,
+                           totalBytesWritten, totalBytesExpectedToWrite);
+  [self setSessionTask:downloadTask];
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if ((totalBytesExpectedToWrite != NSURLSessionTransferSizeUnknown) &&
+        (totalBytesExpectedToWrite < totalBytesWritten)) {
+      // Have observed cases were bytesWritten == totalBytesExpectedToWrite,
+      // but totalBytesWritten > totalBytesExpectedToWrite, so setting to unkown in these cases.
+      totalBytesExpectedToWrite = NSURLSessionTransferSizeUnknown;
+    }
+    // We won't hold on to download progress block during the enqueue;
+    // it's ok to not send it if the upload finishes.
+
+    [self invokeOnCallbackQueueUnlessStopped:^{
+      GTMSessionFetcherDownloadProgressBlock progressBlock;
+      @synchronized(self) {
+        GTMSessionMonitorSynchronized(self);
+
+        progressBlock = _downloadProgressBlock;
+      }
+      if (progressBlock) {
+        progressBlock(bytesWritten, totalBytesWritten, totalBytesExpectedToWrite);
+      }
+    }];
+  }  // @synchronized(self)
+}
+
+- (void)URLSession:(NSURLSession *)session
+      downloadTask:(NSURLSessionDownloadTask *)downloadTask
+ didResumeAtOffset:(int64_t)fileOffset
+expectedTotalBytes:(int64_t)expectedTotalBytes {
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSession:%@ downloadTask:%@ didResumeAtOffset:%lld"
+                           @" expectedTotalBytes:%lld",
+                           [self class], self, session, downloadTask, fileOffset,
+                           expectedTotalBytes);
+  [self setSessionTask:downloadTask];
+}
+
+- (void)URLSession:(NSURLSession *)session
+      downloadTask:(NSURLSessionDownloadTask *)downloadTask
+didFinishDownloadingToURL:(NSURL *)downloadLocationURL {
+  // Download may have relaunched app, so update _sessionTask.
+  [self setSessionTask:downloadTask];
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSession:%@ downloadTask:%@ didFinishDownloadingToURL:%@",
+                           [self class], self, session, downloadTask, downloadLocationURL);
+  NSNumber *fileSizeNum;
+  [downloadLocationURL getResourceValue:&fileSizeNum
+                                 forKey:NSURLFileSizeKey
+                                  error:NULL];
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    NSURL *destinationURL = _destinationFileURL;
+
+    _downloadedLength = fileSizeNum.longLongValue;
+
+    // Overwrite any previous file at the destination URL.
+    NSFileManager *fileMgr = [NSFileManager defaultManager];
+    NSError *removeError;
+    if (![fileMgr removeItemAtURL:destinationURL error:&removeError]
+        && removeError.code != NSFileNoSuchFileError) {
+      GTMSESSION_LOG_DEBUG(@"Could not remove previous file at %@ due to %@",
+                           downloadLocationURL.path, removeError);
+    }
+
+    NSInteger statusCode = [self statusCodeUnsynchronized];
+    if (statusCode < 200 || statusCode > 399) {
+      // In OS X 10.11, the response body is written to a file even on a server
+      // status error.  For convenience of the fetcher client, we'll skip saving the
+      // downloaded body to the destination URL so that clients do not need to know
+      // to delete the file following fetch errors. A downside of this is that
+      // the server may have included error details in the response body, and
+      // abandoning the downloaded file here means that the details from the
+      // body are not available to the fetcher client.
+      GTMSESSION_LOG_DEBUG(@"Abandoning download due to status %zd, file %@",
+                           statusCode, downloadLocationURL.path);
+    } else {
+      NSError *moveError;
+      NSURL *destinationFolderURL = [destinationURL URLByDeletingLastPathComponent];
+      BOOL didMoveDownload = NO;
+      if ([fileMgr createDirectoryAtURL:destinationFolderURL
+            withIntermediateDirectories:YES
+                             attributes:nil
+                                  error:&moveError]) {
+        didMoveDownload = [fileMgr moveItemAtURL:downloadLocationURL
+                                           toURL:destinationURL
+                                           error:&moveError];
+      }
+      if (!didMoveDownload) {
+        _downloadFinishedError = moveError;
+      }
+      GTM_LOG_BACKGROUND_SESSION(@"%@ %p Moved download from \"%@\" to \"%@\"  %@",
+                                 [self class], self,
+                                 downloadLocationURL.path, destinationURL.path,
+                                 error ? error : @"");
+    }
+  }  // @synchronized(self)
+}
+
+/* Sent as the last message related to a specific task.  Error may be
+ * nil, which implies that no error occurred and this task is complete.
+ */
+- (void)URLSession:(NSURLSession *)session
+              task:(NSURLSessionTask *)task
+didCompleteWithError:(NSError *)error {
+  [self setSessionTask:task];
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSession:%@ task:%@ didCompleteWithError:%@",
+                           [self class], self, session, task, error);
+
+  NSInteger status = self.statusCode;
+  BOOL forceAssumeRetry = NO;
+  BOOL succeeded = NO;
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+#if !GTM_DISABLE_FETCHER_TEST_BLOCK
+    // The task is never resumed when a testBlock is used. When the session is destroyed,
+    // we should ignore the callback, since the testBlock support code itself invokes
+    // shouldRetryNowForStatus: and finishWithError:shouldRetry:
+    if (_isUsingTestBlock) return;
+#endif
+
+    if (error == nil) {
+      error = _downloadFinishedError;
+    }
+    succeeded = (error == nil && status >= 0 && status < 300);
+    if (succeeded) {
+      // Succeeded.
+      _bodyLength = task.countOfBytesSent;
+    }
+  }  // @synchronized(self)
+
+  if (succeeded) {
+    [self finishWithError:nil shouldRetry:NO];
+    return;
+  }
+  // For background redirects, no delegate method is called, so we cannot restore a stripped
+  // Authorization header, so if a 403 ("Forbidden") was generated due to a missing OAuth 2 header,
+  // set the current request's URL to the redirected URL, so we in effect restore the Authorization
+  // header.
+  if ((status == 403) && self.usingBackgroundSession) {
+    NSURL *redirectURL = self.response.URL;
+    NSURLRequest *request = self.request;
+    if (![request.URL isEqual:redirectURL]) {
+      NSString *authorizationHeader = [request.allHTTPHeaderFields objectForKey:@"Authorization"];
+      if (authorizationHeader != nil) {
+        NSMutableURLRequest *mutableRequest = [request mutableCopy];
+        mutableRequest.URL = redirectURL;
+        [self updateMutableRequest:mutableRequest];
+        // Avoid assuming the session is still valid.
+        self.session = nil;
+        forceAssumeRetry = YES;
+      }
+    }
+  }
+
+  // If invalidating the session was deferred in stopFetchReleasingCallbacks: then do it now.
+  NSURLSession *oldSession = self.sessionNeedingInvalidation;
+  if (oldSession) {
+    [self setSessionNeedingInvalidation:NULL];
+    [oldSession finishTasksAndInvalidate];
+  }
+
+  // Failed.
+  [self shouldRetryNowForStatus:status
+                          error:error
+               forceAssumeRetry:forceAssumeRetry
+                       response:^(BOOL shouldRetry) {
+    [self finishWithError:error shouldRetry:shouldRetry];
+  }];
+}
+
+#if TARGET_OS_IPHONE
+- (void)URLSessionDidFinishEventsForBackgroundURLSession:(NSURLSession *)session {
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSessionDidFinishEventsForBackgroundURLSession:%@",
+                           [self class], self, session);
+  [self removePersistedBackgroundSessionFromDefaults];
+
+  GTMSessionFetcherSystemCompletionHandler handler;
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    handler = self.systemCompletionHandler;
+    self.systemCompletionHandler = nil;
+  }  // @synchronized(self)
+  if (handler) {
+    GTM_LOG_BACKGROUND_SESSION(@"%@ %p Calling system completionHandler", [self class], self);
+    handler();
+
+    @synchronized(self) {
+      GTMSessionMonitorSynchronized(self);
+
+      NSURLSession *oldSession = _session;
+      _session = nil;
+      if (_shouldInvalidateSession) {
+        [oldSession finishTasksAndInvalidate];
+      }
+    }  // @synchronized(self)
+  }
+}
+#endif
+
+- (void)URLSession:(NSURLSession *)session didBecomeInvalidWithError:(GTM_NULLABLE NSError *)error {
+  // This may happen repeatedly for retries.  On authentication callbacks, the retry
+  // may begin before the prior session sends the didBecomeInvalid delegate message.
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSession:%@ didBecomeInvalidWithError:%@",
+                           [self class], self, session, error);
+  if (session == (NSURLSession *)self.session) {
+    GTM_LOG_SESSION_DELEGATE(@"  Unexpected retained invalid session: %@", session);
+    self.session = nil;
+  }
+}
+
+- (void)finishWithError:(GTM_NULLABLE NSError *)error shouldRetry:(BOOL)shouldRetry {
+  [self removePersistedBackgroundSessionFromDefaults];
+
+  BOOL shouldStopFetching = YES;
+  NSData *downloadedData = nil;
+#if !STRIP_GTM_FETCH_LOGGING
+  BOOL shouldDeferLogging = NO;
+#endif
+  BOOL shouldBeginRetryTimer = NO;
+  NSInteger status = [self statusCode];
+  NSURL *destinationURL = self.destinationFileURL;
+
+  BOOL fetchSucceeded = (error == nil && status >= 0 && status < 300);
+
+#if !STRIP_GTM_FETCH_LOGGING
+  if (!fetchSucceeded) {
+    if (!shouldDeferLogging && !self.hasLoggedError) {
+      [self logNowWithError:error];
+      self.hasLoggedError = YES;
+    }
+  }
+#endif  // !STRIP_GTM_FETCH_LOGGING
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+#if !STRIP_GTM_FETCH_LOGGING
+    shouldDeferLogging = _deferResponseBodyLogging;
+#endif
+    if (fetchSucceeded) {
+      // Success
+      if ((_downloadedData.length > 0) && (destinationURL != nil)) {
+        // Overwrite any previous file at the destination URL.
+        NSFileManager *fileMgr = [NSFileManager defaultManager];
+        [fileMgr removeItemAtURL:destinationURL
+                           error:NULL];
+        NSURL *destinationFolderURL = [destinationURL URLByDeletingLastPathComponent];
+        BOOL didMoveDownload = NO;
+        if ([fileMgr createDirectoryAtURL:destinationFolderURL
+              withIntermediateDirectories:YES
+                               attributes:nil
+                                    error:&error]) {
+          didMoveDownload = [_downloadedData writeToURL:destinationURL
+                                                options:NSDataWritingAtomic
+                                                  error:&error];
+        }
+        if (didMoveDownload) {
+          _downloadedData = nil;
+        } else {
+          _downloadFinishedError = error;
+        }
+      }
+      downloadedData = _downloadedData;
+    } else {
+      // Unsuccessful with error or status over 300. Retry or notify the delegate of failure
+      if (shouldRetry) {
+        // Retrying.
+        shouldBeginRetryTimer = YES;
+        shouldStopFetching = NO;
+      } else {
+        if (error == nil) {
+          // Create an error.
+          NSDictionary *userInfo = nil;
+          if (_downloadedData.length > 0) {
+            userInfo = @{ kGTMSessionFetcherStatusDataKey : _downloadedData };
+          }
+          error = [NSError errorWithDomain:kGTMSessionFetcherStatusDomain
+                                      code:status
+                                  userInfo:userInfo];
+        } else {
+          // If the error had resume data, and the client supplied a resume block, pass the
+          // data to the client.
+          void (^resumeBlock)(NSData *) = _resumeDataBlock;
+          _resumeDataBlock = nil;
+          if (resumeBlock) {
+            NSData *resumeData = [error.userInfo objectForKey:NSURLSessionDownloadTaskResumeData];
+            if (resumeData) {
+              [self invokeOnCallbackQueueAfterUserStopped:YES block:^{
+                  resumeBlock(resumeData);
+              }];
+            }
+          }
+        }
+        if (_downloadedData.length > 0) {
+          downloadedData = _downloadedData;
+        }
+        // If the error occurred after retries, report the number and duration of the
+        // retries. This provides a clue to a developer looking at the error description
+        // that the fetcher did retry before failing with this error.
+        if (_retryCount > 0) {
+          NSMutableDictionary *userInfoWithRetries =
+              [NSMutableDictionary dictionaryWithDictionary:(NSDictionary *)error.userInfo];
+          NSTimeInterval timeSinceInitialRequest = -[_initialRequestDate timeIntervalSinceNow];
+          [userInfoWithRetries setObject:@(timeSinceInitialRequest)
+                                  forKey:kGTMSessionFetcherElapsedIntervalWithRetriesKey];
+          [userInfoWithRetries setObject:@(_retryCount)
+                                  forKey:kGTMSessionFetcherNumberOfRetriesDoneKey];
+          error = [NSError errorWithDomain:(NSString *)error.domain
+                                      code:error.code
+                                  userInfo:userInfoWithRetries];
+        }
+      }
+    }
+  }  // @synchronized(self)
+
+  if (shouldBeginRetryTimer) {
+    [self beginRetryTimer];
+  }
+
+  // We want to send the stop notification before calling the delegate's
+  // callback selector, since the callback selector may release all of
+  // the fetcher properties that the client is using to track the fetches.
+  //
+  // We'll also stop now so that, to any observers watching the notifications,
+  // it doesn't look like our wait for a retry (which may be long,
+  // 30 seconds or more) is part of the network activity.
+  [self sendStopNotificationIfNeeded];
+
+  if (shouldStopFetching) {
+    [self invokeFetchCallbacksOnCallbackQueueWithData:downloadedData
+                                                error:error];
+    // The upload subclass doesn't want to release callbacks until upload chunks have completed.
+    BOOL shouldRelease = [self shouldReleaseCallbacksUponCompletion];
+    [self stopFetchReleasingCallbacks:shouldRelease];
+  }
+
+#if !STRIP_GTM_FETCH_LOGGING
+  // _hasLoggedError is only set by this method
+  if (!shouldDeferLogging && !_hasLoggedError) {
+    [self logNowWithError:error];
+  }
+#endif
+}
+
+- (BOOL)shouldReleaseCallbacksUponCompletion {
+  // A subclass can override this to keep callbacks around after the
+  // connection has finished successfully
+  return YES;
+}
+
+- (void)logNowWithError:(GTM_NULLABLE NSError *)error {
+  GTMSessionCheckNotSynchronized(self);
+
+  // If the logging category is available, then log the current request,
+  // response, data, and error
+  if ([self respondsToSelector:@selector(logFetchWithError:)]) {
+    [self performSelector:@selector(logFetchWithError:) withObject:error];
+  }
+}
+
+#pragma mark Retries
+
+- (BOOL)isRetryError:(NSError *)error {
+  struct RetryRecord {
+    __unsafe_unretained NSString *const domain;
+    NSInteger code;
+  };
+
+  struct RetryRecord retries[] = {
+    { kGTMSessionFetcherStatusDomain, 408 }, // request timeout
+    { kGTMSessionFetcherStatusDomain, 502 }, // failure gatewaying to another server
+    { kGTMSessionFetcherStatusDomain, 503 }, // service unavailable
+    { kGTMSessionFetcherStatusDomain, 504 }, // request timeout
+    { NSURLErrorDomain, NSURLErrorTimedOut },
+    { NSURLErrorDomain, NSURLErrorNetworkConnectionLost },
+    { nil, 0 }
+  };
+
+  // NSError's isEqual always returns false for equal but distinct instances
+  // of NSError, so we have to compare the domain and code values explicitly
+  NSString *domain = error.domain;
+  NSInteger code = error.code;
+  for (int idx = 0; retries[idx].domain != nil; idx++) {
+    if (code == retries[idx].code && [domain isEqual:retries[idx].domain]) {
+      return YES;
+    }
+  }
+  return NO;
+}
+
+// shouldRetryNowForStatus:error: responds with YES if the user has enabled retries
+// and the status or error is one that is suitable for retrying.  "Suitable"
+// means either the isRetryError:'s list contains the status or error, or the
+// user's retry block is present and returns YES when called, or the
+// authorizer may be able to fix.
+- (void)shouldRetryNowForStatus:(NSInteger)status
+                          error:(NSError *)error
+               forceAssumeRetry:(BOOL)forceAssumeRetry
+                       response:(GTMSessionFetcherRetryResponse)response {
+  // Determine if a refreshed authorizer may avoid an authorization error
+  BOOL willRetry = NO;
+
+  // We assume _authorizer is immutable after beginFetch, and _hasAttemptedAuthRefresh is modified
+  // only in this method, and this method is invoked on the serial delegate queue.
+  //
+  // We want to avoid calling the authorizer from inside a sync block.
+  BOOL isFirstAuthError = (_authorizer != nil
+                           && !_hasAttemptedAuthRefresh
+                           && status == GTMSessionFetcherStatusUnauthorized); // 401
+
+  BOOL hasPrimed = NO;
+  if (isFirstAuthError) {
+    if ([_authorizer respondsToSelector:@selector(primeForRefresh)]) {
+      hasPrimed = [_authorizer primeForRefresh];
+    }
+  }
+
+  BOOL shouldRetryForAuthRefresh = NO;
+  if (hasPrimed) {
+    shouldRetryForAuthRefresh = YES;
+    _hasAttemptedAuthRefresh = YES;
+    [self updateRequestValue:nil forHTTPHeaderField:@"Authorization"];
+  }
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    BOOL shouldDoRetry = [self isRetryEnabledUnsynchronized];
+    if (shouldDoRetry && ![self hasRetryAfterInterval]) {
+
+      // Determine if we're doing exponential backoff retries
+      shouldDoRetry = [self nextRetryIntervalUnsynchronized] < _maxRetryInterval;
+
+      if (shouldDoRetry) {
+        // If an explicit max retry interval was set, we expect repeated backoffs to take
+        // up to roughly twice that for repeated fast failures.  If the initial attempt is
+        // already more than 3 times the max retry interval, then failures have taken a long time
+        // (such as from network timeouts) so don't retry again to avoid the app becoming
+        // unexpectedly unresponsive.
+        if (_maxRetryInterval > 0) {
+          NSTimeInterval maxAllowedIntervalBeforeRetry = _maxRetryInterval * 3;
+          NSTimeInterval timeSinceInitialRequest = -[_initialRequestDate timeIntervalSinceNow];
+          if (timeSinceInitialRequest > maxAllowedIntervalBeforeRetry) {
+            shouldDoRetry = NO;
+          }
+        }
+      }
+    }
+    BOOL canRetry = shouldRetryForAuthRefresh || forceAssumeRetry || shouldDoRetry;
+    if (canRetry) {
+      NSDictionary *userInfo = nil;
+      if (_downloadedData.length > 0) {
+        userInfo = @{ kGTMSessionFetcherStatusDataKey : _downloadedData };
+      }
+      NSError *statusError = [NSError errorWithDomain:kGTMSessionFetcherStatusDomain
+                                                 code:status
+                                             userInfo:userInfo];
+      if (error == nil) {
+        error = statusError;
+      }
+      willRetry = shouldRetryForAuthRefresh ||
+                  forceAssumeRetry ||
+                  [self isRetryError:error] ||
+                  ((error != statusError) && [self isRetryError:statusError]);
+
+      // If the user has installed a retry callback, consult that.
+      GTMSessionFetcherRetryBlock retryBlock = _retryBlock;
+      if (retryBlock) {
+        [self invokeOnCallbackQueueUnlessStopped:^{
+            retryBlock(willRetry, error, response);
+        }];
+        return;
+      }
+    }
+  }  // @synchronized(self)
+  response(willRetry);
+}
+
+- (BOOL)hasRetryAfterInterval {
+  GTMSessionCheckSynchronized(self);
+
+  NSDictionary *responseHeaders = [self responseHeadersUnsynchronized];
+  NSString *retryAfterValue = [responseHeaders valueForKey:@"Retry-After"];
+  return (retryAfterValue != nil);
+}
+
+- (NSTimeInterval)retryAfterInterval {
+  GTMSessionCheckSynchronized(self);
+
+  NSDictionary *responseHeaders = [self responseHeadersUnsynchronized];
+  NSString *retryAfterValue = [responseHeaders valueForKey:@"Retry-After"];
+  if (retryAfterValue == nil) {
+    return 0;
+  }
+  // Retry-After formatted as HTTP-date | delta-seconds
+  // Reference: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
+  NSDateFormatter *rfc1123DateFormatter = [[NSDateFormatter alloc] init];
+  rfc1123DateFormatter.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"];
+  rfc1123DateFormatter.timeZone = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];
+  rfc1123DateFormatter.dateFormat = @"EEE',' dd MMM yyyy HH':'mm':'ss z";
+  NSDate *retryAfterDate = [rfc1123DateFormatter dateFromString:retryAfterValue];
+  NSTimeInterval retryAfterInterval = (retryAfterDate != nil) ?
+      retryAfterDate.timeIntervalSinceNow : retryAfterValue.intValue;
+  retryAfterInterval = MAX(0, retryAfterInterval);
+  return retryAfterInterval;
+}
+
+- (void)beginRetryTimer {
+  if (![NSThread isMainThread]) {
+    // Defer creating and starting the timer until we're on the main thread to ensure it has
+    // a run loop.
+    dispatch_group_async(_callbackGroup, dispatch_get_main_queue(), ^{
+        [self beginRetryTimer];
+    });
+    return;
+  }
+
+  [self destroyRetryTimer];
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    NSTimeInterval nextInterval = [self nextRetryIntervalUnsynchronized];
+    NSTimeInterval maxInterval = _maxRetryInterval;
+    NSTimeInterval newInterval = MIN(nextInterval, (maxInterval > 0 ? maxInterval : DBL_MAX));
+    NSTimeInterval newIntervalTolerance = (newInterval / 10) > 1.0 ?: 1.0;
+
+    _lastRetryInterval = newInterval;
+
+    _retryTimer = [NSTimer timerWithTimeInterval:newInterval
+                                          target:self
+                                        selector:@selector(retryTimerFired:)
+                                        userInfo:nil
+                                         repeats:NO];
+    _retryTimer.tolerance = newIntervalTolerance;
+    [[NSRunLoop mainRunLoop] addTimer:_retryTimer
+                              forMode:NSDefaultRunLoopMode];
+  }  // @synchronized(self)
+
+  [self postNotificationOnMainThreadWithName:kGTMSessionFetcherRetryDelayStartedNotification
+                                    userInfo:nil
+                                requireAsync:NO];
+}
+
+- (void)retryTimerFired:(NSTimer *)timer {
+  [self destroyRetryTimer];
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _retryCount++;
+  }  // @synchronized(self)
+
+  NSOperationQueue *queue = self.sessionDelegateQueue;
+  [queue addOperationWithBlock:^{
+    [self retryFetch];
+  }];
+}
+
+- (void)destroyRetryTimer {
+  BOOL shouldNotify = NO;
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_retryTimer) {
+      [_retryTimer invalidate];
+      _retryTimer = nil;
+      shouldNotify = YES;
+    }
+  }
+
+  if (shouldNotify) {
+    [self postNotificationOnMainThreadWithName:kGTMSessionFetcherRetryDelayStoppedNotification
+                                      userInfo:nil
+                                  requireAsync:NO];
+  }
+}
+
+- (NSUInteger)retryCount {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _retryCount;
+  }  // @synchronized(self)
+}
+
+- (NSTimeInterval)nextRetryInterval {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    NSTimeInterval interval = [self nextRetryIntervalUnsynchronized];
+    return interval;
+  }  // @synchronized(self)
+}
+
+- (NSTimeInterval)nextRetryIntervalUnsynchronized {
+  GTMSessionCheckSynchronized(self);
+
+  NSInteger statusCode = [self statusCodeUnsynchronized];
+  if ((statusCode == 503) && [self hasRetryAfterInterval]) {
+    NSTimeInterval secs = [self retryAfterInterval];
+    return secs;
+  }
+  // The next wait interval is the factor (2.0) times the last interval,
+  // but never less than the minimum interval.
+  NSTimeInterval secs = _lastRetryInterval * _retryFactor;
+  if (_maxRetryInterval > 0) {
+    secs = MIN(secs, _maxRetryInterval);
+  }
+  secs = MAX(secs, _minRetryInterval);
+
+  return secs;
+}
+
+- (NSTimer *)retryTimer {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _retryTimer;
+  }  // @synchronized(self)
+}
+
+- (BOOL)isRetryEnabled {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _isRetryEnabled;
+  }  // @synchronized(self)
+}
+
+- (BOOL)isRetryEnabledUnsynchronized {
+  GTMSessionCheckSynchronized(self);
+
+  return _isRetryEnabled;
+}
+
+- (void)setRetryEnabled:(BOOL)flag {
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (flag && !_isRetryEnabled) {
+      // We defer initializing these until the user calls setRetryEnabled
+      // to avoid using the random number generator if it's not needed.
+      // However, this means min and max intervals for this fetcher are reset
+      // as a side effect of calling setRetryEnabled.
+      //
+      // Make an initial retry interval random between 1.0 and 2.0 seconds
+      _minRetryInterval = InitialMinRetryInterval();
+      _maxRetryInterval = kUnsetMaxRetryInterval;
+      _retryFactor = 2.0;
+      _lastRetryInterval = 0.0;
+    }
+    _isRetryEnabled = flag;
+  }  // @synchronized(self)
+};
+
+- (NSTimeInterval)maxRetryInterval {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _maxRetryInterval;
+  }  // @synchronized(self)
+}
+
+- (void)setMaxRetryInterval:(NSTimeInterval)secs {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (secs > 0) {
+      _maxRetryInterval = secs;
+    } else {
+      _maxRetryInterval = kUnsetMaxRetryInterval;
+    }
+  }  // @synchronized(self)
+}
+
+- (double)minRetryInterval {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _minRetryInterval;
+  }  // @synchronized(self)
+}
+
+- (void)setMinRetryInterval:(NSTimeInterval)secs {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (secs > 0) {
+      _minRetryInterval = secs;
+    } else {
+      // Set min interval to a random value between 1.0 and 2.0 seconds
+      // so that if multiple clients start retrying at the same time, they'll
+      // repeat at different times and avoid overloading the server
+      _minRetryInterval = InitialMinRetryInterval();
+    }
+  }  // @synchronized(self)
+
+}
+
+#pragma mark iOS System Completion Handlers
+
+#if TARGET_OS_IPHONE
+static NSMutableDictionary *gSystemCompletionHandlers = nil;
+
+- (GTM_NULLABLE GTMSessionFetcherSystemCompletionHandler)systemCompletionHandler {
+  return [[self class] systemCompletionHandlerForSessionIdentifier:_sessionIdentifier];
+}
+
+- (void)setSystemCompletionHandler:(GTM_NULLABLE GTMSessionFetcherSystemCompletionHandler)systemCompletionHandler {
+  [[self class] setSystemCompletionHandler:systemCompletionHandler
+                      forSessionIdentifier:_sessionIdentifier];
+}
+
++ (void)setSystemCompletionHandler:(GTM_NULLABLE GTMSessionFetcherSystemCompletionHandler)systemCompletionHandler
+              forSessionIdentifier:(NSString *)sessionIdentifier {
+  if (!sessionIdentifier) {
+    NSLog(@"%s with nil identifier", __PRETTY_FUNCTION__);
+    return;
+  }
+
+  @synchronized([GTMSessionFetcher class]) {
+    if (gSystemCompletionHandlers == nil && systemCompletionHandler != nil) {
+      gSystemCompletionHandlers = [[NSMutableDictionary alloc] init];
+    }
+    // Use setValue: to remove the object if completionHandler is nil.
+    [gSystemCompletionHandlers setValue:systemCompletionHandler
+                                 forKey:sessionIdentifier];
+  }
+}
+
++ (GTM_NULLABLE GTMSessionFetcherSystemCompletionHandler)systemCompletionHandlerForSessionIdentifier:(NSString *)sessionIdentifier {
+  if (!sessionIdentifier) {
+    return nil;
+  }
+  @synchronized([GTMSessionFetcher class]) {
+    return [gSystemCompletionHandlers objectForKey:sessionIdentifier];
+  }
+}
+#endif  // TARGET_OS_IPHONE
+
+#pragma mark Getters and Setters
+
+@synthesize downloadResumeData = _downloadResumeData,
+            configuration = _configuration,
+            configurationBlock = _configurationBlock,
+            sessionTask = _sessionTask,
+            wasCreatedFromBackgroundSession = _wasCreatedFromBackgroundSession,
+            sessionUserInfo = _sessionUserInfo,
+            taskDescription = _taskDescription,
+            taskPriority = _taskPriority,
+            usingBackgroundSession = _usingBackgroundSession,
+            canShareSession = _canShareSession,
+            completionHandler = _completionHandler,
+            credential = _credential,
+            proxyCredential = _proxyCredential,
+            bodyData = _bodyData,
+            bodyLength = _bodyLength,
+            service = _service,
+            serviceHost = _serviceHost,
+            accumulateDataBlock = _accumulateDataBlock,
+            receivedProgressBlock = _receivedProgressBlock,
+            downloadProgressBlock = _downloadProgressBlock,
+            resumeDataBlock = _resumeDataBlock,
+            didReceiveResponseBlock = _didReceiveResponseBlock,
+            challengeBlock = _challengeBlock,
+            willRedirectBlock = _willRedirectBlock,
+            sendProgressBlock = _sendProgressBlock,
+            willCacheURLResponseBlock = _willCacheURLResponseBlock,
+            retryBlock = _retryBlock,
+            retryFactor = _retryFactor,
+            allowedInsecureSchemes = _allowedInsecureSchemes,
+            allowLocalhostRequest = _allowLocalhostRequest,
+            allowInvalidServerCertificates = _allowInvalidServerCertificates,
+            cookieStorage = _cookieStorage,
+            callbackQueue = _callbackQueue,
+            initialBeginFetchDate = _initialBeginFetchDate,
+            testBlock = _testBlock,
+            comment = _comment,
+            log = _log;
+
+#if !STRIP_GTM_FETCH_LOGGING
+@synthesize redirectedFromURL = _redirectedFromURL,
+            logRequestBody = _logRequestBody,
+            logResponseBody = _logResponseBody,
+            hasLoggedError = _hasLoggedError;
+#endif
+
+#if GTM_BACKGROUND_TASK_FETCHING
+@synthesize backgroundTaskIdentifier = _backgroundTaskIdentifier,
+            skipBackgroundTask = _skipBackgroundTask;
+#endif
+
+- (GTM_NULLABLE NSURLRequest *)request {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return [_request copy];
+  }  // @synchronized(self)
+}
+
+- (void)setRequest:(GTM_NULLABLE NSURLRequest *)request {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (![self isFetchingUnsynchronized]) {
+      _request = [request mutableCopy];
+    } else {
+      GTMSESSION_ASSERT_DEBUG(0, @"request may not be set after beginFetch has been invoked");
+    }
+  }  // @synchronized(self)
+}
+
+- (GTM_NULLABLE NSMutableURLRequest *)mutableRequestForTesting {
+  // Allow tests only to modify the request, useful during retries.
+  return _request;
+}
+
+- (GTM_NULLABLE NSMutableURLRequest *)mutableRequest {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    GTMSESSION_LOG_DEBUG(@"[GTMSessionFetcher mutableRequest] is deprecated; use -request or"
+                         @" -setRequestVaue:forHTTPHeaderField:");
+
+    return _request;
+  }  // @synchronized(self)
+}
+
+- (void)setMutableRequest:(GTM_NULLABLE NSMutableURLRequest *)request {
+  GTMSESSION_LOG_DEBUG(@"[GTMSessionFetcher setMutableRequest:] is deprecated; use -request or"
+                       @" -setRequestVaue:forHTTPHeaderField:");
+
+  GTMSESSION_ASSERT_DEBUG(![self isFetching],
+                          @"mutableRequest should not change after beginFetch has been invoked");
+  [self updateMutableRequest:request];
+}
+
+// Internal method for updating the request property such as on redirects.
+- (void)updateMutableRequest:(GTM_NULLABLE NSMutableURLRequest *)request {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _request = request;
+  }  // @synchronized(self)
+}
+
+// Set a header field value on the request. Header field value changes will not
+// affect a fetch after the fetch has begun.
+- (void)setRequestValue:(GTM_NULLABLE NSString *)value forHTTPHeaderField:(NSString *)field {
+  if (![self isFetching]) {
+    [self updateRequestValue:value forHTTPHeaderField:field];
+  } else {
+    GTMSESSION_ASSERT_DEBUG(0, @"request may not be set after beginFetch has been invoked");
+  }
+}
+
+// Internal method for updating request headers.
+- (void)updateRequestValue:(GTM_NULLABLE NSString *)value forHTTPHeaderField:(NSString *)field {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    [_request setValue:value forHTTPHeaderField:field];
+  }  // @synchronized(self)
+}
+
+- (void)setResponse:(GTM_NULLABLE NSURLResponse *)response {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _response = response;
+  }  // @synchronized(self)
+}
+
+- (int64_t)bodyLength {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_bodyLength == NSURLSessionTransferSizeUnknown) {
+      if (_bodyData) {
+        _bodyLength = (int64_t)_bodyData.length;
+      } else if (_bodyFileURL) {
+        NSNumber *fileSizeNum = nil;
+        NSError *fileSizeError = nil;
+        if ([_bodyFileURL getResourceValue:&fileSizeNum
+                                    forKey:NSURLFileSizeKey
+                                     error:&fileSizeError]) {
+          _bodyLength = [fileSizeNum longLongValue];
+        }
+      }
+    }
+    return _bodyLength;
+  }  // @synchronized(self)
+}
+
+- (BOOL)useUploadTask {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _useUploadTask;
+  }  // @synchronized(self)
+}
+
+- (void)setUseUploadTask:(BOOL)flag {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (flag != _useUploadTask) {
+      GTMSESSION_ASSERT_DEBUG(![self isFetchingUnsynchronized],
+                              @"useUploadTask should not change after beginFetch has been invoked");
+      _useUploadTask = flag;
+    }
+  }  // @synchronized(self)
+}
+
+- (GTM_NULLABLE NSURL *)bodyFileURL {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _bodyFileURL;
+  }  // @synchronized(self)
+}
+
+- (void)setBodyFileURL:(GTM_NULLABLE NSURL *)fileURL {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    // The comparison here is a trivial optimization and forgiveness for any client that
+    // repeatedly sets the property, so it just uses pointer comparison rather than isEqual:.
+    if (fileURL != _bodyFileURL) {
+      GTMSESSION_ASSERT_DEBUG(![self isFetchingUnsynchronized],
+                              @"fileURL should not change after beginFetch has been invoked");
+
+      _bodyFileURL = fileURL;
+    }
+  }  // @synchronized(self)
+}
+
+- (GTM_NULLABLE GTMSessionFetcherBodyStreamProvider)bodyStreamProvider {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _bodyStreamProvider;
+  }  // @synchronized(self)
+}
+
+- (void)setBodyStreamProvider:(GTM_NULLABLE GTMSessionFetcherBodyStreamProvider)block {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    GTMSESSION_ASSERT_DEBUG(![self isFetchingUnsynchronized],
+                            @"stream provider should not change after beginFetch has been invoked");
+
+    _bodyStreamProvider = [block copy];
+  }  // @synchronized(self)
+}
+
+- (GTM_NULLABLE id<GTMFetcherAuthorizationProtocol>)authorizer {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _authorizer;
+  }  // @synchronized(self)
+}
+
+- (void)setAuthorizer:(GTM_NULLABLE id<GTMFetcherAuthorizationProtocol>)authorizer {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (authorizer != _authorizer) {
+      if ([self isFetchingUnsynchronized]) {
+        GTMSESSION_ASSERT_DEBUG(0, @"authorizer should not change after beginFetch has been invoked");
+      } else {
+        _authorizer = authorizer;
+      }
+    }
+  }  // @synchronized(self)
+}
+
+- (GTM_NULLABLE NSData *)downloadedData {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _downloadedData;
+  }  // @synchronized(self)
+}
+
+- (void)setDownloadedData:(GTM_NULLABLE NSData *)data {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _downloadedData = [data mutableCopy];
+  }  // @synchronized(self)
+}
+
+- (int64_t)downloadedLength {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _downloadedLength;
+  }  // @synchronized(self)
+}
+
+- (void)setDownloadedLength:(int64_t)length {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _downloadedLength = length;
+  }  // @synchronized(self)
+}
+
+- (dispatch_queue_t GTM_NONNULL_TYPE)callbackQueue {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _callbackQueue;
+  }  // @synchronized(self)
+}
+
+- (void)setCallbackQueue:(dispatch_queue_t GTM_NULLABLE_TYPE)queue {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _callbackQueue = queue ?: dispatch_get_main_queue();
+  }  // @synchronized(self)
+}
+
+- (GTM_NULLABLE NSURLSession *)session {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _session;
+  }  // @synchronized(self)
+}
+
+- (NSInteger)servicePriority {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _servicePriority;
+  }  // @synchronized(self)
+}
+
+- (void)setServicePriority:(NSInteger)value {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (value != _servicePriority) {
+      GTMSESSION_ASSERT_DEBUG(![self isFetchingUnsynchronized],
+        @"servicePriority should not change after beginFetch has been invoked");
+
+      _servicePriority = value;
+    }
+  }  // @synchronized(self)
+}
+
+
+- (void)setSession:(GTM_NULLABLE NSURLSession *)session {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _session = session;
+  }  // @synchronized(self)
+}
+
+- (BOOL)canShareSession {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _canShareSession;
+  }  // @synchronized(self)
+}
+
+- (void)setCanShareSession:(BOOL)flag {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _canShareSession = flag;
+  }  // @synchronized(self)
+}
+
+- (BOOL)useBackgroundSession {
+  // This reflects if the user requested a background session, not necessarily
+  // if one was created. That is tracked with _usingBackgroundSession.
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _userRequestedBackgroundSession;
+  }  // @synchronized(self)
+}
+
+- (void)setUseBackgroundSession:(BOOL)flag {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (flag != _userRequestedBackgroundSession) {
+      GTMSESSION_ASSERT_DEBUG(![self isFetchingUnsynchronized],
+          @"useBackgroundSession should not change after beginFetch has been invoked");
+
+      _userRequestedBackgroundSession = flag;
+    }
+  }  // @synchronized(self)
+}
+
+- (BOOL)isUsingBackgroundSession {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _usingBackgroundSession;
+  }  // @synchronized(self)
+}
+
+- (void)setUsingBackgroundSession:(BOOL)flag {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _usingBackgroundSession = flag;
+  }  // @synchronized(self)
+}
+
+- (GTM_NULLABLE NSURLSession *)sessionNeedingInvalidation {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _sessionNeedingInvalidation;
+  }  // @synchronized(self)
+}
+
+- (void)setSessionNeedingInvalidation:(GTM_NULLABLE NSURLSession *)session {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _sessionNeedingInvalidation = session;
+  }  // @synchronized(self)
+}
+
+- (NSOperationQueue * GTM_NONNULL_TYPE)sessionDelegateQueue {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _delegateQueue;
+  }  // @synchronized(self)
+}
+
+- (void)setSessionDelegateQueue:(NSOperationQueue * GTM_NULLABLE_TYPE)queue {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (queue != _delegateQueue) {
+      if ([self isFetchingUnsynchronized]) {
+        GTMSESSION_ASSERT_DEBUG(0, @"sessionDelegateQueue should not change after fetch begins");
+      } else {
+        _delegateQueue = queue ?: [NSOperationQueue mainQueue];
+      }
+    }
+  }  // @synchronized(self)
+}
+
+- (BOOL)userStoppedFetching {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _userStoppedFetching;
+  }  // @synchronized(self)
+}
+
+- (GTM_NULLABLE id)userData {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _userData;
+  }  // @synchronized(self)
+}
+
+- (void)setUserData:(GTM_NULLABLE id)theObj {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _userData = theObj;
+  }  // @synchronized(self)
+}
+
+- (GTM_NULLABLE NSURL *)destinationFileURL {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _destinationFileURL;
+  }  // @synchronized(self)
+}
+
+- (void)setDestinationFileURL:(GTM_NULLABLE NSURL *)destinationFileURL {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (((_destinationFileURL == nil) && (destinationFileURL == nil)) ||
+        [_destinationFileURL isEqual:destinationFileURL]) {
+      return;
+    }
+    if (_sessionIdentifier) {
+      // This is something we don't expect to happen in production.
+      // However if it ever happen, leave a system log.
+      NSLog(@"%@: Destination File URL changed from (%@) to (%@) after session identifier has "
+            @"been created.",
+            [self class], _destinationFileURL, destinationFileURL);
+#if DEBUG
+      // On both the simulator and devices, the path can change to the download file, but the name
+      // shouldn't change. Technically, this isn't supported in the fetcher, but the change of
+      // URL is expected to happen only across development runs through Xcode.
+      NSString *oldFilename = [_destinationFileURL lastPathComponent];
+      NSString *newFilename = [destinationFileURL lastPathComponent];
+      #pragma unused(oldFilename)
+      #pragma unused(newFilename)
+      GTMSESSION_ASSERT_DEBUG([oldFilename isEqualToString:newFilename],
+          @"Destination File URL cannot be changed after session identifier has been created");
+#endif
+    }
+    _destinationFileURL = destinationFileURL;
+  }  // @synchronized(self)
+}
+
+- (void)setProperties:(GTM_NULLABLE NSDictionary *)dict {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _properties = [dict mutableCopy];
+  }  // @synchronized(self)
+}
+
+- (GTM_NULLABLE NSDictionary *)properties {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _properties;
+  }  // @synchronized(self)
+}
+
+- (void)setProperty:(GTM_NULLABLE id)obj forKey:(NSString *)key {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_properties == nil && obj != nil) {
+      _properties = [[NSMutableDictionary alloc] init];
+    }
+    [_properties setValue:obj forKey:key];
+  }  // @synchronized(self)
+}
+
+- (GTM_NULLABLE id)propertyForKey:(NSString *)key {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return [_properties objectForKey:key];
+  }  // @synchronized(self)
+}
+
+- (void)addPropertiesFromDictionary:(NSDictionary *)dict {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_properties == nil && dict != nil) {
+      [self setProperties:[dict mutableCopy]];
+    } else {
+      [_properties addEntriesFromDictionary:dict];
+    }
+  }  // @synchronized(self)
+}
+
+- (void)setCommentWithFormat:(id)format, ... {
+#if !STRIP_GTM_FETCH_LOGGING
+  NSString *result = format;
+  if (format) {
+    va_list argList;
+    va_start(argList, format);
+
+    result = [[NSString alloc] initWithFormat:format
+                                    arguments:argList];
+    va_end(argList);
+  }
+  [self setComment:result];
+#endif
+}
+
+#if !STRIP_GTM_FETCH_LOGGING
+- (NSData *)loggedStreamData {
+  return _loggedStreamData;
+}
+
+- (void)appendLoggedStreamData:dataToAdd {
+  if (!_loggedStreamData) {
+    _loggedStreamData = [NSMutableData data];
+  }
+  [_loggedStreamData appendData:dataToAdd];
+}
+
+- (void)clearLoggedStreamData {
+  _loggedStreamData = nil;
+}
+
+- (void)setDeferResponseBodyLogging:(BOOL)deferResponseBodyLogging {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (deferResponseBodyLogging != _deferResponseBodyLogging) {
+      _deferResponseBodyLogging = deferResponseBodyLogging;
+      if (!deferResponseBodyLogging && !self.hasLoggedError) {
+        [_delegateQueue addOperationWithBlock:^{
+          [self logNowWithError:nil];
+        }];
+      }
+    }
+  }  // @synchronized(self)
+}
+
+- (BOOL)deferResponseBodyLogging {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _deferResponseBodyLogging;
+  }  // @synchronized(self)
+}
+
+#else
++ (void)setLoggingEnabled:(BOOL)flag {
+}
+
++ (BOOL)isLoggingEnabled {
+  return NO;
+}
+#endif // STRIP_GTM_FETCH_LOGGING
+
+@end
+
+@implementation GTMSessionFetcher (BackwardsCompatibilityOnly)
+
+- (void)setCookieStorageMethod:(NSInteger)method {
+  // For backwards compatibility with the old fetcher, we'll support the old constants.
+  //
+  // Clients using the GTMSessionFetcher class should set the cookie storage explicitly
+  // themselves.
+  NSHTTPCookieStorage *storage = nil;
+  switch(method) {
+    case 0:  // kGTMHTTPFetcherCookieStorageMethodStatic
+             // nil storage will use [[self class] staticCookieStorage] when the fetch begins.
+      break;
+    case 1:  // kGTMHTTPFetcherCookieStorageMethodFetchHistory
+             // Do nothing; use whatever was set by the fetcher service.
+      return;
+    case 2:  // kGTMHTTPFetcherCookieStorageMethodSystemDefault
+      storage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
+      break;
+    case 3:  // kGTMHTTPFetcherCookieStorageMethodNone
+             // Create temporary storage for this fetcher only.
+      storage = [[GTMSessionCookieStorage alloc] init];
+      break;
+    default:
+      GTMSESSION_ASSERT_DEBUG(0, @"Invalid cookie storage method: %d", (int)method);
+  }
+  self.cookieStorage = storage;
+}
+
+@end
+
+@implementation GTMSessionCookieStorage {
+  NSMutableArray *_cookies;
+  NSHTTPCookieAcceptPolicy _policy;
+}
+
+- (id)init {
+  self = [super init];
+  if (self != nil) {
+    _cookies = [[NSMutableArray alloc] init];
+  }
+  return self;
+}
+
+- (GTM_NULLABLE NSArray *)cookies {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return [_cookies copy];
+  }  // @synchronized(self)
+}
+
+- (void)setCookie:(NSHTTPCookie *)cookie {
+  if (!cookie) return;
+  if (_policy == NSHTTPCookieAcceptPolicyNever) return;
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    [self internalSetCookie:cookie];
+  }  // @synchronized(self)
+}
+
+// Note: this should only be called from inside a @synchronized(self) block.
+- (void)internalSetCookie:(NSHTTPCookie *)newCookie {
+  GTMSessionCheckSynchronized(self);
+
+  if (_policy == NSHTTPCookieAcceptPolicyNever) return;
+
+  BOOL isValidCookie = (newCookie.name.length > 0
+                        && newCookie.domain.length > 0
+                        && newCookie.path.length > 0);
+  GTMSESSION_ASSERT_DEBUG(isValidCookie, @"invalid cookie: %@", newCookie);
+
+  if (isValidCookie) {
+    // Remove the cookie if it's currently in the array.
+    NSHTTPCookie *oldCookie = [self cookieMatchingCookie:newCookie];
+    if (oldCookie) {
+      [_cookies removeObjectIdenticalTo:oldCookie];
+    }
+
+    if (![[self class] hasCookieExpired:newCookie]) {
+      [_cookies addObject:newCookie];
+    }
+  }
+}
+
+// Add all cookies in the new cookie array to the storage,
+// replacing stored cookies as appropriate.
+//
+// Side effect: removes expired cookies from the storage array.
+- (void)setCookies:(GTM_NULLABLE NSArray *)newCookies {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    [self removeExpiredCookies];
+
+    for (NSHTTPCookie *newCookie in newCookies) {
+      [self internalSetCookie:newCookie];
+    }
+  }  // @synchronized(self)
+}
+
+- (void)setCookies:(NSArray *)cookies forURL:(GTM_NULLABLE NSURL *)URL mainDocumentURL:(GTM_NULLABLE NSURL *)mainDocumentURL {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_policy == NSHTTPCookieAcceptPolicyNever) {
+      return;
+    }
+
+    if (_policy == NSHTTPCookieAcceptPolicyOnlyFromMainDocumentDomain) {
+      NSString *mainHost = mainDocumentURL.host;
+      NSString *associatedHost = URL.host;
+      if (!mainHost || ![associatedHost hasSuffix:mainHost]) {
+        return;
+      }
+    }
+  }  // @synchronized(self)
+  [self setCookies:cookies];
+}
+
+- (void)deleteCookie:(NSHTTPCookie *)cookie {
+  if (!cookie) return;
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    NSHTTPCookie *foundCookie = [self cookieMatchingCookie:cookie];
+    if (foundCookie) {
+      [_cookies removeObjectIdenticalTo:foundCookie];
+    }
+  }  // @synchronized(self)
+}
+
+// Retrieve all cookies appropriate for the given URL, considering
+// domain, path, cookie name, expiration, security setting.
+// Side effect: removed expired cookies from the storage array.
+- (GTM_NULLABLE NSArray *)cookiesForURL:(NSURL *)theURL {
+  NSMutableArray *foundCookies = nil;
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    [self removeExpiredCookies];
+
+    // We'll prepend "." to the desired domain, since we want the
+    // actual domain "nytimes.com" to still match the cookie domain
+    // ".nytimes.com" when we check it below with hasSuffix.
+    NSString *host = theURL.host.lowercaseString;
+    NSString *path = theURL.path;
+    NSString *scheme = [theURL scheme];
+
+    NSString *requestingDomain = nil;
+    BOOL isLocalhostRetrieval = NO;
+
+    if (IsLocalhost(host)) {
+      isLocalhostRetrieval = YES;
+    } else {
+      if (host.length > 0) {
+        requestingDomain = [@"." stringByAppendingString:host];
+      }
+    }
+
+    for (NSHTTPCookie *storedCookie in _cookies) {
+      NSString *cookieDomain = storedCookie.domain.lowercaseString;
+      NSString *cookiePath = storedCookie.path;
+      BOOL cookieIsSecure = [storedCookie isSecure];
+
+      BOOL isDomainOK;
+
+      if (isLocalhostRetrieval) {
+        // Prior to 10.5.6, the domain stored into NSHTTPCookies for localhost
+        // is "localhost.local"
+        isDomainOK = (IsLocalhost(cookieDomain)
+                      || [cookieDomain isEqual:@"localhost.local"]);
+      } else {
+        // Ensure we're matching exact domain names. We prepended a dot to the
+        // requesting domain, so we can also prepend one here if needed before
+        // checking if the request contains the cookie domain.
+        if (![cookieDomain hasPrefix:@"."]) {
+          cookieDomain = [@"." stringByAppendingString:cookieDomain];
+        }
+        isDomainOK = [requestingDomain hasSuffix:cookieDomain];
+      }
+
+      BOOL isPathOK = [cookiePath isEqual:@"/"] || [path hasPrefix:cookiePath];
+      BOOL isSecureOK = (!cookieIsSecure
+                         || [scheme caseInsensitiveCompare:@"https"] == NSOrderedSame);
+
+      if (isDomainOK && isPathOK && isSecureOK) {
+        if (foundCookies == nil) {
+          foundCookies = [NSMutableArray array];
+        }
+        [foundCookies addObject:storedCookie];
+      }
+    }
+  }  // @synchronized(self)
+  return foundCookies;
+}
+
+// Override methods from the NSHTTPCookieStorage (NSURLSessionTaskAdditions) category.
+- (void)storeCookies:(NSArray *)cookies forTask:(NSURLSessionTask *)task {
+  NSURLRequest *currentRequest = task.currentRequest;
+  [self setCookies:cookies forURL:currentRequest.URL mainDocumentURL:nil];
+}
+
+- (void)getCookiesForTask:(NSURLSessionTask *)task
+        completionHandler:(void (^)(GTM_NSArrayOf(NSHTTPCookie *) *))completionHandler {
+  if (completionHandler) {
+    NSURLRequest *currentRequest = task.currentRequest;
+    NSURL *currentRequestURL = currentRequest.URL;
+    NSArray *cookies = [self cookiesForURL:currentRequestURL];
+    completionHandler(cookies);
+  }
+}
+
+// Return a cookie from the array with the same name, domain, and path as the
+// given cookie, or else return nil if none found.
+//
+// Both the cookie being tested and all cookies in the storage array should
+// be valid (non-nil name, domains, paths).
+//
+// Note: this should only be called from inside a @synchronized(self) block
+- (GTM_NULLABLE NSHTTPCookie *)cookieMatchingCookie:(NSHTTPCookie *)cookie {
+  GTMSessionCheckSynchronized(self);
+
+  NSString *name = cookie.name;
+  NSString *domain = cookie.domain;
+  NSString *path = cookie.path;
+
+  GTMSESSION_ASSERT_DEBUG(name && domain && path,
+                          @"Invalid stored cookie (name:%@ domain:%@ path:%@)", name, domain, path);
+
+  for (NSHTTPCookie *storedCookie in _cookies) {
+    if ([storedCookie.name isEqual:name]
+        && [storedCookie.domain isEqual:domain]
+        && [storedCookie.path isEqual:path]) {
+      return storedCookie;
+    }
+  }
+  return nil;
+}
+
+// Internal routine to remove any expired cookies from the array, excluding
+// cookies with nil expirations.
+//
+// Note: this should only be called from inside a @synchronized(self) block
+- (void)removeExpiredCookies {
+  GTMSessionCheckSynchronized(self);
+
+  // Count backwards since we're deleting items from the array
+  for (NSInteger idx = (NSInteger)_cookies.count - 1; idx >= 0; idx--) {
+    NSHTTPCookie *storedCookie = [_cookies objectAtIndex:(NSUInteger)idx];
+    if ([[self class] hasCookieExpired:storedCookie]) {
+      [_cookies removeObjectAtIndex:(NSUInteger)idx];
+    }
+  }
+}
+
++ (BOOL)hasCookieExpired:(NSHTTPCookie *)cookie {
+  NSDate *expiresDate = [cookie expiresDate];
+  if (expiresDate == nil) {
+    // Cookies seem to have a Expires property even when the expiresDate method returns nil.
+    id expiresVal = [[cookie properties] objectForKey:NSHTTPCookieExpires];
+    if ([expiresVal isKindOfClass:[NSDate class]]) {
+      expiresDate = expiresVal;
+    }
+  }
+  BOOL hasExpired = (expiresDate != nil && [expiresDate timeIntervalSinceNow] < 0);
+  return hasExpired;
+}
+
+- (void)removeAllCookies {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    [_cookies removeAllObjects];
+  }  // @synchronized(self)
+}
+
+- (NSHTTPCookieAcceptPolicy)cookieAcceptPolicy {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _policy;
+  }  // @synchronized(self)
+}
+
+- (void)setCookieAcceptPolicy:(NSHTTPCookieAcceptPolicy)cookieAcceptPolicy {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _policy = cookieAcceptPolicy;
+  }  // @synchronized(self)
+}
+
+@end
+
+void GTMSessionFetcherAssertValidSelector(id GTM_NULLABLE_TYPE obj, SEL GTM_NULLABLE_TYPE sel, ...) {
+  // Verify that the object's selector is implemented with the proper
+  // number and type of arguments
+#if DEBUG
+  va_list argList;
+  va_start(argList, sel);
+
+  if (obj && sel) {
+    // Check that the selector is implemented
+    if (![obj respondsToSelector:sel]) {
+      NSLog(@"\"%@\" selector \"%@\" is unimplemented or misnamed",
+                             NSStringFromClass([(id)obj class]),
+                             NSStringFromSelector((SEL)sel));
+      NSCAssert(0, @"callback selector unimplemented or misnamed");
+    } else {
+      const char *expectedArgType;
+      unsigned int argCount = 2; // skip self and _cmd
+      NSMethodSignature *sig = [obj methodSignatureForSelector:sel];
+
+      // Check that each expected argument is present and of the correct type
+      while ((expectedArgType = va_arg(argList, const char*)) != 0) {
+
+        if ([sig numberOfArguments] > argCount) {
+          const char *foundArgType = [sig getArgumentTypeAtIndex:argCount];
+
+          if (0 != strncmp(foundArgType, expectedArgType, strlen(expectedArgType))) {
+            NSLog(@"\"%@\" selector \"%@\" argument %d should be type %s",
+                  NSStringFromClass([(id)obj class]),
+                  NSStringFromSelector((SEL)sel), (argCount - 2), expectedArgType);
+            NSCAssert(0, @"callback selector argument type mistake");
+          }
+        }
+        argCount++;
+      }
+
+      // Check that the proper number of arguments are present in the selector
+      if (argCount != [sig numberOfArguments]) {
+        NSLog(@"\"%@\" selector \"%@\" should have %d arguments",
+              NSStringFromClass([(id)obj class]),
+              NSStringFromSelector((SEL)sel), (argCount - 2));
+        NSCAssert(0, @"callback selector arguments incorrect");
+      }
+    }
+  }
+
+  va_end(argList);
+#endif
+}
+
+NSString *GTMFetcherCleanedUserAgentString(NSString *str) {
+  // Reference http://www.w3.org/Protocols/rfc2616/rfc2616-sec2.html
+  // and http://www-archive.mozilla.org/build/user-agent-strings.html
+
+  if (str == nil) return @"";
+
+  NSMutableString *result = [NSMutableString stringWithString:str];
+
+  // Replace spaces and commas with underscores
+  [result replaceOccurrencesOfString:@" "
+                          withString:@"_"
+                             options:0
+                               range:NSMakeRange(0, result.length)];
+  [result replaceOccurrencesOfString:@","
+                          withString:@"_"
+                             options:0
+                               range:NSMakeRange(0, result.length)];
+
+  // Delete http token separators and remaining whitespace
+  static NSCharacterSet *charsToDelete = nil;
+  if (charsToDelete == nil) {
+    // Make a set of unwanted characters
+    NSString *const kSeparators = @"()<>@;:\\\"/[]?={}";
+
+    NSMutableCharacterSet *mutableChars =
+        [[NSCharacterSet whitespaceAndNewlineCharacterSet] mutableCopy];
+    [mutableChars addCharactersInString:kSeparators];
+    charsToDelete = [mutableChars copy]; // hang on to an immutable copy
+  }
+
+  while (1) {
+    NSRange separatorRange = [result rangeOfCharacterFromSet:charsToDelete];
+    if (separatorRange.location == NSNotFound) break;
+
+    [result deleteCharactersInRange:separatorRange];
+  };
+
+  return result;
+}
+
+NSString *GTMFetcherSystemVersionString(void) {
+  static NSString *sSavedSystemString;
+
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+#if TARGET_OS_MAC && !TARGET_OS_IPHONE
+    // Mac build
+    NSProcessInfo *procInfo = [NSProcessInfo processInfo];
+#if !defined(MAC_OS_X_VERSION_10_10)
+    BOOL hasOperatingSystemVersion = NO;
+#elif MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10
+    BOOL hasOperatingSystemVersion =
+        [procInfo respondsToSelector:@selector(operatingSystemVersion)];
+#else
+    BOOL hasOperatingSystemVersion = YES;
+#endif
+    NSString *versString;
+    if (hasOperatingSystemVersion) {
+#if defined(MAC_OS_X_VERSION_10_10)
+      // A reference to NSOperatingSystemVersion requires the 10.10 SDK.
+      NSOperatingSystemVersion version = procInfo.operatingSystemVersion;
+      versString = [NSString stringWithFormat:@"%zd.%zd.%zd",
+                    version.majorVersion, version.minorVersion, version.patchVersion];
+#else
+#pragma unused(procInfo)
+#endif
+    } else {
+      // With Gestalt inexplicably deprecated in 10.8, we're reduced to reading
+      // the system plist file.
+      NSString *const kPath = @"/System/Library/CoreServices/SystemVersion.plist";
+      NSDictionary *plist = [NSDictionary dictionaryWithContentsOfFile:kPath];
+      versString = [plist objectForKey:@"ProductVersion"];
+      if (versString.length == 0) {
+        versString = @"10.?.?";
+      }
+    }
+
+    sSavedSystemString = [[NSString alloc] initWithFormat:@"MacOSX/%@", versString];
+#elif TARGET_OS_IPHONE
+    // Compiling against the iPhone SDK
+    // Avoid the slowness of calling currentDevice repeatedly on the iPhone
+    UIDevice* currentDevice = [UIDevice currentDevice];
+
+    NSString *rawModel = [currentDevice model];
+    NSString *model = GTMFetcherCleanedUserAgentString(rawModel);
+
+    NSString *systemVersion = [currentDevice systemVersion];
+
+#if TARGET_IPHONE_SIMULATOR
+    NSString *hardwareModel = @"sim";
+#else
+    NSString *hardwareModel;
+    struct utsname unameRecord;
+    if (uname(&unameRecord) == 0) {
+      NSString *machineName = [NSString stringWithCString:unameRecord.machine
+                                                 encoding:NSUTF8StringEncoding];
+      hardwareModel = GTMFetcherCleanedUserAgentString(machineName);
+    } else {
+      hardwareModel = @"unk";
+    }
+#endif
+
+    sSavedSystemString = [[NSString alloc] initWithFormat:@"%@/%@ hw/%@",
+                          model, systemVersion, hardwareModel];
+    // Example:  iPod_Touch/2.2 hw/iPod1_1
+#elif defined(_SYS_UTSNAME_H)
+    // Foundation-only build
+    struct utsname unameRecord;
+    uname(&unameRecord);
+
+    sSavedSystemString = [NSString stringWithFormat:@"%s/%s",
+                          unameRecord.sysname, unameRecord.release]; // "Darwin/8.11.1"
+#endif
+  });
+  return sSavedSystemString;
+}
+
+NSString *GTMFetcherStandardUserAgentString(NSBundle * GTM_NULLABLE_TYPE bundle) {
+  NSString *result = [NSString stringWithFormat:@"%@ %@",
+                      GTMFetcherApplicationIdentifier(bundle),
+                      GTMFetcherSystemVersionString()];
+  return result;
+}
+
+NSString *GTMFetcherApplicationIdentifier(NSBundle * GTM_NULLABLE_TYPE bundle) {
+  @synchronized([GTMSessionFetcher class]) {
+    static NSMutableDictionary *sAppIDMap = nil;
+
+    // If there's a bundle ID, use that; otherwise, use the process name
+    if (bundle == nil) {
+      bundle = [NSBundle mainBundle];
+    }
+    NSString *bundleID = [bundle bundleIdentifier];
+    if (bundleID == nil) {
+      bundleID = @"";
+    }
+
+    NSString *identifier = [sAppIDMap objectForKey:bundleID];
+    if (identifier) return identifier;
+
+    // Apps may add a string to the info.plist to uniquely identify different builds.
+    identifier = [bundle objectForInfoDictionaryKey:@"GTMUserAgentID"];
+    if (identifier.length == 0) {
+      if (bundleID.length > 0) {
+        identifier = bundleID;
+      } else {
+        // Fall back on the procname, prefixed by "proc" to flag that it's
+        // autogenerated and perhaps unreliable
+        NSString *procName = [[NSProcessInfo processInfo] processName];
+        identifier = [NSString stringWithFormat:@"proc_%@", procName];
+      }
+    }
+
+    // Clean up whitespace and special characters
+    identifier = GTMFetcherCleanedUserAgentString(identifier);
+
+    // If there's a version number, append that
+    NSString *version = [bundle objectForInfoDictionaryKey:@"CFBundleShortVersionString"];
+    if (version.length == 0) {
+      version = [bundle objectForInfoDictionaryKey:@"CFBundleVersion"];
+    }
+
+    // Clean up whitespace and special characters
+    version = GTMFetcherCleanedUserAgentString(version);
+
+    // Glue the two together (cleanup done above or else cleanup would strip the
+    // slash)
+    if (version.length > 0) {
+      identifier = [identifier stringByAppendingFormat:@"/%@", version];
+    }
+
+    if (sAppIDMap == nil) {
+      sAppIDMap = [[NSMutableDictionary alloc] init];
+    }
+    [sAppIDMap setObject:identifier forKey:bundleID];
+    return identifier;
+  }
+}
+
+#if DEBUG
+@implementation GTMSessionSyncMonitorInternal {
+  NSValue *_objectKey;        // The synchronize target object.
+  const char *_functionName;  // The function containing the monitored sync block.
+}
+
+- (instancetype)initWithSynchronizationObject:(id)object
+                               allowRecursive:(BOOL)allowRecursive
+                                 functionName:(const char *)functionName {
+  self = [super init];
+  if (self) {
+    Class threadKey = [GTMSessionSyncMonitorInternal class];
+    _objectKey = [NSValue valueWithNonretainedObject:object];
+    _functionName = functionName;
+
+    NSMutableDictionary *threadDict = [NSThread currentThread].threadDictionary;
+    NSMutableDictionary *counters = threadDict[threadKey];
+    if (counters == nil) {
+      counters = [NSMutableDictionary dictionary];
+      threadDict[(id)threadKey] = counters;
+    }
+    NSCountedSet *functionNamesCounter = counters[_objectKey];
+    NSUInteger numberOfSyncingFunctions = functionNamesCounter.count;
+
+    if (!allowRecursive) {
+      BOOL isTopLevelSyncScope = (numberOfSyncingFunctions == 0);
+      NSArray *stack = [NSThread callStackSymbols];
+      GTMSESSION_ASSERT_DEBUG(isTopLevelSyncScope,
+                              @"*** Recursive sync on %@ at %s; previous sync at %@\n%@",
+                              [object class], functionName, functionNamesCounter.allObjects,
+                              [stack subarrayWithRange:NSMakeRange(1, stack.count - 1)]);
+    }
+
+    if (!functionNamesCounter) {
+      functionNamesCounter = [NSCountedSet set];
+      counters[_objectKey] = functionNamesCounter;
+    }
+    [functionNamesCounter addObject:@(functionName)];
+  }
+  return self;
+}
+
+- (void)dealloc {
+  Class threadKey = [GTMSessionSyncMonitorInternal class];
+
+  NSMutableDictionary *threadDict = [NSThread currentThread].threadDictionary;
+  NSMutableDictionary *counters = threadDict[threadKey];
+  NSCountedSet *functionNamesCounter = counters[_objectKey];
+  NSString *functionNameStr = @(_functionName);
+  NSUInteger numberOfSyncsByThisFunction = [functionNamesCounter countForObject:functionNameStr];
+  NSArray *stack = [NSThread callStackSymbols];
+  GTMSESSION_ASSERT_DEBUG(numberOfSyncsByThisFunction > 0, @"Sync not found on %@ at %s\n%@",
+                          [_objectKey.nonretainedObjectValue class], _functionName,
+                          [stack subarrayWithRange:NSMakeRange(1, stack.count - 1)]);
+  [functionNamesCounter removeObject:functionNameStr];
+  if (functionNamesCounter.count == 0) {
+    [counters removeObjectForKey:_objectKey];
+  }
+}
+
++ (NSArray *)functionsHoldingSynchronizationOnObject:(id)object {
+  Class threadKey = [GTMSessionSyncMonitorInternal class];
+  NSValue *localObjectKey = [NSValue valueWithNonretainedObject:object];
+
+  NSMutableDictionary *threadDict = [NSThread currentThread].threadDictionary;
+  NSMutableDictionary *counters = threadDict[threadKey];
+  NSCountedSet *functionNamesCounter = counters[localObjectKey];
+  return functionNamesCounter.count > 0 ? functionNamesCounter.allObjects : nil;
+}
+@end
+#endif  // DEBUG
+GTM_ASSUME_NONNULL_END
diff --git a/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcherLogging.h b/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcherLogging.h
new file mode 100644
index 0000000..bc0a65c
--- /dev/null
+++ b/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcherLogging.h
@@ -0,0 +1,107 @@
+/* Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "GTMSessionFetcher.h"
+
+// GTM HTTP Logging
+//
+// All traffic using GTMSessionFetcher can be easily logged.  Call
+//
+//   [GTMSessionFetcher setLoggingEnabled:YES];
+//
+// to begin generating log files.
+//
+// Log files are put into a folder on the desktop called "GTMHTTPDebugLogs"
+// unless another directory is specified with +setLoggingDirectory.
+//
+// In the iPhone simulator, the default logs location is the user's home
+// directory in ~/Library/Application Support.  On the iPhone device, the
+// default logs location is the application's documents directory on the device.
+//
+// Tip: use the Finder's "Sort By Date" to find the most recent logs.
+//
+// Each run of an application gets a separate set of log files.  An html
+// file is generated to simplify browsing the run's http transactions.
+// The html file includes javascript links for inline viewing of uploaded
+// and downloaded data.
+//
+// A symlink is created in the logs folder to simplify finding the html file
+// for the latest run of the application; the symlink is called
+//
+//   AppName_http_log_newest.html
+//
+// For better viewing of XML logs, use Camino or Firefox rather than Safari.
+//
+// Each fetcher may be given a comment to be inserted as a label in the logs,
+// such as
+//   [fetcher setCommentWithFormat:@"retrieve item %@", itemName];
+//
+// Projects may define STRIP_GTM_FETCH_LOGGING to remove logging code.
+
+#if !STRIP_GTM_FETCH_LOGGING
+
+@interface GTMSessionFetcher (GTMSessionFetcherLogging)
+
+// Note: the default logs directory is ~/Desktop/GTMHTTPDebugLogs; it will be
+// created as needed.  If a custom directory is set, the directory should
+// already exist.
++ (void)setLoggingDirectory:(NSString *)path;
++ (NSString *)loggingDirectory;
+
+// client apps can turn logging on and off
++ (void)setLoggingEnabled:(BOOL)isLoggingEnabled;
++ (BOOL)isLoggingEnabled;
+
+// client apps can turn off logging to a file if they want to only check
+// the fetcher's log property
++ (void)setLoggingToFileEnabled:(BOOL)isLoggingToFileEnabled;
++ (BOOL)isLoggingToFileEnabled;
+
+// client apps can optionally specify process name and date string used in
+// log file names
++ (void)setLoggingProcessName:(NSString *)processName;
++ (NSString *)loggingProcessName;
+
++ (void)setLoggingDateStamp:(NSString *)dateStamp;
++ (NSString *)loggingDateStamp;
+
+// client apps can specify the directory for the log for this specific run,
+// typically to match the directory used by another fetcher class, like:
+//
+//   [GTMSessionFetcher setLogDirectoryForCurrentRun:[GTMHTTPFetcher logDirectoryForCurrentRun]];
+//
+// Setting this overrides the logging directory, process name, and date stamp when writing
+// the log file.
++ (void)setLogDirectoryForCurrentRun:(NSString *)logDirectoryForCurrentRun;
++ (NSString *)logDirectoryForCurrentRun;
+
+// Prunes old log directories that have not been modified since the provided date.
+// This will not delete the current run's log directory.
++ (void)deleteLogDirectoriesOlderThanDate:(NSDate *)date;
+
+// internal; called by fetcher
+- (void)logFetchWithError:(NSError *)error;
+- (NSInputStream *)loggedInputStreamForInputStream:(NSInputStream *)inputStream;
+- (GTMSessionFetcherBodyStreamProvider)loggedStreamProviderForStreamProvider:
+    (GTMSessionFetcherBodyStreamProvider)streamProvider;
+
+// internal; accessors useful for viewing logs
++ (NSString *)processNameLogPrefix;
++ (NSString *)symlinkNameSuffix;
++ (NSString *)htmlFileName;
+
+@end
+
+#endif  // !STRIP_GTM_FETCH_LOGGING
diff --git a/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcherLogging.m b/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcherLogging.m
new file mode 100644
index 0000000..19a91eb
--- /dev/null
+++ b/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcherLogging.m
@@ -0,0 +1,976 @@
+/* Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+#include <sys/stat.h>
+#include <unistd.h>
+
+#import "GTMSessionFetcherLogging.h"
+
+#ifndef STRIP_GTM_FETCH_LOGGING
+  #error GTMSessionFetcher headers should have defaulted this if it wasn't already defined.
+#endif
+
+#if !STRIP_GTM_FETCH_LOGGING
+
+// Sensitive credential strings are replaced in logs with _snip_
+//
+// Apps that must see the contents of sensitive tokens can set this to 1
+#ifndef SKIP_GTM_FETCH_LOGGING_SNIPPING
+#define SKIP_GTM_FETCH_LOGGING_SNIPPING 0
+#endif
+
+// If GTMReadMonitorInputStream is available, it can be used for
+// capturing uploaded streams of data
+//
+// We locally declare methods of GTMReadMonitorInputStream so we
+// do not need to import the header, as some projects may not have it available
+#if !GTMSESSION_BUILD_COMBINED_SOURCES
+@interface GTMReadMonitorInputStream : NSInputStream
+
++ (instancetype)inputStreamWithStream:(NSInputStream *)input;
+
+@property (assign) id readDelegate;
+@property (assign) SEL readSelector;
+
+@end
+#else
+@class GTMReadMonitorInputStream;
+#endif  // !GTMSESSION_BUILD_COMBINED_SOURCES
+
+@interface GTMSessionFetcher (GTMHTTPFetcherLoggingUtilities)
+
++ (NSString *)headersStringForDictionary:(NSDictionary *)dict;
++ (NSString *)snipSubstringOfString:(NSString *)originalStr
+                 betweenStartString:(NSString *)startStr
+                          endString:(NSString *)endStr;
+- (void)inputStream:(GTMReadMonitorInputStream *)stream
+     readIntoBuffer:(void *)buffer
+             length:(int64_t)length;
+
+@end
+
+@implementation GTMSessionFetcher (GTMSessionFetcherLogging)
+
+// fetchers come and fetchers go, but statics are forever
+static BOOL gIsLoggingEnabled = NO;
+static BOOL gIsLoggingToFile = YES;
+static NSString *gLoggingDirectoryPath = nil;
+static NSString *gLogDirectoryForCurrentRun = nil;
+static NSString *gLoggingDateStamp = nil;
+static NSString *gLoggingProcessName = nil;
+
++ (void)setLoggingDirectory:(NSString *)path {
+  gLoggingDirectoryPath = [path copy];
+}
+
++ (NSString *)loggingDirectory {
+  if (!gLoggingDirectoryPath) {
+    NSArray *paths = nil;
+#if TARGET_IPHONE_SIMULATOR
+    // default to a directory called GTMHTTPDebugLogs into a sandbox-safe
+    // directory that a developer can find easily, the application home
+    paths = @[ NSHomeDirectory() ];
+#elif TARGET_OS_IPHONE
+    // Neither ~/Desktop nor ~/Home is writable on an actual iPhone device.
+    // Put it in ~/Documents.
+    paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
+#else
+    // default to a directory called GTMHTTPDebugLogs in the desktop folder
+    paths = NSSearchPathForDirectoriesInDomains(NSDesktopDirectory, NSUserDomainMask, YES);
+#endif
+
+    NSString *desktopPath = paths.firstObject;
+    if (desktopPath) {
+      NSString *const kGTMLogFolderName = @"GTMHTTPDebugLogs";
+      NSString *logsFolderPath = [desktopPath stringByAppendingPathComponent:kGTMLogFolderName];
+
+      NSFileManager *fileMgr = [NSFileManager defaultManager];
+      BOOL isDir;
+      BOOL doesFolderExist = [fileMgr fileExistsAtPath:logsFolderPath isDirectory:&isDir];
+      if (!doesFolderExist) {
+        // make the directory
+        doesFolderExist = [fileMgr createDirectoryAtPath:logsFolderPath
+                             withIntermediateDirectories:YES
+                                              attributes:nil
+                                                   error:NULL];
+      }
+      if (doesFolderExist) {
+        // it's there; store it in the global
+        gLoggingDirectoryPath = [logsFolderPath copy];
+      }
+    }
+  }
+  return gLoggingDirectoryPath;
+}
+
++ (void)setLogDirectoryForCurrentRun:(NSString *)logDirectoryForCurrentRun {
+  // Set the path for this run's logs.
+  gLogDirectoryForCurrentRun = [logDirectoryForCurrentRun copy];
+}
+
++ (NSString *)logDirectoryForCurrentRun {
+  // make a directory for this run's logs, like SyncProto_logs_10-16_01-56-58PM
+  if (gLogDirectoryForCurrentRun) return gLogDirectoryForCurrentRun;
+
+  NSString *parentDir = [self loggingDirectory];
+  NSString *logNamePrefix = [self processNameLogPrefix];
+  NSString *dateStamp = [self loggingDateStamp];
+  NSString *dirName = [NSString stringWithFormat:@"%@%@", logNamePrefix, dateStamp];
+  NSString *logDirectory = [parentDir stringByAppendingPathComponent:dirName];
+
+  if (gIsLoggingToFile) {
+    NSFileManager *fileMgr = [NSFileManager defaultManager];
+    // Be sure that the first time this app runs, it's not writing to a preexisting folder
+    static BOOL gShouldReuseFolder = NO;
+    if (!gShouldReuseFolder) {
+      gShouldReuseFolder = YES;
+      NSString *origLogDir = logDirectory;
+      for (int ctr = 2; ctr < 20; ++ctr) {
+        if (![fileMgr fileExistsAtPath:logDirectory]) break;
+
+        // append a digit
+        logDirectory = [origLogDir stringByAppendingFormat:@"_%d", ctr];
+      }
+    }
+    if (![fileMgr createDirectoryAtPath:logDirectory
+            withIntermediateDirectories:YES
+                             attributes:nil
+                                  error:NULL]) return nil;
+  }
+  gLogDirectoryForCurrentRun = logDirectory;
+
+  return gLogDirectoryForCurrentRun;
+}
+
++ (void)setLoggingEnabled:(BOOL)isLoggingEnabled {
+  gIsLoggingEnabled = isLoggingEnabled;
+}
+
++ (BOOL)isLoggingEnabled {
+  return gIsLoggingEnabled;
+}
+
++ (void)setLoggingToFileEnabled:(BOOL)isLoggingToFileEnabled {
+  gIsLoggingToFile = isLoggingToFileEnabled;
+}
+
++ (BOOL)isLoggingToFileEnabled {
+  return gIsLoggingToFile;
+}
+
++ (void)setLoggingProcessName:(NSString *)processName {
+  gLoggingProcessName = [processName copy];
+}
+
++ (NSString *)loggingProcessName {
+  // get the process name (once per run) replacing spaces with underscores
+  if (!gLoggingProcessName) {
+    NSString *procName = [[NSProcessInfo processInfo] processName];
+    gLoggingProcessName = [procName stringByReplacingOccurrencesOfString:@" " withString:@"_"];
+  }
+  return gLoggingProcessName;
+}
+
++ (void)setLoggingDateStamp:(NSString *)dateStamp {
+  gLoggingDateStamp = [dateStamp copy];
+}
+
++ (NSString *)loggingDateStamp {
+  // We'll pick one date stamp per run, so a run that starts at a later second
+  // will get a unique results html file
+  if (!gLoggingDateStamp) {
+    // produce a string like 08-21_01-41-23PM
+
+    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
+    [formatter setFormatterBehavior:NSDateFormatterBehavior10_4];
+    [formatter setDateFormat:@"M-dd_hh-mm-ssa"];
+
+    gLoggingDateStamp = [formatter stringFromDate:[NSDate date]];
+  }
+  return gLoggingDateStamp;
+}
+
++ (NSString *)processNameLogPrefix {
+  static NSString *gPrefix = nil;
+  if (!gPrefix) {
+    NSString *processName = [self loggingProcessName];
+    gPrefix = [[NSString alloc] initWithFormat:@"%@_log_", processName];
+  }
+  return gPrefix;
+}
+
++ (NSString *)symlinkNameSuffix {
+  return @"_log_newest.html";
+}
+
++ (NSString *)htmlFileName {
+  return @"aperçu_http_log.html";
+}
+
++ (void)deleteLogDirectoriesOlderThanDate:(NSDate *)cutoffDate {
+  NSFileManager *fileMgr = [NSFileManager defaultManager];
+  NSURL *parentDir = [NSURL fileURLWithPath:[[self class] loggingDirectory]];
+  NSURL *logDirectoryForCurrentRun =
+      [NSURL fileURLWithPath:[[self class] logDirectoryForCurrentRun]];
+  NSError *error;
+  NSArray *contents = [fileMgr contentsOfDirectoryAtURL:parentDir
+                             includingPropertiesForKeys:@[ NSURLContentModificationDateKey ]
+                                                options:0
+                                                  error:&error];
+  for (NSURL *itemURL in contents) {
+    if ([itemURL isEqual:logDirectoryForCurrentRun]) continue;
+
+    NSDate *modDate;
+    if ([itemURL getResourceValue:&modDate
+                           forKey:NSURLContentModificationDateKey
+                            error:&error]) {
+      if ([modDate compare:cutoffDate] == NSOrderedAscending) {
+        if (![fileMgr removeItemAtURL:itemURL error:&error]) {
+          NSLog(@"deleteLogDirectoriesOlderThanDate failed to delete %@: %@",
+                itemURL.path, error);
+        }
+      }
+    } else {
+      NSLog(@"deleteLogDirectoriesOlderThanDate failed to get mod date of %@: %@",
+            itemURL.path, error);
+    }
+  }
+}
+
+// formattedStringFromData returns a prettyprinted string for XML or JSON input,
+// and a plain string for other input data
+- (NSString *)formattedStringFromData:(NSData *)inputData
+                          contentType:(NSString *)contentType
+                                 JSON:(NSDictionary **)outJSON {
+  if (!inputData) return nil;
+
+  // if the content type is JSON and we have the parsing class available, use that
+  if ([contentType hasPrefix:@"application/json"] && inputData.length > 5) {
+    // convert from JSON string to NSObjects and back to a formatted string
+    NSMutableDictionary *obj = [NSJSONSerialization JSONObjectWithData:inputData
+                                                               options:NSJSONReadingMutableContainers
+                                                                 error:NULL];
+    if (obj) {
+      if (outJSON) *outJSON = obj;
+      if ([obj isKindOfClass:[NSMutableDictionary class]]) {
+        // for security and privacy, omit OAuth 2 response access and refresh tokens
+        if ([obj valueForKey:@"refresh_token"] != nil) {
+          [obj setObject:@"_snip_" forKey:@"refresh_token"];
+        }
+        if ([obj valueForKey:@"access_token"] != nil) {
+          [obj setObject:@"_snip_" forKey:@"access_token"];
+        }
+      }
+      NSData *data = [NSJSONSerialization dataWithJSONObject:obj
+                                                     options:NSJSONWritingPrettyPrinted
+                                                       error:NULL];
+      if (data) {
+        NSString *jsonStr = [[NSString alloc] initWithData:data
+                                                  encoding:NSUTF8StringEncoding];
+        return jsonStr;
+      }
+    }
+  }
+
+#if !TARGET_OS_IPHONE && !GTM_SKIP_LOG_XMLFORMAT
+  // verify that this data starts with the bytes indicating XML
+
+  NSString *const kXMLLintPath = @"/usr/bin/xmllint";
+  static BOOL gHasCheckedAvailability = NO;
+  static BOOL gIsXMLLintAvailable = NO;
+
+  if (!gHasCheckedAvailability) {
+    gIsXMLLintAvailable = [[NSFileManager defaultManager] fileExistsAtPath:kXMLLintPath];
+    gHasCheckedAvailability = YES;
+  }
+  if (gIsXMLLintAvailable
+      && inputData.length > 5
+      && strncmp(inputData.bytes, "<?xml", 5) == 0) {
+
+    // call xmllint to format the data
+    NSTask *task = [[NSTask alloc] init];
+    [task setLaunchPath:kXMLLintPath];
+
+    // use the dash argument to specify stdin as the source file
+    [task setArguments:@[ @"--format", @"-" ]];
+    [task setEnvironment:@{}];
+
+    NSPipe *inputPipe = [NSPipe pipe];
+    NSPipe *outputPipe = [NSPipe pipe];
+    [task setStandardInput:inputPipe];
+    [task setStandardOutput:outputPipe];
+
+    [task launch];
+
+    [[inputPipe fileHandleForWriting] writeData:inputData];
+    [[inputPipe fileHandleForWriting] closeFile];
+
+    // drain the stdout before waiting for the task to exit
+    NSData *formattedData = [[outputPipe fileHandleForReading] readDataToEndOfFile];
+
+    [task waitUntilExit];
+
+    int status = [task terminationStatus];
+    if (status == 0 && formattedData.length > 0) {
+      // success
+      inputData = formattedData;
+    }
+  }
+#else
+  // we can't call external tasks on the iPhone; leave the XML unformatted
+#endif
+
+  NSString *dataStr = [[NSString alloc] initWithData:inputData
+                                            encoding:NSUTF8StringEncoding];
+  return dataStr;
+}
+
+// stringFromStreamData creates a string given the supplied data
+//
+// If NSString can create a UTF-8 string from the data, then that is returned.
+//
+// Otherwise, this routine tries to find a MIME boundary at the beginning of the data block, and
+// uses that to break up the data into parts. Each part will be used to try to make a UTF-8 string.
+// For parts that fail, a replacement string showing the part header and <<n bytes>> is supplied
+// in place of the binary data.
+
+- (NSString *)stringFromStreamData:(NSData *)data
+                       contentType:(NSString *)contentType {
+
+  if (!data) return nil;
+
+  // optimistically, see if the whole data block is UTF-8
+  NSString *streamDataStr = [self formattedStringFromData:data
+                                              contentType:contentType
+                                                     JSON:NULL];
+  if (streamDataStr) return streamDataStr;
+
+  // Munge a buffer by replacing non-ASCII bytes with underscores, and turn that munged buffer an
+  // NSString.  That gives us a string we can use with NSScanner.
+  NSMutableData *mutableData = [NSMutableData dataWithData:data];
+  unsigned char *bytes = (unsigned char *)mutableData.mutableBytes;
+
+  for (unsigned int idx = 0; idx < mutableData.length; ++idx) {
+    if (bytes[idx] > 0x7F || bytes[idx] == 0) {
+      bytes[idx] = '_';
+    }
+  }
+
+  NSString *mungedStr = [[NSString alloc] initWithData:mutableData
+                                              encoding:NSUTF8StringEncoding];
+  if (mungedStr) {
+
+    // scan for the boundary string
+    NSString *boundary = nil;
+    NSScanner *scanner = [NSScanner scannerWithString:mungedStr];
+
+    if ([scanner scanUpToString:@"\r\n" intoString:&boundary]
+        && [boundary hasPrefix:@"--"]) {
+
+      // we found a boundary string; use it to divide the string into parts
+      NSArray *mungedParts = [mungedStr componentsSeparatedByString:boundary];
+
+      // look at each munged part in the original string, and try to convert those into UTF-8
+      NSMutableArray *origParts = [NSMutableArray array];
+      NSUInteger offset = 0;
+      for (NSString *mungedPart in mungedParts) {
+        NSUInteger partSize = mungedPart.length;
+        NSData *origPartData = [data subdataWithRange:NSMakeRange(offset, partSize)];
+        NSString *origPartStr = [[NSString alloc] initWithData:origPartData
+                                                      encoding:NSUTF8StringEncoding];
+        if (origPartStr) {
+          // we could make this original part into UTF-8; use the string
+          [origParts addObject:origPartStr];
+        } else {
+          // this part can't be made into UTF-8; scan the header, if we can
+          NSString *header = nil;
+          NSScanner *headerScanner = [NSScanner scannerWithString:mungedPart];
+          if (![headerScanner scanUpToString:@"\r\n\r\n" intoString:&header]) {
+            // we couldn't find a header
+            header = @"";
+          }
+          // make a part string with the header and <<n bytes>>
+          NSString *binStr = [NSString stringWithFormat:@"\r%@\r<<%lu bytes>>\r",
+                              header, (long)(partSize - header.length)];
+          [origParts addObject:binStr];
+        }
+        offset += partSize + boundary.length;
+      }
+      // rejoin the original parts
+      streamDataStr = [origParts componentsJoinedByString:boundary];
+    }
+  }
+  if (!streamDataStr) {
+    // give up; just make a string showing the uploaded bytes
+    streamDataStr = [NSString stringWithFormat:@"<<%u bytes>>", (unsigned int)data.length];
+  }
+  return streamDataStr;
+}
+
+// logFetchWithError is called following a successful or failed fetch attempt
+//
+// This method does all the work for appending to and creating log files
+
+- (void)logFetchWithError:(NSError *)error {
+  if (![[self class] isLoggingEnabled]) return;
+  NSString *logDirectory = [[self class] logDirectoryForCurrentRun];
+  if (!logDirectory) return;
+  NSString *processName = [[self class] loggingProcessName];
+
+  // TODO: add Javascript to display response data formatted in hex
+
+  // each response's NSData goes into its own xml or txt file, though all responses for this run of
+  // the app share a main html file. This counter tracks all fetch responses for this app run.
+  //
+  // we'll use a local variable since this routine may be reentered while waiting for XML formatting
+  // to be completed by an external task
+  static int gResponseCounter = 0;
+  int responseCounter = ++gResponseCounter;
+
+  NSURLResponse *response = [self response];
+  NSDictionary *responseHeaders = [self responseHeaders];
+  NSString *responseDataStr = nil;
+  NSDictionary *responseJSON = nil;
+
+  // if there's response data, decide what kind of file to put it in based on the first bytes of the
+  // file or on the mime type supplied by the server
+  NSString *responseMIMEType = [response MIMEType];
+  BOOL isResponseImage = NO;
+
+  // file name for an image data file
+  NSString *responseDataFileName = nil;
+
+  int64_t responseDataLength = self.downloadedLength;
+  if (responseDataLength > 0) {
+    NSData *downloadedData = self.downloadedData;
+    if (downloadedData == nil
+        && responseDataLength > 0
+        && responseDataLength < 20000
+        && self.destinationFileURL) {
+      // There's a download file that's not too big, so get the data to display from the downloaded
+      // file.
+      NSURL *destinationURL = self.destinationFileURL;
+      downloadedData = [NSData dataWithContentsOfURL:destinationURL];
+    }
+    NSString *responseType = [responseHeaders valueForKey:@"Content-Type"];
+    responseDataStr = [self formattedStringFromData:downloadedData
+                                        contentType:responseType
+                                               JSON:&responseJSON];
+    NSString *responseDataExtn = nil;
+    NSData *dataToWrite = nil;
+    if (responseDataStr) {
+      // we were able to make a UTF-8 string from the response data
+      if ([responseMIMEType isEqual:@"application/atom+xml"]
+          || [responseMIMEType hasSuffix:@"/xml"]) {
+        responseDataExtn = @"xml";
+        dataToWrite = [responseDataStr dataUsingEncoding:NSUTF8StringEncoding];
+      }
+    } else if ([responseMIMEType isEqual:@"image/jpeg"]) {
+      responseDataExtn = @"jpg";
+      dataToWrite = downloadedData;
+      isResponseImage = YES;
+    } else if ([responseMIMEType isEqual:@"image/gif"]) {
+      responseDataExtn = @"gif";
+      dataToWrite = downloadedData;
+      isResponseImage = YES;
+    } else if ([responseMIMEType isEqual:@"image/png"]) {
+      responseDataExtn = @"png";
+      dataToWrite = downloadedData;
+      isResponseImage = YES;
+    } else {
+      // add more non-text types here
+    }
+    // if we have an extension, save the raw data in a file with that extension
+    if (responseDataExtn && dataToWrite) {
+      // generate a response file base name like
+      NSString *responseBaseName = [NSString stringWithFormat:@"fetch_%d_response", responseCounter];
+      responseDataFileName = [responseBaseName stringByAppendingPathExtension:responseDataExtn];
+      NSString *responseDataFilePath = [logDirectory stringByAppendingPathComponent:responseDataFileName];
+
+      NSError *downloadedError = nil;
+      if (gIsLoggingToFile && ![dataToWrite writeToFile:responseDataFilePath
+                                                options:0
+                                                  error:&downloadedError]) {
+        NSLog(@"%@ logging write error:%@ (%@)", [self class], downloadedError, responseDataFileName);
+      }
+    }
+  }
+  // we'll have one main html file per run of the app
+  NSString *htmlName = [[self class] htmlFileName];
+  NSString *htmlPath =[logDirectory stringByAppendingPathComponent:htmlName];
+
+  // if the html file exists (from logging previous fetches) we don't need
+  // to re-write the header or the scripts
+  NSFileManager *fileMgr = [NSFileManager defaultManager];
+  BOOL didFileExist = [fileMgr fileExistsAtPath:htmlPath];
+
+  NSMutableString* outputHTML = [NSMutableString string];
+
+  // we need a header to say we'll have UTF-8 text
+  if (!didFileExist) {
+    [outputHTML appendFormat:@"<html><head><meta http-equiv=\"content-type\" "
+        "content=\"text/html; charset=UTF-8\"><title>%@ HTTP fetch log %@</title>",
+        processName, [[self class] loggingDateStamp]];
+  }
+  // now write the visible html elements
+  NSString *copyableFileName = [NSString stringWithFormat:@"fetch_%d.txt", responseCounter];
+
+  NSDate *now = [NSDate date];
+  // write the date & time, the comment, and the link to the plain-text (copyable) log
+  [outputHTML appendFormat:@"<b>%@ &nbsp;&nbsp;&nbsp;&nbsp; ", now];
+
+  NSString *comment = [self comment];
+  if (comment.length > 0) {
+    [outputHTML appendFormat:@"%@ &nbsp;&nbsp;&nbsp;&nbsp; ", comment];
+  }
+  [outputHTML appendFormat:@"</b><a href='%@'><i>request/response log</i></a><br>", copyableFileName];
+  NSTimeInterval elapsed = -self.initialBeginFetchDate.timeIntervalSinceNow;
+  [outputHTML appendFormat:@"elapsed: %5.3fsec<br>", elapsed];
+
+  // write the request URL
+  NSURLRequest *request = self.request;
+  NSString *requestMethod = request.HTTPMethod;
+  NSURL *requestURL = request.URL;
+
+  // Save the request URL for next time in case this redirects.
+  NSString *redirectedFromURLString = [self.redirectedFromURL absoluteString];
+  self.redirectedFromURL = [requestURL copy];
+  if (redirectedFromURLString) {
+    [outputHTML appendFormat:@"<FONT COLOR='#990066'><i>redirected from %@</i></FONT><br>",
+                              redirectedFromURLString];
+  }
+  [outputHTML appendFormat:@"<b>request:</b> %@ <code>%@</code><br>\n", requestMethod, requestURL];
+
+  // write the request headers
+  NSDictionary *requestHeaders = request.allHTTPHeaderFields;
+  NSUInteger numberOfRequestHeaders = requestHeaders.count;
+  if (numberOfRequestHeaders > 0) {
+    // Indicate if the request is authorized; warn if the request is authorized but non-SSL
+    NSString *auth = [requestHeaders objectForKey:@"Authorization"];
+    NSString *headerDetails = @"";
+    if (auth) {
+      BOOL isInsecure = [[requestURL scheme] isEqual:@"http"];
+      if (isInsecure) {
+        // 26A0 = ⚠
+        headerDetails =
+            @"&nbsp;&nbsp;&nbsp;<i>authorized, non-SSL</i><FONT COLOR='#FF00FF'> &#x26A0;</FONT> ";
+      } else {
+        headerDetails = @"&nbsp;&nbsp;&nbsp;<i>authorized</i>";
+      }
+    }
+    NSString *cookiesHdr = [requestHeaders objectForKey:@"Cookie"];
+    if (cookiesHdr) {
+      headerDetails = [headerDetails stringByAppendingString:@"&nbsp;&nbsp;&nbsp;<i>cookies</i>"];
+    }
+    NSString *matchHdr = [requestHeaders objectForKey:@"If-Match"];
+    if (matchHdr) {
+      headerDetails = [headerDetails stringByAppendingString:@"&nbsp;&nbsp;&nbsp;<i>if-match</i>"];
+    }
+    matchHdr = [requestHeaders objectForKey:@"If-None-Match"];
+    if (matchHdr) {
+      headerDetails = [headerDetails stringByAppendingString:@"&nbsp;&nbsp;&nbsp;<i>if-none-match</i>"];
+    }
+    [outputHTML appendFormat:@"&nbsp;&nbsp; headers: %d  %@<br>",
+                              (int)numberOfRequestHeaders, headerDetails];
+  } else {
+    [outputHTML appendFormat:@"&nbsp;&nbsp; headers: none<br>"];
+  }
+  // write the request post data
+  NSData *bodyData = nil;
+  NSData *loggedStreamData = self.loggedStreamData;
+  if (loggedStreamData) {
+    bodyData = loggedStreamData;
+  } else {
+    bodyData = self.bodyData;
+    if (bodyData == nil) {
+      bodyData = self.request.HTTPBody;
+    }
+  }
+  uint64_t bodyDataLength = bodyData.length;
+
+  if (bodyData.length == 0) {
+    // If the data is in a body upload file URL, read that in if it's not huge.
+    NSURL *bodyFileURL = self.bodyFileURL;
+    if (bodyFileURL) {
+      NSNumber *fileSizeNum = nil;
+      NSError *fileSizeError = nil;
+      if ([bodyFileURL getResourceValue:&fileSizeNum
+                                 forKey:NSURLFileSizeKey
+                                  error:&fileSizeError]) {
+        bodyDataLength = [fileSizeNum unsignedLongLongValue];
+        if (bodyDataLength > 0 && bodyDataLength < 50000) {
+          bodyData = [NSData dataWithContentsOfURL:bodyFileURL
+                                           options:NSDataReadingUncached
+                                             error:&fileSizeError];
+        }
+      }
+    }
+  }
+  NSString *bodyDataStr = nil;
+  NSString *postType = [requestHeaders valueForKey:@"Content-Type"];
+
+  if (bodyDataLength > 0) {
+    [outputHTML appendFormat:@"&nbsp;&nbsp; data: %llu bytes, <code>%@</code><br>\n",
+                              bodyDataLength, postType ? postType : @"(no type)"];
+    NSString *logRequestBody = self.logRequestBody;
+    if (logRequestBody) {
+      bodyDataStr = [logRequestBody copy];
+      self.logRequestBody = nil;
+    } else {
+      bodyDataStr = [self stringFromStreamData:bodyData
+                                   contentType:postType];
+      if (bodyDataStr) {
+        // remove OAuth 2 client secret and refresh token
+        bodyDataStr = [[self class] snipSubstringOfString:bodyDataStr
+                                       betweenStartString:@"client_secret="
+                                                endString:@"&"];
+        bodyDataStr = [[self class] snipSubstringOfString:bodyDataStr
+                                       betweenStartString:@"refresh_token="
+                                                endString:@"&"];
+        // remove ClientLogin password
+        bodyDataStr = [[self class] snipSubstringOfString:bodyDataStr
+                                       betweenStartString:@"&Passwd="
+                                                endString:@"&"];
+      }
+    }
+  } else {
+    // no post data
+  }
+  // write the response status, MIME type, URL
+  NSInteger status = [self statusCode];
+  if (response) {
+    NSString *statusString = @"";
+    if (status != 0) {
+      if (status == 200 || status == 201) {
+        statusString = [NSString stringWithFormat:@"%ld", (long)status];
+
+        // report any JSON-RPC error
+        if ([responseJSON isKindOfClass:[NSDictionary class]]) {
+          NSDictionary *jsonError = [responseJSON objectForKey:@"error"];
+          if ([jsonError isKindOfClass:[NSDictionary class]]) {
+            NSString *jsonCode = [[jsonError valueForKey:@"code"] description];
+            NSString *jsonMessage = [jsonError valueForKey:@"message"];
+            if (jsonCode || jsonMessage) {
+              // 2691 = ⚑
+              NSString *const jsonErrFmt =
+                  @"&nbsp;&nbsp;&nbsp;<i>JSON error:</i> <FONT COLOR='#FF00FF'>%@ %@ &nbsp;&#x2691;</FONT>";
+              statusString = [statusString stringByAppendingFormat:jsonErrFmt,
+                              jsonCode ? jsonCode : @"",
+                              jsonMessage ? jsonMessage : @""];
+            }
+          }
+        }
+      } else {
+        // purple for anything other than 200 or 201
+        NSString *flag = status >= 400 ? @"&nbsp;&#x2691;" : @""; // 2691 = ⚑
+        NSString *explanation = [NSHTTPURLResponse localizedStringForStatusCode:status];
+        NSString *const statusFormat = @"<FONT COLOR='#FF00FF'>%ld %@ %@</FONT>";
+        statusString = [NSString stringWithFormat:statusFormat, (long)status, explanation, flag];
+      }
+    }
+    // show the response URL only if it's different from the request URL
+    NSString *responseURLStr = @"";
+    NSURL *responseURL = response.URL;
+
+    if (responseURL && ![responseURL isEqual:request.URL]) {
+      NSString *const responseURLFormat =
+          @"<FONT COLOR='#FF00FF'>response URL:</FONT> <code>%@</code><br>\n";
+      responseURLStr = [NSString stringWithFormat:responseURLFormat, [responseURL absoluteString]];
+    }
+    [outputHTML appendFormat:@"<b>response:</b>&nbsp;&nbsp;status %@<br>\n%@",
+                              statusString, responseURLStr];
+    // Write the response headers
+    NSUInteger numberOfResponseHeaders = responseHeaders.count;
+    if (numberOfResponseHeaders > 0) {
+      // Indicate if the server is setting cookies
+      NSString *cookiesSet = [responseHeaders valueForKey:@"Set-Cookie"];
+      NSString *cookiesStr =
+          cookiesSet ? @"&nbsp;&nbsp;<FONT COLOR='#990066'><i>sets cookies</i></FONT>" : @"";
+      // Indicate if the server is redirecting
+      NSString *location = [responseHeaders valueForKey:@"Location"];
+      BOOL isRedirect = status >= 300 && status <= 399 && location != nil;
+      NSString *redirectsStr =
+          isRedirect ? @"&nbsp;&nbsp;<FONT COLOR='#990066'><i>redirects</i></FONT>" : @"";
+      [outputHTML appendFormat:@"&nbsp;&nbsp; headers: %d  %@ %@<br>\n",
+                                (int)numberOfResponseHeaders, cookiesStr, redirectsStr];
+    } else {
+      [outputHTML appendString:@"&nbsp;&nbsp; headers: none<br>\n"];
+    }
+  }
+  // error
+  if (error) {
+    [outputHTML appendFormat:@"<b>Error:</b> %@ <br>\n", error.description];
+  }
+  // Write the response data
+  if (responseDataFileName) {
+    if (isResponseImage) {
+      // Make a small inline image that links to the full image file
+      [outputHTML appendFormat:@"&nbsp;&nbsp; data: %lld bytes, <code>%@</code><br>",
+                                responseDataLength, responseMIMEType];
+      NSString *const fmt =
+          @"<a href=\"%@\"><img src='%@' alt='image' style='border:solid thin;max-height:32'></a>\n";
+      [outputHTML appendFormat:fmt, responseDataFileName, responseDataFileName];
+    } else {
+      // The response data was XML; link to the xml file
+      NSString *const fmt =
+          @"&nbsp;&nbsp; data: %lld bytes, <code>%@</code>&nbsp;&nbsp;&nbsp;<i><a href=\"%@\">%@</a></i>\n";
+      [outputHTML appendFormat:fmt, responseDataLength, responseMIMEType,
+                               responseDataFileName, [responseDataFileName pathExtension]];
+    }
+  } else {
+    // The response data was not an image; just show the length and MIME type
+    [outputHTML appendFormat:@"&nbsp;&nbsp; data: %lld bytes, <code>%@</code>\n",
+        responseDataLength, responseMIMEType ? responseMIMEType : @"(no response type)"];
+  }
+  // Make a single string of the request and response, suitable for copying
+  // to the clipboard and pasting into a bug report
+  NSMutableString *copyable = [NSMutableString string];
+  if (comment) {
+    [copyable appendFormat:@"%@\n\n", comment];
+  }
+  [copyable appendFormat:@"%@  elapsed: %5.3fsec\n", now, elapsed];
+  if (redirectedFromURLString) {
+    [copyable appendFormat:@"Redirected from %@\n", redirectedFromURLString];
+  }
+  [copyable appendFormat:@"Request: %@ %@\n", requestMethod, requestURL];
+  if (requestHeaders.count > 0) {
+    [copyable appendFormat:@"Request headers:\n%@\n",
+                            [[self class] headersStringForDictionary:requestHeaders]];
+  }
+  if (bodyDataLength > 0) {
+    [copyable appendFormat:@"Request body: (%llu bytes)\n", bodyDataLength];
+    if (bodyDataStr) {
+      [copyable appendFormat:@"%@\n", bodyDataStr];
+    }
+    [copyable appendString:@"\n"];
+  }
+  if (response) {
+    [copyable appendFormat:@"Response: status %d\n", (int) status];
+    [copyable appendFormat:@"Response headers:\n%@\n",
+                            [[self class] headersStringForDictionary:responseHeaders]];
+    [copyable appendFormat:@"Response body: (%lld bytes)\n", responseDataLength];
+    if (responseDataLength > 0) {
+      NSString *logResponseBody = self.logResponseBody;
+      if (logResponseBody) {
+        // The user has provided the response body text.
+        responseDataStr = [logResponseBody copy];
+        self.logResponseBody = nil;
+      }
+      if (responseDataStr != nil) {
+        [copyable appendFormat:@"%@\n", responseDataStr];
+      } else {
+        // Even though it's redundant, we'll put in text to indicate that all the bytes are binary.
+        if (self.destinationFileURL) {
+          [copyable appendFormat:@"<<%lld bytes>>  to file %@\n",
+           responseDataLength, self.destinationFileURL.path];
+        } else {
+          [copyable appendFormat:@"<<%lld bytes>>\n", responseDataLength];
+        }
+      }
+    }
+  }
+  if (error) {
+    [copyable appendFormat:@"Error: %@\n", error];
+  }
+  // Save to log property before adding the separator
+  self.log = copyable;
+
+  [copyable appendString:@"-----------------------------------------------------------\n"];
+
+  // Write the copyable version to another file (linked to at the top of the html file, above)
+  //
+  // Ideally, something to just copy this to the clipboard like
+  //   <span onCopy='window.event.clipboardData.setData(\"Text\",
+  //   \"copyable stuff\");return false;'>Copy here.</span>"
+  // would work everywhere, but it only works in Safari as of 8/2010
+  if (gIsLoggingToFile) {
+    NSString *parentDir = [[self class] loggingDirectory];
+    NSString *copyablePath = [logDirectory stringByAppendingPathComponent:copyableFileName];
+    NSError *copyableError = nil;
+    if (![copyable writeToFile:copyablePath
+                    atomically:NO
+                      encoding:NSUTF8StringEncoding
+                         error:&copyableError]) {
+      // Error writing to file
+      NSLog(@"%@ logging write error:%@ (%@)", [self class], copyableError, copyablePath);
+    }
+    [outputHTML appendString:@"<br><hr><p>"];
+
+    // Append the HTML to the main output file
+    const char* htmlBytes = outputHTML.UTF8String;
+    NSOutputStream *stream = [NSOutputStream outputStreamToFileAtPath:htmlPath
+                                                               append:YES];
+    [stream open];
+    [stream write:(const uint8_t *) htmlBytes maxLength:strlen(htmlBytes)];
+    [stream close];
+
+    // Make a symlink to the latest html
+    NSString *const symlinkNameSuffix = [[self class] symlinkNameSuffix];
+    NSString *symlinkName = [processName stringByAppendingString:symlinkNameSuffix];
+    NSString *symlinkPath = [parentDir stringByAppendingPathComponent:symlinkName];
+
+    [fileMgr removeItemAtPath:symlinkPath error:NULL];
+    [fileMgr createSymbolicLinkAtPath:symlinkPath
+                  withDestinationPath:htmlPath
+                                error:NULL];
+#if TARGET_OS_IPHONE
+    static BOOL gReportedLoggingPath = NO;
+    if (!gReportedLoggingPath) {
+      gReportedLoggingPath = YES;
+      NSLog(@"GTMSessionFetcher logging to \"%@\"", parentDir);
+    }
+#endif
+  }
+}
+
+- (NSInputStream *)loggedInputStreamForInputStream:(NSInputStream *)inputStream {
+  if (!inputStream) return nil;
+  if (![GTMSessionFetcher isLoggingEnabled]) return inputStream;
+
+  [self clearLoggedStreamData];  // Clear any previous data.
+  Class monitorClass = NSClassFromString(@"GTMReadMonitorInputStream");
+  if (!monitorClass) {
+    NSString const *str = @"<<Uploaded stream log unavailable without GTMReadMonitorInputStream>>";
+    NSData *stringData = [str dataUsingEncoding:NSUTF8StringEncoding];
+    [self appendLoggedStreamData:stringData];
+    return inputStream;
+  }
+  inputStream = [monitorClass inputStreamWithStream:inputStream];
+
+  GTMReadMonitorInputStream *readMonitorInputStream = (GTMReadMonitorInputStream *)inputStream;
+  [readMonitorInputStream setReadDelegate:self];
+  SEL readSel = @selector(inputStream:readIntoBuffer:length:);
+  [readMonitorInputStream setReadSelector:readSel];
+
+  return inputStream;
+}
+
+- (GTMSessionFetcherBodyStreamProvider)loggedStreamProviderForStreamProvider:
+    (GTMSessionFetcherBodyStreamProvider)streamProvider {
+  if (!streamProvider) return nil;
+  if (![GTMSessionFetcher isLoggingEnabled]) return streamProvider;
+
+  [self clearLoggedStreamData];  // Clear any previous data.
+  Class monitorClass = NSClassFromString(@"GTMReadMonitorInputStream");
+  if (!monitorClass) {
+    NSString const *str = @"<<Uploaded stream log unavailable without GTMReadMonitorInputStream>>";
+    NSData *stringData = [str dataUsingEncoding:NSUTF8StringEncoding];
+    [self appendLoggedStreamData:stringData];
+    return streamProvider;
+  }
+  GTMSessionFetcherBodyStreamProvider loggedStreamProvider =
+      ^(GTMSessionFetcherBodyStreamProviderResponse response) {
+      streamProvider(^(NSInputStream *bodyStream) {
+          bodyStream = [self loggedInputStreamForInputStream:bodyStream];
+          response(bodyStream);
+      });
+  };
+  return loggedStreamProvider;
+}
+
+@end
+
+@implementation GTMSessionFetcher (GTMSessionFetcherLoggingUtilities)
+
+- (void)inputStream:(GTMReadMonitorInputStream *)stream
+     readIntoBuffer:(void *)buffer
+             length:(int64_t)length {
+  // append the captured data
+  NSData *data = [NSData dataWithBytesNoCopy:buffer
+                                      length:(NSUInteger)length
+                                freeWhenDone:NO];
+  [self appendLoggedStreamData:data];
+}
+
+#pragma mark Fomatting Utilities
+
++ (NSString *)snipSubstringOfString:(NSString *)originalStr
+                 betweenStartString:(NSString *)startStr
+                          endString:(NSString *)endStr {
+#if SKIP_GTM_FETCH_LOGGING_SNIPPING
+  return originalStr;
+#else
+  if (!originalStr) return nil;
+
+  // Find the start string, and replace everything between it
+  // and the end string (or the end of the original string) with "_snip_"
+  NSRange startRange = [originalStr rangeOfString:startStr];
+  if (startRange.location == NSNotFound) return originalStr;
+
+  // We found the start string
+  NSUInteger originalLength = originalStr.length;
+  NSUInteger startOfTarget = NSMaxRange(startRange);
+  NSRange targetAndRest = NSMakeRange(startOfTarget, originalLength - startOfTarget);
+  NSRange endRange = [originalStr rangeOfString:endStr
+                                        options:0
+                                          range:targetAndRest];
+  NSRange replaceRange;
+  if (endRange.location == NSNotFound) {
+    // Found no end marker so replace to end of string
+    replaceRange = targetAndRest;
+  } else {
+    // Replace up to the endStr
+    replaceRange = NSMakeRange(startOfTarget, endRange.location - startOfTarget);
+  }
+  NSString *result = [originalStr stringByReplacingCharactersInRange:replaceRange
+                                                          withString:@"_snip_"];
+  return result;
+#endif // SKIP_GTM_FETCH_LOGGING_SNIPPING
+}
+
++ (NSString *)headersStringForDictionary:(NSDictionary *)dict {
+  // Format the dictionary in http header style, like
+  //   Accept:        application/json
+  //   Cache-Control: no-cache
+  //   Content-Type:  application/json; charset=utf-8
+  //
+  // Pad the key names, but not beyond 16 chars, since long custom header
+  // keys just create too much whitespace
+  NSArray *keys = [dict.allKeys sortedArrayUsingSelector:@selector(compare:)];
+
+  NSMutableString *str = [NSMutableString string];
+  for (NSString *key in keys) {
+    NSString *value = [dict valueForKey:key];
+    if ([key isEqual:@"Authorization"]) {
+      // Remove OAuth 1 token
+      value = [[self class] snipSubstringOfString:value
+                               betweenStartString:@"oauth_token=\""
+                                        endString:@"\""];
+
+      // Remove OAuth 2 bearer token (draft 16, and older form)
+      value = [[self class] snipSubstringOfString:value
+                               betweenStartString:@"Bearer "
+                                        endString:@"\n"];
+      value = [[self class] snipSubstringOfString:value
+                               betweenStartString:@"OAuth "
+                                        endString:@"\n"];
+
+      // Remove Google ClientLogin
+      value = [[self class] snipSubstringOfString:value
+                               betweenStartString:@"GoogleLogin auth="
+                                        endString:@"\n"];
+    }
+    [str appendFormat:@"  %@: %@\n", key, value];
+  }
+  return str;
+}
+
+@end
+
+#endif // !STRIP_GTM_FETCH_LOGGING
diff --git a/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcherService.h b/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcherService.h
new file mode 100644
index 0000000..a696ac7
--- /dev/null
+++ b/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcherService.h
@@ -0,0 +1,190 @@
+/* Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// For best performance and convenient usage, fetchers should be generated by a common
+// GTMSessionFetcherService instance, like
+//
+//   _fetcherService = [[GTMSessionFetcherService alloc] init];
+//   GTMSessionFetcher* myFirstFetcher = [_fetcherService fetcherWithRequest:request1];
+//   GTMSessionFetcher* mySecondFetcher = [_fetcherService fetcherWithRequest:request2];
+
+#import "GTMSessionFetcher.h"
+
+GTM_ASSUME_NONNULL_BEGIN
+
+// Notifications.
+
+// This notification indicates a reusable session has become invalid. It is intended mainly for the
+// service's unit tests.
+//
+// The notification object is the fetcher service.
+// The invalid session is provided via the userInfo kGTMSessionFetcherServiceSessionKey key.
+extern NSString *const kGTMSessionFetcherServiceSessionBecameInvalidNotification;
+extern NSString *const kGTMSessionFetcherServiceSessionKey;
+
+@interface GTMSessionFetcherService : NSObject<GTMSessionFetcherServiceProtocol>
+
+// Queues of delayed and running fetchers. Each dictionary contains arrays
+// of GTMSessionFetcher *fetchers, keyed by NSString *host
+@property(atomic, strong, readonly, GTM_NULLABLE) GTM_NSDictionaryOf(NSString *, NSArray *) *delayedFetchersByHost;
+@property(atomic, strong, readonly, GTM_NULLABLE) GTM_NSDictionaryOf(NSString *, NSArray *) *runningFetchersByHost;
+
+// A max value of 0 means no fetchers should be delayed.
+// The default limit is 10 simultaneous fetchers targeting each host.
+// This does not apply to fetchers whose useBackgroundSession property is YES. Since services are
+// not resurrected on an app relaunch, delayed fetchers would effectively be abandoned.
+@property(atomic, assign) NSUInteger maxRunningFetchersPerHost;
+
+// Properties to be applied to each fetcher; see GTMSessionFetcher.h for descriptions
+@property(atomic, strong, GTM_NULLABLE) NSURLSessionConfiguration *configuration;
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherConfigurationBlock configurationBlock;
+@property(atomic, strong, GTM_NULLABLE) NSHTTPCookieStorage *cookieStorage;
+@property(atomic, strong, GTM_NULL_RESETTABLE) dispatch_queue_t callbackQueue;
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherChallengeBlock challengeBlock;
+@property(atomic, strong, GTM_NULLABLE) NSURLCredential *credential;
+@property(atomic, strong) NSURLCredential *proxyCredential;
+@property(atomic, copy, GTM_NULLABLE) GTM_NSArrayOf(NSString *) *allowedInsecureSchemes;
+@property(atomic, assign) BOOL allowLocalhostRequest;
+@property(atomic, assign) BOOL allowInvalidServerCertificates;
+@property(atomic, assign, getter=isRetryEnabled) BOOL retryEnabled;
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherRetryBlock retryBlock;
+@property(atomic, assign) NSTimeInterval maxRetryInterval;
+@property(atomic, assign) NSTimeInterval minRetryInterval;
+@property(atomic, copy, GTM_NULLABLE) GTM_NSDictionaryOf(NSString *, id) *properties;
+
+#if GTM_BACKGROUND_TASK_FETCHING
+@property(atomic, assign) BOOL skipBackgroundTask;
+#endif
+
+// A default useragent of GTMFetcherStandardUserAgentString(nil) will be given to each fetcher
+// created by this service unless the request already has a user-agent header set.
+// This default will be added starting with builds with the SDKs for OS X 10.11 and iOS 9.
+//
+// To use the configuration's default user agent, set this property to nil.
+@property(atomic, copy, GTM_NULLABLE) NSString *userAgent;
+
+// The authorizer to attach to the created fetchers. If a specific fetcher should
+// not authorize its requests, the fetcher's authorizer property may be set to nil
+// before the fetch begins.
+@property(atomic, strong, GTM_NULLABLE) id<GTMFetcherAuthorizationProtocol> authorizer;
+
+// Delegate queue used by the session when calling back to the fetcher.  The default
+// is the main queue.  Changing this does not affect the queue used to call back to the
+// application; that is specified by the callbackQueue property above.
+@property(atomic, strong, GTM_NULL_RESETTABLE) NSOperationQueue *sessionDelegateQueue;
+
+// When enabled, indicates the same session should be used by subsequent fetchers.
+//
+// This is enabled by default.
+@property(atomic, assign) BOOL reuseSession;
+
+// Sets the delay until an unused session is invalidated.
+// The default interval is 60 seconds.
+//
+// If the interval is set to 0, then any reused session is not invalidated except by
+// explicitly invoking -resetSession.  Be aware that setting the interval to 0 thus
+// causes the session's delegate to be retained until the session is explicitly reset.
+@property(atomic, assign) NSTimeInterval unusedSessionTimeout;
+
+// If shouldReuseSession is enabled, this will force creation of a new session when future
+// fetchers begin.
+- (void)resetSession;
+
+// Create a fetcher
+//
+// These methods will return a fetcher. If successfully created, the connection
+// will hold a strong reference to it for the life of the connection as well.
+// So the caller doesn't have to hold onto the fetcher explicitly unless they
+// want to be able to monitor or cancel it.
+- (GTMSessionFetcher *)fetcherWithRequest:(NSURLRequest *)request;
+- (GTMSessionFetcher *)fetcherWithURL:(NSURL *)requestURL;
+- (GTMSessionFetcher *)fetcherWithURLString:(NSString *)requestURLString;
+
+// Common method for fetcher creation.
+//
+// -fetcherWithRequest:fetcherClass: may be overridden to customize creation of
+// fetchers.  This is the ONLY method in the GTMSessionFetcher library intended to
+// be overridden.
+- (id)fetcherWithRequest:(NSURLRequest *)request
+            fetcherClass:(Class)fetcherClass;
+
+- (BOOL)isDelayingFetcher:(GTMSessionFetcher *)fetcher;
+
+- (NSUInteger)numberOfFetchers;        // running + delayed fetchers
+- (NSUInteger)numberOfRunningFetchers;
+- (NSUInteger)numberOfDelayedFetchers;
+
+// Return a list of all running or delayed fetchers. This includes fetchers created
+// by the service which have been started and have not yet stopped.
+//
+// Returns an array of fetcher objects, or nil if none.
+- (GTM_NULLABLE GTM_NSArrayOf(GTMSessionFetcher *) *)issuedFetchers;
+
+// Search for running or delayed fetchers with the specified URL.
+//
+// Returns an array of fetcher objects found, or nil if none found.
+- (GTM_NULLABLE GTM_NSArrayOf(GTMSessionFetcher *) *)issuedFetchersWithRequestURL:(NSURL *)requestURL;
+
+- (void)stopAllFetchers;
+
+// Methods for use by the fetcher class only.
+- (GTM_NULLABLE NSURLSession *)session;
+- (GTM_NULLABLE NSURLSession *)sessionForFetcherCreation;
+- (GTM_NULLABLE id<NSURLSessionDelegate>)sessionDelegate;
+- (GTM_NULLABLE NSDate *)stoppedAllFetchersDate;
+
+// The testBlock can inspect its fetcher parameter's request property to
+// determine which fetcher is being faked.
+@property(atomic, copy, GTM_NULLABLE) GTMSessionFetcherTestBlock testBlock;
+
+@end
+
+@interface GTMSessionFetcherService (TestingSupport)
+
+// Convenience method to create a fetcher service for testing.
+//
+// Fetchers generated by this mock fetcher service will not perform any
+// network operation, but will invoke callbacks and provide the supplied data
+// or error to the completion handler.
+//
+// You can make more customized mocks by setting the test block property of the service
+// or fetcher; the test block can inspect the fetcher's request or other properties.
+//
+// See the description of the testBlock property below.
++ (instancetype)mockFetcherServiceWithFakedData:(GTM_NULLABLE NSData *)fakedDataOrNil
+                                     fakedError:(GTM_NULLABLE NSError *)fakedErrorOrNil;
+
+// Spin the run loop and discard events (or, if not on the main thread, just sleep the thread)
+// until all running and delayed fetchers have completed.
+//
+// This is only for use in testing or in tools without a user interface.
+//
+// Synchronous fetches should never be done by shipping apps; they are
+// sufficient reason for rejection from the app store.
+//
+// Returns NO if timed out.
+- (BOOL)waitForCompletionOfAllFetchersWithTimeout:(NSTimeInterval)timeoutInSeconds;
+
+@end
+
+@interface GTMSessionFetcherService (BackwardsCompatibilityOnly)
+
+// Clients using GTMSessionFetcher should set the cookie storage explicitly themselves.
+// This method is just for compatibility with the old fetcher.
+@property(atomic, assign) NSInteger cookieStorageMethod;
+
+@end
+
+GTM_ASSUME_NONNULL_END
diff --git a/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcherService.m b/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcherService.m
new file mode 100644
index 0000000..fc6e6d9
--- /dev/null
+++ b/Example/Pods/GTMSessionFetcher/Source/GTMSessionFetcherService.m
@@ -0,0 +1,1352 @@
+/* Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+#import "GTMSessionFetcherService.h"
+
+NSString *const kGTMSessionFetcherServiceSessionBecameInvalidNotification
+    = @"kGTMSessionFetcherServiceSessionBecameInvalidNotification";
+NSString *const kGTMSessionFetcherServiceSessionKey
+    = @"kGTMSessionFetcherServiceSessionKey";
+
+#if !GTMSESSION_BUILD_COMBINED_SOURCES
+@interface GTMSessionFetcher (ServiceMethods)
+- (BOOL)beginFetchMayDelay:(BOOL)mayDelay
+              mayAuthorize:(BOOL)mayAuthorize;
+@end
+#endif  // !GTMSESSION_BUILD_COMBINED_SOURCES
+
+@interface GTMSessionFetcherService ()
+
+@property(atomic, strong, readwrite) NSDictionary *delayedFetchersByHost;
+@property(atomic, strong, readwrite) NSDictionary *runningFetchersByHost;
+
+@end
+
+// Since NSURLSession doesn't support a separate delegate per task (!), instances of this
+// class serve as a session delegate trampoline.
+//
+// This class maps a session's tasks to fetchers, and resends delegate messages to the task's
+// fetcher.
+@interface GTMSessionFetcherSessionDelegateDispatcher : NSObject<NSURLSessionDelegate>
+
+// The session for the tasks in this dispatcher's task-to-fetcher map.
+@property(atomic) NSURLSession *session;
+
+// The timer interval for invalidating a session that has no active tasks.
+@property(atomic) NSTimeInterval discardInterval;
+
+// The current discard timer.
+@property(atomic, readonly) NSTimer *discardTimer;
+
+
+- (instancetype)initWithParentService:(GTMSessionFetcherService *)parentService
+               sessionDiscardInterval:(NSTimeInterval)discardInterval;
+
+- (void)setFetcher:(GTMSessionFetcher *)fetcher
+           forTask:(NSURLSessionTask *)task;
+- (void)removeFetcher:(GTMSessionFetcher *)fetcher;
+
+// Before using a session, tells the delegate dispatcher to stop the discard timer.
+- (void)startSessionUsage;
+
+// When abandoning a delegate dispatcher, we want to avoid the session retaining
+// the delegate after tasks complete.
+- (void)abandon;
+
+@end
+
+
+@implementation GTMSessionFetcherService {
+  NSMutableDictionary *_delayedFetchersByHost;
+  NSMutableDictionary *_runningFetchersByHost;
+  NSUInteger _maxRunningFetchersPerHost;
+
+  // When this ivar is nil, the service will not reuse sessions.
+  GTMSessionFetcherSessionDelegateDispatcher *_delegateDispatcher;
+
+  // Fetchers will wait on this if another fetcher is creating the shared NSURLSession.
+  dispatch_semaphore_t _sessionCreationSemaphore;
+
+  dispatch_queue_t _callbackQueue;
+  NSOperationQueue *_delegateQueue;
+  NSHTTPCookieStorage *_cookieStorage;
+  NSString *_userAgent;
+  NSTimeInterval _timeout;
+
+  NSURLCredential *_credential;       // Username & password.
+  NSURLCredential *_proxyCredential;  // Credential supplied to proxy servers.
+
+  NSInteger _cookieStorageMethod;
+
+  id<GTMFetcherAuthorizationProtocol> _authorizer;
+
+  // For waitForCompletionOfAllFetchersWithTimeout: we need to wait on stopped fetchers since
+  // they've not yet finished invoking their queued callbacks. This array is nil except when
+  // waiting on fetchers.
+  NSMutableArray *_stoppedFetchersToWaitFor;
+
+  // For fetchers that enqueued their callbacks before stopAllFetchers was called on the service,
+  // set a barrier so the callbacks know to bail out.
+  NSDate *_stoppedAllFetchersDate;
+}
+
+@synthesize maxRunningFetchersPerHost = _maxRunningFetchersPerHost,
+            configuration = _configuration,
+            configurationBlock = _configurationBlock,
+            cookieStorage = _cookieStorage,
+            userAgent = _userAgent,
+            challengeBlock = _challengeBlock,
+            credential = _credential,
+            proxyCredential = _proxyCredential,
+            allowedInsecureSchemes = _allowedInsecureSchemes,
+            allowLocalhostRequest = _allowLocalhostRequest,
+            allowInvalidServerCertificates = _allowInvalidServerCertificates,
+            retryEnabled = _retryEnabled,
+            retryBlock = _retryBlock,
+            maxRetryInterval = _maxRetryInterval,
+            minRetryInterval = _minRetryInterval,
+            properties = _properties,
+            unusedSessionTimeout = _unusedSessionTimeout,
+            testBlock = _testBlock;
+
+#if GTM_BACKGROUND_TASK_FETCHING
+@synthesize skipBackgroundTask = _skipBackgroundTask;
+#endif
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    _delayedFetchersByHost = [[NSMutableDictionary alloc] init];
+    _runningFetchersByHost = [[NSMutableDictionary alloc] init];
+    _maxRunningFetchersPerHost = 10;
+    _cookieStorageMethod = -1;
+    _unusedSessionTimeout = 60.0;
+    _delegateDispatcher =
+        [[GTMSessionFetcherSessionDelegateDispatcher alloc] initWithParentService:self
+                                                           sessionDiscardInterval:_unusedSessionTimeout];
+    _callbackQueue = dispatch_get_main_queue();
+
+    _delegateQueue = [[NSOperationQueue alloc] init];
+    _delegateQueue.maxConcurrentOperationCount = 1;
+    _delegateQueue.name = @"com.google.GTMSessionFetcher.NSURLSessionDelegateQueue";
+
+    _sessionCreationSemaphore = dispatch_semaphore_create(1);
+
+    // Starting with the SDKs for OS X 10.11/iOS 9, the service has a default useragent.
+    // Apps can remove this and get the default system "CFNetwork" useragent by setting the
+    // fetcher service's userAgent property to nil.
+#if (!TARGET_OS_IPHONE && defined(MAC_OS_X_VERSION_10_11) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_11) \
+    || (TARGET_OS_IPHONE && defined(__IPHONE_9_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_9_0)
+    _userAgent = GTMFetcherStandardUserAgentString(nil);
+#endif
+  }
+  return self;
+}
+
+- (void)dealloc {
+  [self detachAuthorizer];
+  [_delegateDispatcher abandon];
+}
+
+#pragma mark Generate a new fetcher
+
+// Clients may override this method. Clients should not override any other library methods.
+- (id)fetcherWithRequest:(NSURLRequest *)request
+            fetcherClass:(Class)fetcherClass {
+  GTMSessionFetcher *fetcher = [[fetcherClass alloc] initWithRequest:request
+                                                       configuration:self.configuration];
+  fetcher.callbackQueue = self.callbackQueue;
+  fetcher.sessionDelegateQueue = self.sessionDelegateQueue;
+  fetcher.challengeBlock = self.challengeBlock;
+  fetcher.credential = self.credential;
+  fetcher.proxyCredential = self.proxyCredential;
+  fetcher.authorizer = self.authorizer;
+  fetcher.cookieStorage = self.cookieStorage;
+  fetcher.allowedInsecureSchemes = self.allowedInsecureSchemes;
+  fetcher.allowLocalhostRequest = self.allowLocalhostRequest;
+  fetcher.allowInvalidServerCertificates = self.allowInvalidServerCertificates;
+  fetcher.configurationBlock = self.configurationBlock;
+  fetcher.retryEnabled = self.retryEnabled;
+  fetcher.retryBlock = self.retryBlock;
+  fetcher.maxRetryInterval = self.maxRetryInterval;
+  fetcher.minRetryInterval = self.minRetryInterval;
+  fetcher.properties = self.properties;
+  fetcher.service = self;
+  if (self.cookieStorageMethod >= 0) {
+    [fetcher setCookieStorageMethod:self.cookieStorageMethod];
+  }
+
+#if GTM_BACKGROUND_TASK_FETCHING
+  fetcher.skipBackgroundTask = self.skipBackgroundTask;
+#endif
+
+  NSString *userAgent = self.userAgent;
+  if (userAgent.length > 0
+      && [request valueForHTTPHeaderField:@"User-Agent"] == nil) {
+    [fetcher setRequestValue:userAgent
+          forHTTPHeaderField:@"User-Agent"];
+  }
+  fetcher.testBlock = self.testBlock;
+
+  return fetcher;
+}
+
+- (GTMSessionFetcher *)fetcherWithRequest:(NSURLRequest *)request {
+  return [self fetcherWithRequest:request
+                     fetcherClass:[GTMSessionFetcher class]];
+}
+
+- (GTMSessionFetcher *)fetcherWithURL:(NSURL *)requestURL {
+  return [self fetcherWithRequest:[NSURLRequest requestWithURL:requestURL]];
+}
+
+- (GTMSessionFetcher *)fetcherWithURLString:(NSString *)requestURLString {
+  NSURL *url = [NSURL URLWithString:requestURLString];
+  return [self fetcherWithURL:url];
+}
+
+// Returns a session for the fetcher's host, or nil.
+- (NSURLSession *)session {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    NSURLSession *session = _delegateDispatcher.session;
+    return session;
+  }
+}
+
+// Returns a session for the fetcher's host, or nil.  For shared sessions, this
+// waits on a semaphore, blocking other fetchers while the caller creates the
+// session if needed.
+- (NSURLSession *)sessionForFetcherCreation {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+    if (!_delegateDispatcher) {
+      // This fetcher is creating a non-shared session, so skip the semaphore usage.
+      return nil;
+    }
+  }
+
+  // Wait if another fetcher is currently creating a session; avoid waiting
+  // inside the @synchronized block, as that can deadlock.
+  dispatch_semaphore_wait(_sessionCreationSemaphore, DISPATCH_TIME_FOREVER);
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    // Before getting the NSURLSession for task creation, it is
+    // important to invalidate and nil out the session discard timer; otherwise
+    // the session can be invalidated between when it is returned to the
+    // fetcher, and when the fetcher attempts to create its NSURLSessionTask.
+    [_delegateDispatcher startSessionUsage];
+
+    NSURLSession *session = _delegateDispatcher.session;
+    if (session) {
+      // The calling fetcher will receive a preexisting session, so
+      // we can allow other fetchers to create a session.
+      dispatch_semaphore_signal(_sessionCreationSemaphore);
+    } else {
+      // No existing session was obtained, so the calling fetcher will create the session;
+      // it *must* invoke fetcherDidCreateSession: to signal the dispatcher's semaphore after
+      // the session has been created (or fails to be created) to avoid a hang.
+    }
+    return session;
+  }
+}
+
+- (id<NSURLSessionDelegate>)sessionDelegate {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _delegateDispatcher;
+  }
+}
+
+#pragma mark Queue Management
+
+- (void)addRunningFetcher:(GTMSessionFetcher *)fetcher
+                  forHost:(NSString *)host {
+  // Add to the array of running fetchers for this host, creating the array if needed.
+  NSMutableArray *runningForHost = [_runningFetchersByHost objectForKey:host];
+  if (runningForHost == nil) {
+    runningForHost = [NSMutableArray arrayWithObject:fetcher];
+    [_runningFetchersByHost setObject:runningForHost forKey:host];
+  } else {
+    [runningForHost addObject:fetcher];
+  }
+}
+
+- (void)addDelayedFetcher:(GTMSessionFetcher *)fetcher
+                  forHost:(NSString *)host {
+  // Add to the array of delayed fetchers for this host, creating the array if needed.
+  NSMutableArray *delayedForHost = [_delayedFetchersByHost objectForKey:host];
+  if (delayedForHost == nil) {
+    delayedForHost = [NSMutableArray arrayWithObject:fetcher];
+    [_delayedFetchersByHost setObject:delayedForHost forKey:host];
+  } else {
+    [delayedForHost addObject:fetcher];
+  }
+}
+
+- (BOOL)isDelayingFetcher:(GTMSessionFetcher *)fetcher {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    NSString *host = fetcher.request.URL.host;
+    if (host == nil) {
+      return NO;
+    }
+    NSArray *delayedForHost = [_delayedFetchersByHost objectForKey:host];
+    NSUInteger idx = [delayedForHost indexOfObjectIdenticalTo:fetcher];
+    BOOL isDelayed = (delayedForHost != nil) && (idx != NSNotFound);
+    return isDelayed;
+  }
+}
+
+- (BOOL)fetcherShouldBeginFetching:(GTMSessionFetcher *)fetcher {
+  // Entry point from the fetcher
+  NSURL *requestURL = fetcher.request.URL;
+  NSString *host = requestURL.host;
+
+  // Addresses "file:///path" case where localhost is the implicit host.
+  if (host.length == 0 && [requestURL isFileURL]) {
+    host = @"localhost";
+  }
+
+  if (host.length == 0) {
+    // Data URIs legitimately have no host, reject other hostless URLs.
+    GTMSESSION_ASSERT_DEBUG([[requestURL scheme] isEqual:@"data"], @"%@ lacks host", fetcher);
+    return YES;
+  }
+
+  BOOL shouldBeginResult;
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    NSMutableArray *runningForHost = [_runningFetchersByHost objectForKey:host];
+    if (runningForHost != nil
+        && [runningForHost indexOfObjectIdenticalTo:fetcher] != NSNotFound) {
+      GTMSESSION_ASSERT_DEBUG(NO, @"%@ was already running", fetcher);
+      return YES;
+    }
+
+    BOOL shouldRunNow = (fetcher.usingBackgroundSession
+                         || _maxRunningFetchersPerHost == 0
+                         || _maxRunningFetchersPerHost >
+                         [[self class] numberOfNonBackgroundSessionFetchers:runningForHost]);
+    if (shouldRunNow) {
+      [self addRunningFetcher:fetcher forHost:host];
+      shouldBeginResult = YES;
+    } else {
+      [self addDelayedFetcher:fetcher forHost:host];
+      shouldBeginResult = NO;
+    }
+  }  // @synchronized(self)
+
+  // We'll save the host that serves as the key for this fetcher's array
+  // to avoid any chance of the underlying request changing, stranding
+  // the fetcher in the wrong array
+  fetcher.serviceHost = host;
+
+  return shouldBeginResult;
+}
+
+- (void)startFetcher:(GTMSessionFetcher *)fetcher {
+  [fetcher beginFetchMayDelay:NO
+                 mayAuthorize:YES];
+}
+
+// Internal utility. Returns a fetcher's delegate if it's a dispatcher, or nil if the fetcher
+// is its own delegate and has no dispatcher.
+- (GTMSessionFetcherSessionDelegateDispatcher *)delegateDispatcherForFetcher:(GTMSessionFetcher *)fetcher {
+  GTMSessionCheckNotSynchronized(self);
+
+  NSURLSession *fetcherSession = fetcher.session;
+  if (fetcherSession) {
+    id<NSURLSessionDelegate> fetcherDelegate = fetcherSession.delegate;
+    BOOL hasDispatcher = (fetcherDelegate != nil && fetcherDelegate != fetcher);
+    if (hasDispatcher) {
+      GTMSESSION_ASSERT_DEBUG([fetcherDelegate isKindOfClass:[GTMSessionFetcherSessionDelegateDispatcher class]],
+                              @"Fetcher delegate class: %@", [fetcherDelegate class]);
+      return (GTMSessionFetcherSessionDelegateDispatcher *)fetcherDelegate;
+    }
+  }
+  return nil;
+}
+
+- (void)fetcherDidCreateSession:(GTMSessionFetcher *)fetcher {
+  if (fetcher.canShareSession) {
+    NSURLSession *fetcherSession = fetcher.session;
+    GTMSESSION_ASSERT_DEBUG(fetcherSession != nil, @"Fetcher missing its session: %@", fetcher);
+
+    GTMSessionFetcherSessionDelegateDispatcher *delegateDispatcher =
+        [self delegateDispatcherForFetcher:fetcher];
+    if (delegateDispatcher) {
+      GTMSESSION_ASSERT_DEBUG(delegateDispatcher.session == nil,
+                              @"Fetcher made an extra session: %@", fetcher);
+
+      // Save this fetcher's session.
+      delegateDispatcher.session = fetcherSession;
+
+      // Allow other fetchers to request this session now.
+      dispatch_semaphore_signal(_sessionCreationSemaphore);
+    }
+  }
+}
+
+- (void)fetcherDidBeginFetching:(GTMSessionFetcher *)fetcher {
+  // If this fetcher has a separate delegate with a shared session, then
+  // this fetcher should be added to the delegate's map of tasks to fetchers.
+  GTMSessionFetcherSessionDelegateDispatcher *delegateDispatcher =
+      [self delegateDispatcherForFetcher:fetcher];
+  if (delegateDispatcher) {
+    GTMSESSION_ASSERT_DEBUG(fetcher.canShareSession,
+                            @"Inappropriate shared session: %@", fetcher);
+
+    // There should already be a session, from this or a previous fetcher.
+    //
+    // Sanity check that the fetcher's session is the delegate's shared session.
+    NSURLSession *sharedSession = delegateDispatcher.session;
+    NSURLSession *fetcherSession = fetcher.session;
+    GTMSESSION_ASSERT_DEBUG(sharedSession != nil, @"Missing delegate session: %@", fetcher);
+    GTMSESSION_ASSERT_DEBUG(fetcherSession == sharedSession,
+                            @"Inconsistent session: %@ %@ (shared: %@)",
+                            fetcher, fetcherSession, sharedSession);
+
+    if (sharedSession != nil && fetcherSession == sharedSession) {
+      NSURLSessionTask *task = fetcher.sessionTask;
+      GTMSESSION_ASSERT_DEBUG(task != nil, @"Missing session task: %@", fetcher);
+
+      if (task) {
+        [delegateDispatcher setFetcher:fetcher
+                               forTask:task];
+      }
+    }
+  }
+}
+
+- (void)stopFetcher:(GTMSessionFetcher *)fetcher {
+  [fetcher stopFetching];
+}
+
+- (void)fetcherDidStop:(GTMSessionFetcher *)fetcher {
+  // Entry point from the fetcher
+  NSString *host = fetcher.serviceHost;
+  if (!host) {
+    // fetcher has been stopped previously
+    return;
+  }
+
+  // This removeFetcher: invocation is a fallback; typically, fetchers are removed from the task
+  // map when the task completes.
+  GTMSessionFetcherSessionDelegateDispatcher *delegateDispatcher =
+      [self delegateDispatcherForFetcher:fetcher];
+  [delegateDispatcher removeFetcher:fetcher];
+
+  NSMutableArray *fetchersToStart;
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    // If a test is waiting for all fetchers to stop, it needs to wait for this one
+    // to invoke its callbacks on the callback queue.
+    [_stoppedFetchersToWaitFor addObject:fetcher];
+
+    NSMutableArray *runningForHost = [_runningFetchersByHost objectForKey:host];
+    [runningForHost removeObject:fetcher];
+
+    NSMutableArray *delayedForHost = [_delayedFetchersByHost objectForKey:host];
+    [delayedForHost removeObject:fetcher];
+
+    while (delayedForHost.count > 0
+           && [[self class] numberOfNonBackgroundSessionFetchers:runningForHost]
+              < _maxRunningFetchersPerHost) {
+      // Start another delayed fetcher running, scanning for the minimum
+      // priority value, defaulting to FIFO for equal priorities
+      GTMSessionFetcher *nextFetcher = nil;
+      for (GTMSessionFetcher *delayedFetcher in delayedForHost) {
+        if (nextFetcher == nil
+            || delayedFetcher.servicePriority < nextFetcher.servicePriority) {
+          nextFetcher = delayedFetcher;
+        }
+      }
+
+      if (nextFetcher) {
+        [self addRunningFetcher:nextFetcher forHost:host];
+        runningForHost = [_runningFetchersByHost objectForKey:host];
+
+        [delayedForHost removeObjectIdenticalTo:nextFetcher];
+
+        if (!fetchersToStart) {
+          fetchersToStart = [NSMutableArray array];
+        }
+        [fetchersToStart addObject:nextFetcher];
+      }
+    }
+
+    if (runningForHost.count == 0) {
+      // None left; remove the empty array
+      [_runningFetchersByHost removeObjectForKey:host];
+    }
+
+    if (delayedForHost.count == 0) {
+      [_delayedFetchersByHost removeObjectForKey:host];
+    }
+  }  // @synchronized(self)
+
+  // Start fetchers outside of the synchronized block to avoid a deadlock.
+  for (GTMSessionFetcher *nextFetcher in fetchersToStart) {
+    [self startFetcher:nextFetcher];
+  }
+
+  // The fetcher is no longer in the running or the delayed array,
+  // so remove its host and thread properties
+  fetcher.serviceHost = nil;
+}
+
+- (NSUInteger)numberOfFetchers {
+  NSUInteger running = [self numberOfRunningFetchers];
+  NSUInteger delayed = [self numberOfDelayedFetchers];
+  return running + delayed;
+}
+
+- (NSUInteger)numberOfRunningFetchers {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    NSUInteger sum = 0;
+    for (NSString *host in _runningFetchersByHost) {
+      NSArray *fetchers = [_runningFetchersByHost objectForKey:host];
+      sum += fetchers.count;
+    }
+    return sum;
+  }
+}
+
+- (NSUInteger)numberOfDelayedFetchers {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    NSUInteger sum = 0;
+    for (NSString *host in _delayedFetchersByHost) {
+      NSArray *fetchers = [_delayedFetchersByHost objectForKey:host];
+      sum += fetchers.count;
+    }
+    return sum;
+  }
+}
+
+- (NSArray *)issuedFetchers {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    NSMutableArray *allFetchers = [NSMutableArray array];
+    void (^accumulateFetchers)(id, id, BOOL *) = ^(NSString *host,
+                                                   NSArray *fetchersForHost,
+                                                   BOOL *stop) {
+        [allFetchers addObjectsFromArray:fetchersForHost];
+    };
+    [_runningFetchersByHost enumerateKeysAndObjectsUsingBlock:accumulateFetchers];
+    [_delayedFetchersByHost enumerateKeysAndObjectsUsingBlock:accumulateFetchers];
+
+    GTMSESSION_ASSERT_DEBUG(allFetchers.count == [NSSet setWithArray:allFetchers].count,
+                            @"Fetcher appears multiple times\n running: %@\n delayed: %@",
+                            _runningFetchersByHost, _delayedFetchersByHost);
+
+    return allFetchers.count > 0 ? allFetchers : nil;
+  }
+}
+
+- (NSArray *)issuedFetchersWithRequestURL:(NSURL *)requestURL {
+  NSString *host = requestURL.host;
+  if (host.length == 0) return nil;
+
+  NSURL *targetURL = [requestURL absoluteURL];
+
+  NSArray *allFetchers = [self issuedFetchers];
+  NSIndexSet *indexes = [allFetchers indexesOfObjectsPassingTest:^BOOL(GTMSessionFetcher *fetcher,
+                                                                       NSUInteger idx,
+                                                                       BOOL *stop) {
+      NSURL *fetcherURL = [fetcher.request.URL absoluteURL];
+      return [fetcherURL isEqual:targetURL];
+  }];
+
+  NSArray *result = nil;
+  if (indexes.count > 0) {
+    result = [allFetchers objectsAtIndexes:indexes];
+  }
+  return result;
+}
+
+- (void)stopAllFetchers {
+  NSArray *delayedFetchersByHost;
+  NSArray *runningFetchersByHost;
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    // Set the time barrier so fetchers know not to call back even if
+    // the stop calls below occur after the fetchers naturally
+    // stopped and so were removed from _runningFetchersByHost,
+    // but while the callbacks were already enqueued before stopAllFetchers
+    // was invoked.
+    _stoppedAllFetchersDate = [[NSDate alloc] init];
+
+    // Remove fetchers from the delayed list to avoid fetcherDidStop: from
+    // starting more fetchers running as a side effect of stopping one
+    delayedFetchersByHost = _delayedFetchersByHost.allValues;
+    [_delayedFetchersByHost removeAllObjects];
+
+    runningFetchersByHost = _runningFetchersByHost.allValues;
+    [_runningFetchersByHost removeAllObjects];
+  }
+
+  for (NSArray *delayedForHost in delayedFetchersByHost) {
+    for (GTMSessionFetcher *fetcher in delayedForHost) {
+      [self stopFetcher:fetcher];
+    }
+  }
+
+  for (NSArray *runningForHost in runningFetchersByHost) {
+    for (GTMSessionFetcher *fetcher in runningForHost) {
+      [self stopFetcher:fetcher];
+    }
+  }
+}
+
+- (NSDate *)stoppedAllFetchersDate {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _stoppedAllFetchersDate;
+  }
+}
+
+#pragma mark Accessors
+
+- (BOOL)reuseSession {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _delegateDispatcher != nil;
+  }
+}
+
+- (void)setReuseSession:(BOOL)shouldReuse {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    BOOL wasReusing = (_delegateDispatcher != nil);
+    if (shouldReuse != wasReusing) {
+      [self abandonDispatcher];
+      if (shouldReuse) {
+        _delegateDispatcher =
+            [[GTMSessionFetcherSessionDelegateDispatcher alloc] initWithParentService:self
+                                                               sessionDiscardInterval:_unusedSessionTimeout];
+      } else {
+        _delegateDispatcher = nil;
+      }
+    }
+  }
+}
+
+- (void)resetSession {
+  GTMSessionCheckNotSynchronized(self);
+  dispatch_semaphore_wait(_sessionCreationSemaphore, DISPATCH_TIME_FOREVER);
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+    [self resetSessionInternal];
+  }
+
+  dispatch_semaphore_signal(_sessionCreationSemaphore);
+}
+
+- (void)resetSessionInternal {
+  GTMSessionCheckSynchronized(self);
+
+  // The old dispatchers may be retained as delegates of any ongoing sessions by those sessions.
+  if (_delegateDispatcher) {
+    [self abandonDispatcher];
+    _delegateDispatcher =
+        [[GTMSessionFetcherSessionDelegateDispatcher alloc] initWithParentService:self
+                                                           sessionDiscardInterval:_unusedSessionTimeout];
+  }
+}
+
+- (void)resetSessionForDispatcherDiscardTimer:(NSTimer *)timer {
+  GTMSessionCheckNotSynchronized(self);
+
+  dispatch_semaphore_wait(_sessionCreationSemaphore, DISPATCH_TIME_FOREVER);
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_delegateDispatcher.discardTimer == timer) {
+      // If the delegate dispatcher's current discardTimer is the same object as the timer
+      // that fired, no fetcher has recently attempted to start using the session by calling
+      // startSessionUsage, which invalidates and nils out the timer.
+      [self resetSessionInternal];
+    } else {
+      // A fetcher has invalidated the timer between its triggering and now, potentially
+      // meaning a fetcher has requested access to the NSURLSession, and may be in the process
+      // of starting a new task. The dispatcher should not be abandoned, as this can lead
+      // to a race condition between calling -finishTasksAndInvalidate on the NSURLSession
+      // and the fetcher attempting to create a new task.
+    }
+  }
+
+  dispatch_semaphore_signal(_sessionCreationSemaphore);
+}
+
+- (NSTimeInterval)unusedSessionTimeout {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _unusedSessionTimeout;
+  }
+}
+
+- (void)setUnusedSessionTimeout:(NSTimeInterval)timeout {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _unusedSessionTimeout = timeout;
+    _delegateDispatcher.discardInterval = timeout;
+  }
+}
+
+// This method should be called inside of @synchronized(self)
+- (void)abandonDispatcher {
+  GTMSessionCheckSynchronized(self);
+  [_delegateDispatcher abandon];
+}
+
+- (NSDictionary *)runningFetchersByHost {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return [_runningFetchersByHost copy];
+  }
+}
+
+- (void)setRunningFetchersByHost:(NSDictionary *)dict {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _runningFetchersByHost = [dict mutableCopy];
+  }
+}
+
+- (NSDictionary *)delayedFetchersByHost {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return [_delayedFetchersByHost copy];
+  }
+}
+
+- (void)setDelayedFetchersByHost:(NSDictionary *)dict {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _delayedFetchersByHost = [dict mutableCopy];
+  }
+}
+
+- (id<GTMFetcherAuthorizationProtocol>)authorizer {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _authorizer;
+  }
+}
+
+- (void)setAuthorizer:(id<GTMFetcherAuthorizationProtocol>)obj {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (obj != _authorizer) {
+      [self detachAuthorizer];
+    }
+
+    _authorizer = obj;
+  }
+
+  // Use the fetcher service for the authorization fetches if the auth
+  // object supports fetcher services
+  if ([obj respondsToSelector:@selector(setFetcherService:)]) {
+#if GTM_USE_SESSION_FETCHER
+    [obj setFetcherService:self];
+#else
+    [obj setFetcherService:(id)self];
+#endif
+  }
+}
+
+// This should be called inside a @synchronized(self) block except during dealloc.
+- (void)detachAuthorizer {
+  // This method is called by the fetcher service's dealloc and setAuthorizer:
+  // methods; do not override.
+  //
+  // The fetcher service retains the authorizer, and the authorizer has a
+  // weak pointer to the fetcher service (a non-zeroing pointer for
+  // compatibility with iOS 4 and Mac OS X 10.5/10.6.)
+  //
+  // When this fetcher service no longer uses the authorizer, we want to remove
+  // the authorizer's dependence on the fetcher service.  Authorizers can still
+  // function without a fetcher service.
+  if ([_authorizer respondsToSelector:@selector(fetcherService)]) {
+    id authFetcherService = [_authorizer fetcherService];
+    if (authFetcherService == self) {
+      [_authorizer setFetcherService:nil];
+    }
+  }
+}
+
+- (dispatch_queue_t GTM_NONNULL_TYPE)callbackQueue {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _callbackQueue;
+  }  // @synchronized(self)
+}
+
+- (void)setCallbackQueue:(dispatch_queue_t GTM_NULLABLE_TYPE)queue {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _callbackQueue = queue ?: dispatch_get_main_queue();
+  }  // @synchronized(self)
+}
+
+- (NSOperationQueue * GTM_NONNULL_TYPE)sessionDelegateQueue {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _delegateQueue;
+  }  // @synchronized(self)
+}
+
+- (void)setSessionDelegateQueue:(NSOperationQueue * GTM_NULLABLE_TYPE)queue {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _delegateQueue = queue ?: [NSOperationQueue mainQueue];
+  }  // @synchronized(self)
+}
+
+- (NSOperationQueue *)delegateQueue {
+  // Provided for compatibility with the old fetcher service.  The gtm-oauth2 code respects
+  // any custom delegate queue for calling the app.
+  return nil;
+}
+
++ (NSUInteger)numberOfNonBackgroundSessionFetchers:(NSArray *)fetchers {
+  NSUInteger sum = 0;
+  for (GTMSessionFetcher *fetcher in fetchers) {
+    if (!fetcher.usingBackgroundSession) {
+      ++sum;
+    }
+  }
+  return sum;
+}
+
+@end
+
+@implementation GTMSessionFetcherService (TestingSupport)
+
++ (instancetype)mockFetcherServiceWithFakedData:(NSData *)fakedDataOrNil
+                                     fakedError:(NSError *)fakedErrorOrNil {
+#if !GTM_DISABLE_FETCHER_TEST_BLOCK
+  NSURL *url = [NSURL URLWithString:@"http://example.invalid"];
+  NSHTTPURLResponse *fakedResponse =
+      [[NSHTTPURLResponse alloc] initWithURL:url
+                                  statusCode:(fakedErrorOrNil ? 500 : 200)
+                                 HTTPVersion:@"HTTP/1.1"
+                                headerFields:nil];
+  GTMSessionFetcherService *service = [[self alloc] init];
+  service.allowedInsecureSchemes = @[ @"http" ];
+  service.testBlock = ^(GTMSessionFetcher *fetcherToTest,
+                        GTMSessionFetcherTestResponse testResponse) {
+    testResponse(fakedResponse, fakedDataOrNil, fakedErrorOrNil);
+  };
+  return service;
+#else
+  GTMSESSION_ASSERT_DEBUG(0, @"Test blocks disabled");
+  return nil;
+#endif  // GTM_DISABLE_FETCHER_TEST_BLOCK
+}
+
+#pragma mark Synchronous Wait for Unit Testing
+
+- (BOOL)waitForCompletionOfAllFetchersWithTimeout:(NSTimeInterval)timeoutInSeconds {
+  NSDate *giveUpDate = [NSDate dateWithTimeIntervalSinceNow:timeoutInSeconds];
+  _stoppedFetchersToWaitFor = [NSMutableArray array];
+
+  BOOL shouldSpinRunLoop = [NSThread isMainThread];
+  const NSTimeInterval kSpinInterval = 0.001;
+  BOOL didTimeOut = NO;
+  while (([self numberOfFetchers] > 0 || _stoppedFetchersToWaitFor.count > 0)) {
+    didTimeOut = [giveUpDate timeIntervalSinceNow] < 0;
+    if (didTimeOut) break;
+
+    GTMSessionFetcher *stoppedFetcher = _stoppedFetchersToWaitFor.firstObject;
+    if (stoppedFetcher) {
+      [_stoppedFetchersToWaitFor removeObject:stoppedFetcher];
+      [stoppedFetcher waitForCompletionWithTimeout:10.0 * kSpinInterval];
+    }
+
+    if (shouldSpinRunLoop) {
+      NSDate *stopDate = [NSDate dateWithTimeIntervalSinceNow:kSpinInterval];
+      [[NSRunLoop currentRunLoop] runUntilDate:stopDate];
+    } else {
+      [NSThread sleepForTimeInterval:kSpinInterval];
+    }
+  }
+  _stoppedFetchersToWaitFor = nil;
+
+  return !didTimeOut;
+}
+
+@end
+
+@implementation GTMSessionFetcherService (BackwardsCompatibilityOnly)
+
+- (NSInteger)cookieStorageMethod {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _cookieStorageMethod;
+  }
+}
+
+- (void)setCookieStorageMethod:(NSInteger)cookieStorageMethod {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _cookieStorageMethod = cookieStorageMethod;
+  }
+}
+
+@end
+
+@implementation GTMSessionFetcherSessionDelegateDispatcher {
+  __weak GTMSessionFetcherService *_parentService;
+  NSURLSession *_session;
+
+  // The task map maps NSURLSessionTasks to GTMSessionFetchers
+  NSMutableDictionary *_taskToFetcherMap;
+  // The discard timer will invalidate sessions after the session's last task completes.
+  NSTimer *_discardTimer;
+  NSTimeInterval _discardInterval;
+}
+
+@synthesize discardInterval = _discardInterval,
+            session = _session;
+
+- (instancetype)init {
+  [self doesNotRecognizeSelector:_cmd];
+  return nil;
+}
+
+- (instancetype)initWithParentService:(GTMSessionFetcherService *)parentService
+               sessionDiscardInterval:(NSTimeInterval)discardInterval {
+  self = [super init];
+  if (self) {
+    _discardInterval = discardInterval;
+    _parentService = parentService;
+  }
+  return self;
+}
+
+- (NSString *)description {
+  return [NSString stringWithFormat:@"%@ %p %@ %@",
+          [self class], self,
+          _session ?: @"<no session>",
+          _taskToFetcherMap.count > 0 ? _taskToFetcherMap : @"<no tasks>"];
+}
+
+- (NSTimer *)discardTimer {
+  GTMSessionCheckNotSynchronized(self);
+  @synchronized(self) {
+    return _discardTimer;
+  }
+}
+
+// This method should be called inside of a @synchronized(self) block.
+- (void)startDiscardTimer {
+  GTMSessionCheckSynchronized(self);
+  [_discardTimer invalidate];
+  _discardTimer = nil;
+  if (_discardInterval > 0) {
+    _discardTimer = [NSTimer timerWithTimeInterval:_discardInterval
+                                            target:self
+                                          selector:@selector(discardTimerFired:)
+                                          userInfo:nil
+                                           repeats:NO];
+    [_discardTimer setTolerance:(_discardInterval / 10)];
+    [[NSRunLoop mainRunLoop] addTimer:_discardTimer forMode:NSRunLoopCommonModes];
+  }
+}
+
+// This method should be called inside of a @synchronized(self) block.
+- (void)destroyDiscardTimer {
+  GTMSessionCheckSynchronized(self);
+  [_discardTimer invalidate];
+  _discardTimer = nil;
+}
+
+- (void)discardTimerFired:(NSTimer *)timer {
+  GTMSessionFetcherService *service;
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    NSUInteger numberOfTasks = _taskToFetcherMap.count;
+    if (numberOfTasks == 0) {
+      service = _parentService;
+    }
+  }
+
+  // Inform the service that the discard timer has fired, and should check whether the
+  // service can abandon us. -resetSession cannot be called directly, as there is a
+  // race condition that must be guarded against with the NSURLSession being returned
+  // from sessionForFetcherCreation outside other locks. The service can take steps
+  // to prevent resetting the session if that has occurred.
+  //
+  // The service must be called from outside the @synchronized block.
+  [service resetSessionForDispatcherDiscardTimer:timer];
+}
+
+- (void)abandon {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    [self destroySessionAndTimer];
+  }
+}
+
+- (void)startSessionUsage {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    [self destroyDiscardTimer];
+  }
+}
+
+// This method should be called inside of a @synchronized(self) block.
+- (void)destroySessionAndTimer {
+  GTMSessionCheckSynchronized(self);
+  [self destroyDiscardTimer];
+
+  // Break any retain cycle from the session holding the delegate.
+  [_session finishTasksAndInvalidate];
+
+  // Immediately clear the session so no new task may be issued with it.
+  //
+  // The _taskToFetcherMap needs to stay valid until the outstanding tasks finish.
+  _session = nil;
+}
+
+- (void)setFetcher:(GTMSessionFetcher *)fetcher forTask:(NSURLSessionTask *)task {
+  GTMSESSION_ASSERT_DEBUG(fetcher != nil, @"missing fetcher");
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_taskToFetcherMap == nil) {
+      _taskToFetcherMap = [[NSMutableDictionary alloc] init];
+    }
+
+    if (fetcher) {
+      [_taskToFetcherMap setObject:fetcher forKey:task];
+      [self destroyDiscardTimer];
+    }
+  }
+}
+
+- (void)removeFetcher:(GTMSessionFetcher *)fetcher {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    // Typically, a fetcher should be removed when its task invokes
+    // URLSession:task:didCompleteWithError:.
+    //
+    // When fetching with a testBlock, though, the task completed delegate
+    // method may not be invoked, requiring cleanup here.
+    NSArray *tasks = [_taskToFetcherMap allKeysForObject:fetcher];
+    GTMSESSION_ASSERT_DEBUG(tasks.count <= 1, @"fetcher task not unmapped: %@", tasks);
+    [_taskToFetcherMap removeObjectsForKeys:tasks];
+
+    if (_taskToFetcherMap.count == 0) {
+      [self startDiscardTimer];
+    }
+  }
+}
+
+// This helper method provides synchronized access to the task map for the delegate
+// methods below.
+- (id)fetcherForTask:(NSURLSessionTask *)task {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return [_taskToFetcherMap objectForKey:task];
+  }
+}
+
+- (void)removeTaskFromMap:(NSURLSessionTask *)task {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    [_taskToFetcherMap removeObjectForKey:task];
+  }
+}
+
+- (void)setSession:(NSURLSession *)session {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _session = session;
+  }
+}
+
+- (NSURLSession *)session {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _session;
+  }
+}
+
+- (NSTimeInterval)discardInterval {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _discardInterval;
+  }
+}
+
+- (void)setDiscardInterval:(NSTimeInterval)interval {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _discardInterval = interval;
+  }
+}
+
+// NSURLSessionDelegate protocol methods.
+
+// - (void)URLSessionDidFinishEventsForBackgroundURLSession:(NSURLSession *)session;
+//
+// TODO(seh): How do we route this to an appropriate fetcher?
+
+
+- (void)URLSession:(NSURLSession *)session didBecomeInvalidWithError:(NSError *)error {
+  GTM_LOG_SESSION_DELEGATE(@"%@ %p URLSession:%@ didBecomeInvalidWithError:%@",
+                           [self class], self, session, error);
+  NSDictionary *localTaskToFetcherMap;
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _session = nil;
+
+    localTaskToFetcherMap = [_taskToFetcherMap copy];
+  }
+
+  // Any "suspended" tasks may not have received callbacks from NSURLSession when the session
+  // completes; we'll call them now.
+  [localTaskToFetcherMap enumerateKeysAndObjectsUsingBlock:^(NSURLSessionTask *task,
+                                                             GTMSessionFetcher *fetcher,
+                                                             BOOL *stop) {
+    if (fetcher.session == session) {
+        // Our delegate method URLSession:task:didCompleteWithError: will rely on
+        // _taskToFetcherMap so that should still contain this fetcher.
+        NSError *canceledError = [NSError errorWithDomain:NSURLErrorDomain
+                                                     code:NSURLErrorCancelled
+                                                 userInfo:nil];
+        [self URLSession:session task:task didCompleteWithError:canceledError];
+      } else {
+        GTMSESSION_ASSERT_DEBUG(0, @"Unexpected session in fetcher: %@ has %@ (expected %@)",
+                                fetcher, fetcher.session, session);
+      }
+  }];
+
+  // Our tests rely on this notification to know the session discard timer fired.
+  NSDictionary *userInfo = @{ kGTMSessionFetcherServiceSessionKey : session };
+  NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
+  [nc postNotificationName:kGTMSessionFetcherServiceSessionBecameInvalidNotification
+                    object:_parentService
+                  userInfo:userInfo];
+}
+
+
+#pragma mark - NSURLSessionTaskDelegate
+
+// NSURLSessionTaskDelegate protocol methods.
+//
+// We won't test here if the fetcher responds to these since we only want this
+// class to implement the same delegate methods the fetcher does (so NSURLSession's
+// tests for respondsToSelector: will have the same result whether the session
+// delegate is the fetcher or this dispatcher.)
+
+- (void)URLSession:(NSURLSession *)session
+              task:(NSURLSessionTask *)task
+willPerformHTTPRedirection:(NSHTTPURLResponse *)response
+        newRequest:(NSURLRequest *)request
+ completionHandler:(void (^)(NSURLRequest *))completionHandler {
+  id<NSURLSessionTaskDelegate> fetcher = [self fetcherForTask:task];
+  [fetcher URLSession:session
+                 task:task
+willPerformHTTPRedirection:response
+           newRequest:request
+    completionHandler:completionHandler];
+}
+
+- (void)URLSession:(NSURLSession *)session
+              task:(NSURLSessionTask *)task
+didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge
+ completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition, NSURLCredential *))handler {
+  id<NSURLSessionTaskDelegate> fetcher = [self fetcherForTask:task];
+  [fetcher URLSession:session
+                 task:task
+  didReceiveChallenge:challenge
+    completionHandler:handler];
+}
+
+- (void)URLSession:(NSURLSession *)session
+              task:(NSURLSessionTask *)task
+ needNewBodyStream:(void (^)(NSInputStream *bodyStream))handler {
+  id<NSURLSessionTaskDelegate> fetcher = [self fetcherForTask:task];
+  [fetcher URLSession:session
+                 task:task
+    needNewBodyStream:handler];
+}
+
+- (void)URLSession:(NSURLSession *)session
+              task:(NSURLSessionTask *)task
+   didSendBodyData:(int64_t)bytesSent
+    totalBytesSent:(int64_t)totalBytesSent
+totalBytesExpectedToSend:(int64_t)totalBytesExpectedToSend {
+  id<NSURLSessionTaskDelegate> fetcher = [self fetcherForTask:task];
+  [fetcher URLSession:session
+                 task:task
+      didSendBodyData:bytesSent
+       totalBytesSent:totalBytesSent
+totalBytesExpectedToSend:totalBytesExpectedToSend];
+}
+
+- (void)URLSession:(NSURLSession *)session
+              task:(NSURLSessionTask *)task
+didCompleteWithError:(NSError *)error {
+  id<NSURLSessionTaskDelegate> fetcher = [self fetcherForTask:task];
+
+  // This is the usual way tasks are removed from the task map.
+  [self removeTaskFromMap:task];
+
+  [fetcher URLSession:session
+                 task:task
+ didCompleteWithError:error];
+}
+
+// NSURLSessionDataDelegate protocol methods.
+
+- (void)URLSession:(NSURLSession *)session
+          dataTask:(NSURLSessionDataTask *)dataTask
+didReceiveResponse:(NSURLResponse *)response
+ completionHandler:(void (^)(NSURLSessionResponseDisposition))handler {
+  id<NSURLSessionDataDelegate> fetcher = [self fetcherForTask:dataTask];
+  [fetcher URLSession:session
+             dataTask:dataTask
+   didReceiveResponse:response
+    completionHandler:handler];
+}
+
+- (void)URLSession:(NSURLSession *)session
+          dataTask:(NSURLSessionDataTask *)dataTask
+didBecomeDownloadTask:(NSURLSessionDownloadTask *)downloadTask {
+  id<NSURLSessionDataDelegate> fetcher = [self fetcherForTask:dataTask];
+  GTMSESSION_ASSERT_DEBUG(fetcher != nil, @"Missing fetcher for %@", dataTask);
+  [self removeTaskFromMap:dataTask];
+  if (fetcher) {
+    GTMSESSION_ASSERT_DEBUG([fetcher isKindOfClass:[GTMSessionFetcher class]],
+                            @"Expecting GTMSessionFetcher");
+    [self setFetcher:(GTMSessionFetcher *)fetcher forTask:downloadTask];
+  }
+
+  [fetcher URLSession:session
+             dataTask:dataTask
+didBecomeDownloadTask:downloadTask];
+}
+
+- (void)URLSession:(NSURLSession *)session
+          dataTask:(NSURLSessionDataTask *)dataTask
+    didReceiveData:(NSData *)data {
+  id<NSURLSessionDataDelegate> fetcher = [self fetcherForTask:dataTask];
+  [fetcher URLSession:session
+             dataTask:dataTask
+       didReceiveData:data];
+}
+
+- (void)URLSession:(NSURLSession *)session
+          dataTask:(NSURLSessionDataTask *)dataTask
+ willCacheResponse:(NSCachedURLResponse *)proposedResponse
+ completionHandler:(void (^)(NSCachedURLResponse *))handler {
+  id<NSURLSessionDataDelegate> fetcher = [self fetcherForTask:dataTask];
+  [fetcher URLSession:session
+             dataTask:dataTask
+    willCacheResponse:proposedResponse
+    completionHandler:handler];
+}
+
+// NSURLSessionDownloadDelegate protocol methods.
+
+- (void)URLSession:(NSURLSession *)session
+      downloadTask:(NSURLSessionDownloadTask *)downloadTask
+didFinishDownloadingToURL:(NSURL *)location {
+  id<NSURLSessionDownloadDelegate> fetcher = [self fetcherForTask:downloadTask];
+  [fetcher URLSession:session
+         downloadTask:downloadTask
+didFinishDownloadingToURL:location];
+}
+
+- (void)URLSession:(NSURLSession *)session
+      downloadTask:(NSURLSessionDownloadTask *)downloadTask
+      didWriteData:(int64_t)bytesWritten
+ totalBytesWritten:(int64_t)totalWritten
+totalBytesExpectedToWrite:(int64_t)totalExpected {
+  id<NSURLSessionDownloadDelegate> fetcher = [self fetcherForTask:downloadTask];
+  [fetcher URLSession:session
+         downloadTask:downloadTask
+         didWriteData:bytesWritten
+    totalBytesWritten:totalWritten
+totalBytesExpectedToWrite:totalExpected];
+}
+
+- (void)URLSession:(NSURLSession *)session
+      downloadTask:(NSURLSessionDownloadTask *)downloadTask
+ didResumeAtOffset:(int64_t)fileOffset
+expectedTotalBytes:(int64_t)expectedTotalBytes {
+  id<NSURLSessionDownloadDelegate> fetcher = [self fetcherForTask:downloadTask];
+  [fetcher URLSession:session
+         downloadTask:downloadTask
+    didResumeAtOffset:fileOffset
+   expectedTotalBytes:expectedTotalBytes];
+}
+
+@end
diff --git a/Example/Pods/GTMSessionFetcher/Source/GTMSessionUploadFetcher.h b/Example/Pods/GTMSessionFetcher/Source/GTMSessionUploadFetcher.h
new file mode 100644
index 0000000..51372f2
--- /dev/null
+++ b/Example/Pods/GTMSessionFetcher/Source/GTMSessionUploadFetcher.h
@@ -0,0 +1,128 @@
+/* Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// GTMSessionUploadFetcher implements Google's resumable upload protocol.
+
+//
+// This subclass of GTMSessionFetcher simulates the series of fetches
+// needed for chunked upload as a single fetch operation.
+//
+// Protocol document:  TBD
+//
+// To the client, the only fetcher that exists is this class; the subsidiary
+// fetchers needed for uploading chunks are not visible (though the most recent
+// chunk fetcher may be accessed via the -activeFetcher or -chunkFetcher methods, and
+// -responseHeaders and -statusCode reflect results from the most recent chunk
+// fetcher.)
+//
+// Chunk fetchers are discarded as soon as they have completed.
+//
+
+// Note: Unlike the fetcher superclass, the methods of GTMSessionUploadFetcher should
+// only be used from the main thread until further work is done to make this subclass
+// thread-safe.
+
+#import "GTMSessionFetcher.h"
+#import "GTMSessionFetcherService.h"
+
+GTM_ASSUME_NONNULL_BEGIN
+
+// Unless an application knows it needs a smaller chunk size, it should use the standard
+// chunk size, which sends the entire file as a single chunk to minimize upload overhead.
+extern int64_t const kGTMSessionUploadFetcherStandardChunkSize;
+
+// When uploading requires data buffer allocations (such as uploading from an NSData or
+// an NSFileHandle) this is the maximum buffer size that will be created by the fetcher.
+extern int64_t const kGTMSessionUploadFetcherMaximumDemandBufferSize;
+
+// Notification that the upload location URL was provided by the server.
+extern NSString *const kGTMSessionFetcherUploadLocationObtainedNotification;
+
+// Block to provide data during uploads.
+//
+// Response data may be allocated with dataWithBytesNoCopy:length:freeWhenDone: for efficiency,
+// and released after the response block returns.
+//
+// Pass nil as the data (and optionally an NSError) for a failure.
+typedef void (^GTMSessionUploadFetcherDataProviderResponse)(NSData * GTM_NULLABLE_TYPE data,
+                                                            NSError * GTM_NULLABLE_TYPE error);
+typedef void (^GTMSessionUploadFetcherDataProvider)(int64_t offset, int64_t length,
+    GTMSessionUploadFetcherDataProviderResponse response);
+
+@interface GTMSessionUploadFetcher : GTMSessionFetcher
+
+// Create an upload fetcher specifying either the request or the resume location URL,
+// then set an upload data source using one of these:
+//
+//   setUploadFileURL:
+//   setUploadDataLength:provider:
+//   setUploadFileHandle:
+//   setUploadData:
+
++ (instancetype)uploadFetcherWithRequest:(NSURLRequest *)request
+                          uploadMIMEType:(NSString *)uploadMIMEType
+                               chunkSize:(int64_t)chunkSize
+                          fetcherService:(GTM_NULLABLE GTMSessionFetcherService *)fetcherServiceOrNil;
+
++ (instancetype)uploadFetcherWithLocation:(NSURL * GTM_NULLABLE_TYPE)uploadLocationURL
+                           uploadMIMEType:(NSString *)uploadMIMEType
+                                chunkSize:(int64_t)chunkSize
+                           fetcherService:(GTM_NULLABLE GTMSessionFetcherService *)fetcherServiceOrNil;
+
+- (void)setUploadDataLength:(int64_t)fullLength
+                   provider:(GTM_NULLABLE GTMSessionUploadFetcherDataProvider)block;
+
++ (NSArray *)uploadFetchersForBackgroundSessions;
++ (GTM_NULLABLE instancetype)uploadFetcherForSessionIdentifier:(NSString *)sessionIdentifier;
+
+- (void)pauseFetching;
+- (void)resumeFetching;
+- (BOOL)isPaused;
+
+@property(atomic, strong, GTM_NULLABLE) NSURL *uploadLocationURL;
+@property(atomic, strong, GTM_NULLABLE) NSData *uploadData;
+@property(atomic, strong, GTM_NULLABLE) NSURL *uploadFileURL;
+@property(atomic, strong, GTM_NULLABLE) NSFileHandle *uploadFileHandle;
+@property(atomic, copy, readonly, GTM_NULLABLE) GTMSessionUploadFetcherDataProvider uploadDataProvider;
+@property(atomic, copy) NSString *uploadMIMEType;
+@property(atomic, assign) int64_t chunkSize;
+@property(atomic, readonly, assign) int64_t currentOffset;
+
+// The fetcher for the current data chunk, if any
+@property(atomic, strong, GTM_NULLABLE) GTMSessionFetcher *chunkFetcher;
+
+// The active fetcher is the current chunk fetcher, or the upload fetcher itself
+// if no chunk fetcher has yet been created.
+@property(atomic, readonly) GTMSessionFetcher *activeFetcher;
+
+// The last request made by an active fetcher.  Useful for testing.
+@property(atomic, readonly, GTM_NULLABLE) NSURLRequest *lastChunkRequest;
+
+// The status code from the most recently-completed fetch.
+@property(atomic, assign) NSInteger statusCode;
+
+// Exposed for testing only.
+@property(atomic, readonly, GTM_NULLABLE) dispatch_queue_t delegateCallbackQueue;
+@property(atomic, readonly, GTM_NULLABLE) GTMSessionFetcherCompletionHandler delegateCompletionHandler;
+
+@end
+
+@interface GTMSessionFetcher (GTMSessionUploadFetcherMethods)
+
+@property(readonly, GTM_NULLABLE) GTMSessionUploadFetcher *parentUploadFetcher;
+
+@end
+
+GTM_ASSUME_NONNULL_END
diff --git a/Example/Pods/GTMSessionFetcher/Source/GTMSessionUploadFetcher.m b/Example/Pods/GTMSessionFetcher/Source/GTMSessionUploadFetcher.m
new file mode 100644
index 0000000..3c71fd9
--- /dev/null
+++ b/Example/Pods/GTMSessionFetcher/Source/GTMSessionUploadFetcher.m
@@ -0,0 +1,1798 @@
+/* Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+#import "GTMSessionUploadFetcher.h"
+
+static NSString *const kGTMSessionIdentifierIsUploadChunkFetcherMetadataKey = @"_upChunk";
+static NSString *const kGTMSessionIdentifierUploadFileURLMetadataKey        = @"_upFileURL";
+static NSString *const kGTMSessionIdentifierUploadFileLengthMetadataKey     = @"_upFileLen";
+static NSString *const kGTMSessionIdentifierUploadLocationURLMetadataKey    = @"_upLocURL";
+static NSString *const kGTMSessionIdentifierUploadMIMETypeMetadataKey       = @"_uploadMIME";
+static NSString *const kGTMSessionIdentifierUploadChunkSizeMetadataKey      = @"_upChSize";
+static NSString *const kGTMSessionIdentifierUploadCurrentOffsetMetadataKey  = @"_upOffset";
+
+static NSString *const kGTMSessionHeaderXGoogUploadChunkGranularity = @"X-Goog-Upload-Chunk-Granularity";
+static NSString *const kGTMSessionHeaderXGoogUploadCommand          = @"X-Goog-Upload-Command";
+static NSString *const kGTMSessionHeaderXGoogUploadContentLength    = @"X-Goog-Upload-Content-Length";
+static NSString *const kGTMSessionHeaderXGoogUploadContentType      = @"X-Goog-Upload-Content-Type";
+static NSString *const kGTMSessionHeaderXGoogUploadOffset           = @"X-Goog-Upload-Offset";
+static NSString *const kGTMSessionHeaderXGoogUploadProtocol         = @"X-Goog-Upload-Protocol";
+static NSString *const kGTMSessionHeaderXGoogUploadSizeReceived     = @"X-Goog-Upload-Size-Received";
+static NSString *const kGTMSessionHeaderXGoogUploadStatus           = @"X-Goog-Upload-Status";
+static NSString *const kGTMSessionHeaderXGoogUploadURL              = @"X-Goog-Upload-URL";
+
+// Property of chunk fetchers identifying the parent upload fetcher.  Non-retained NSValue.
+static NSString *const kGTMSessionUploadFetcherChunkParentKey = @"_uploadFetcherChunkParent";
+
+int64_t const kGTMSessionUploadFetcherStandardChunkSize = (int64_t)LLONG_MAX;
+
+#if TARGET_OS_IPHONE
+int64_t const kGTMSessionUploadFetcherMaximumDemandBufferSize = 10 * 1024 * 1024;  // 10 MB for iOS
+#else
+int64_t const kGTMSessionUploadFetcherMaximumDemandBufferSize = 100 * 1024 * 1024;  // 100 MB for OS X
+#endif
+
+typedef NS_ENUM(NSUInteger, GTMSessionUploadFetcherStatus) {
+  kStatusUnknown,
+  kStatusActive,
+  kStatusFinal,
+  kStatusCancelled,
+};
+
+NSString *const kGTMSessionFetcherUploadLocationObtainedNotification =
+    @"kGTMSessionFetcherUploadLocationObtainedNotification";
+
+#if !GTMSESSION_BUILD_COMBINED_SOURCES
+@interface GTMSessionFetcher (ProtectedMethods)
+
+// Access to non-public method on the parent fetcher class.
+- (void)stopFetchReleasingCallbacks:(BOOL)shouldReleaseCallbacks;
+- (void)createSessionIdentifierWithMetadata:(NSDictionary *)metadata;
+- (GTMSessionFetcherCompletionHandler)completionHandlerWithTarget:(id)target
+                                                didFinishSelector:(SEL)finishedSelector;
+- (void)invokeOnCallbackQueue:(dispatch_queue_t)callbackQueue
+             afterUserStopped:(BOOL)afterStopped
+                        block:(void (^)(void))block;
+- (NSTimer *)retryTimer;
+
+@property(readwrite, strong) NSData *downloadedData;
+- (void)releaseCallbacks;
+
+- (NSInteger)statusCodeUnsynchronized;
+
+@end
+#endif  // !GTMSESSION_BUILD_COMBINED_SOURCES
+
+@interface GTMSessionUploadFetcher ()
+
+// Changing readonly to readwrite.
+@property(atomic, strong, readwrite) NSURLRequest *lastChunkRequest;
+@property(atomic, readwrite, assign) int64_t currentOffset;
+
+// Internal properties.
+@property(strong, atomic, GTM_NULLABLE) GTMSessionFetcher *fetcherInFlight;  // Synchronized on self.
+
+@property(assign, atomic, getter=isSubdataGenerating) BOOL subdataGenerating;
+@property(assign, atomic) BOOL shouldInitiateOffsetQuery;
+@property(assign, atomic) int64_t uploadGranularity;
+
+@end
+
+@implementation GTMSessionUploadFetcher {
+  GTMSessionFetcher *_chunkFetcher;
+
+  // We'll call through to the delegate's completion handler.
+  GTMSessionFetcherCompletionHandler _delegateCompletionHandler;
+  dispatch_queue_t _delegateCallbackQueue;
+
+  // The initial fetch's body length and bytes actually sent are
+  // needed for calculating progress during subsequent chunk uploads
+  int64_t _initialBodyLength;
+  int64_t _initialBodySent;
+
+  // The upload server address for the chunks of this upload session.
+  NSURL *_uploadLocationURL;
+
+  // _uploadData, _uploadDataProvider, or _uploadFileHandle may be set, but only one.
+  NSData *_uploadData;
+  NSFileHandle *_uploadFileHandle;
+  GTMSessionUploadFetcherDataProvider _uploadDataProvider;
+  NSURL *_uploadFileURL;
+  int64_t _uploadFileLength;
+  NSString *_uploadMIMEType;
+  int64_t _chunkSize;
+  int64_t _uploadGranularity;
+  BOOL _isPaused;
+  BOOL _isRestartedUpload;
+  BOOL _shouldInitiateOffsetQuery;
+
+  // Tied to useBackgroundSession property, since this property is applicable to chunk fetchers.
+  BOOL _useBackgroundSessionOnChunkFetchers;
+
+  // We keep the latest offset into the upload data just for progress reporting.
+  int64_t _currentOffset;
+
+  NSDictionary *_recentChunkReponseHeaders;
+  NSInteger _recentChunkStatusCode;
+
+  // For waiting, we need to know the fetcher in flight, if any, and if subdata generation
+  // is in progress.
+  GTMSessionFetcher *_fetcherInFlight;
+  BOOL _isSubdataGenerating;
+}
+
++ (void)load {
+  [self uploadFetchersForBackgroundSessions];
+}
+
++ (instancetype)uploadFetcherWithRequest:(NSURLRequest *)request
+                          uploadMIMEType:(NSString *)uploadMIMEType
+                               chunkSize:(int64_t)chunkSize
+                          fetcherService:(GTMSessionFetcherService *)fetcherService {
+  GTMSessionUploadFetcher *fetcher = [self uploadFetcherWithRequest:request
+                                                     fetcherService:fetcherService];
+  [fetcher setLocationURL:nil
+           uploadMIMEType:uploadMIMEType
+                chunkSize:chunkSize];
+  return fetcher;
+}
+
++ (instancetype)uploadFetcherWithLocation:(NSURL * GTM_NULLABLE_TYPE)uploadLocationURL
+                           uploadMIMEType:(NSString *)uploadMIMEType
+                                chunkSize:(int64_t)chunkSize
+                           fetcherService:(GTMSessionFetcherService *)fetcherService {
+  GTMSessionUploadFetcher *fetcher = [self uploadFetcherWithRequest:nil
+                                                     fetcherService:fetcherService];
+  [fetcher setLocationURL:uploadLocationURL
+           uploadMIMEType:uploadMIMEType
+                chunkSize:chunkSize];
+  return fetcher;
+}
+
++ (instancetype)uploadFetcherForSessionIdentifierMetadata:(NSDictionary *)metadata {
+  GTMSESSION_ASSERT_DEBUG(
+      [metadata[kGTMSessionIdentifierIsUploadChunkFetcherMetadataKey] boolValue],
+      @"Session identifier metadata is not for an upload fetcher: %@", metadata);
+
+  NSNumber *uploadFileLengthNum = metadata[kGTMSessionIdentifierUploadFileLengthMetadataKey];
+  GTMSESSION_ASSERT_DEBUG(uploadFileLengthNum != nil,
+                          @"Session metadata missing an UploadFileSize");
+  if (uploadFileLengthNum == nil) return nil;
+
+  int64_t uploadFileLength = [uploadFileLengthNum longLongValue];
+  GTMSESSION_ASSERT_DEBUG(uploadFileLength >= 0, @"Session metadata UploadFileSize is unknown");
+
+  NSString *uploadFileURLString = metadata[kGTMSessionIdentifierUploadFileURLMetadataKey];
+  GTMSESSION_ASSERT_DEBUG(uploadFileURLString, @"Session metadata missing an UploadFileURL");
+  if (uploadFileURLString == nil) return nil;
+
+  NSURL *uploadFileURL = [NSURL URLWithString:uploadFileURLString];
+  // There used to be a call here to NSURL checkResourceIsReachableAndReturnError: to check for the
+  // existence of the file (also tried NSFileManager fileExistsAtPath:). We've determined
+  // empirically that the check can fail at startup even when the upload file does in fact exist.
+  // For now, we'll go ahead and restore the background upload fetcher. If the file doesn't exist,
+  // it will fail later.
+
+  NSString *uploadLocationURLString = metadata[kGTMSessionIdentifierUploadLocationURLMetadataKey];
+  NSURL *uploadLocationURL =
+      uploadLocationURLString ? [NSURL URLWithString:uploadLocationURLString] : nil;
+
+  NSString *uploadMIMEType =
+      metadata[kGTMSessionIdentifierUploadMIMETypeMetadataKey];
+  int64_t uploadChunkSize =
+      [metadata[kGTMSessionIdentifierUploadChunkSizeMetadataKey] longLongValue];
+  if (uploadChunkSize <= 0) {
+    uploadChunkSize = kGTMSessionUploadFetcherStandardChunkSize;
+  }
+  int64_t currentOffset =
+      [metadata[kGTMSessionIdentifierUploadCurrentOffsetMetadataKey] longLongValue];
+  GTMSESSION_ASSERT_DEBUG(currentOffset <= uploadFileLength,
+                          @"CurrentOffset (%lld) exceeds UploadFileSize (%lld)",
+                          currentOffset, uploadFileLength);
+  if (currentOffset > uploadFileLength) return nil;
+
+  GTMSessionUploadFetcher *uploadFetcher = [self uploadFetcherWithLocation:uploadLocationURL
+                                                            uploadMIMEType:uploadMIMEType
+                                                                 chunkSize:uploadChunkSize
+                                                            fetcherService:nil];
+  // Set the upload file length before setting the upload file URL tries to determine the length.
+  [uploadFetcher setUploadFileLength:uploadFileLength];
+
+  uploadFetcher.uploadFileURL = uploadFileURL;
+  uploadFetcher.sessionUserInfo = metadata;
+  uploadFetcher.useBackgroundSession = YES;
+  uploadFetcher.currentOffset = currentOffset;
+  uploadFetcher.allowedInsecureSchemes = @[ @"http" ];  // Allowed on restored upload fetcher.
+  return uploadFetcher;
+}
+
++ (instancetype)uploadFetcherWithRequest:(NSURLRequest *)request
+                          fetcherService:(GTMSessionFetcherService *)fetcherService {
+  // Internal utility method for instantiating fetchers
+  GTMSessionUploadFetcher *fetcher;
+  if ([fetcherService isKindOfClass:[GTMSessionFetcherService class]]) {
+    fetcher = [fetcherService fetcherWithRequest:request
+                                    fetcherClass:self];
+  } else {
+    fetcher = [self fetcherWithRequest:request];
+  }
+  fetcher.useBackgroundSession = YES;
+  return fetcher;
+}
+
++ (NSPointerArray *)uploadFetcherPointerArrayForBackgroundSessions {
+  static NSPointerArray *gUploadFetcherPointerArrayForBackgroundSessions = nil;
+
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    gUploadFetcherPointerArrayForBackgroundSessions = [NSPointerArray weakObjectsPointerArray];
+  });
+  return gUploadFetcherPointerArrayForBackgroundSessions;
+}
+
++ (instancetype)uploadFetcherForSessionIdentifier:(NSString *)sessionIdentifier {
+  GTMSESSION_ASSERT_DEBUG(sessionIdentifier != nil, @"Invalid session identifier");
+  NSArray *uploadFetchersForBackgroundSessions = [self uploadFetchersForBackgroundSessions];
+  for (GTMSessionUploadFetcher *uploadFetcher in uploadFetchersForBackgroundSessions) {
+    if ([uploadFetcher.chunkFetcher.sessionIdentifier isEqual:sessionIdentifier]) {
+      return uploadFetcher;
+    }
+  }
+  return nil;
+}
+
++ (NSArray *)uploadFetchersForBackgroundSessions {
+  // Collect the background session upload fetchers that are still in memory.
+  NSPointerArray *uploadFetcherPointerArray = [self uploadFetcherPointerArrayForBackgroundSessions];
+  [uploadFetcherPointerArray compact];
+  NSMutableSet *restoredSessionIdentifiers = [[NSMutableSet alloc] init];
+  NSMutableArray *uploadFetchers = [[NSMutableArray alloc] init];
+  for (GTMSessionUploadFetcher *uploadFetcher in uploadFetcherPointerArray) {
+    NSString *sessionIdentifier = uploadFetcher.chunkFetcher.sessionIdentifier;
+    if (sessionIdentifier) {
+      [restoredSessionIdentifiers addObject:sessionIdentifier];
+      [uploadFetchers addObject:uploadFetcher];
+    }
+  }
+
+  // The system may have other ongoing background upload sessions. Restore upload fetchers for those
+  // too.
+  NSArray *fetchers = [GTMSessionFetcher fetchersForBackgroundSessions];
+  for (GTMSessionFetcher *fetcher in fetchers) {
+    NSString *sessionIdentifier = fetcher.sessionIdentifier;
+    if (!sessionIdentifier || [restoredSessionIdentifiers containsObject:sessionIdentifier]) {
+      continue;
+    }
+    NSDictionary *sessionIdentifierMetadata = [fetcher sessionIdentifierMetadata];
+    if (sessionIdentifierMetadata == nil) {
+      continue;
+    }
+    if (![sessionIdentifierMetadata[kGTMSessionIdentifierIsUploadChunkFetcherMetadataKey] boolValue]) {
+      continue;
+    }
+    GTMSessionUploadFetcher *uploadFetcher =
+        [self uploadFetcherForSessionIdentifierMetadata:sessionIdentifierMetadata];
+    if (uploadFetcher == nil) {
+      // Something went wrong with this upload fetcher, so kill the restored chunk fetcher.
+      [fetcher stopFetching];
+      continue;
+    }
+    [uploadFetchers addObject:uploadFetcher];
+    uploadFetcher->_chunkFetcher = fetcher;
+    uploadFetcher->_fetcherInFlight = fetcher;
+    [uploadFetcher attachSendProgressBlockToChunkFetcher:fetcher];
+    fetcher.completionHandler =
+        [fetcher completionHandlerWithTarget:uploadFetcher
+                           didFinishSelector:@selector(chunkFetcher:finishedWithData:error:)];
+
+    GTMSESSION_LOG_DEBUG(@"%@ restoring upload fetcher %@ for chunk fetcher %@",
+                         [self class], uploadFetcher, fetcher);
+  }
+  return uploadFetchers;
+}
+
+- (void)setUploadData:(NSData *)data {
+  BOOL changed = NO;
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_uploadData != data) {
+      _uploadData = data;
+      changed = YES;
+    }
+  }
+  if (changed) {
+    [self setupRequestHeaders];
+  }
+}
+
+- (NSData *)uploadData {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _uploadData;
+  }
+}
+
+- (void)setUploadFileHandle:(NSFileHandle *)fh {
+  BOOL changed = NO;
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_uploadFileHandle != fh) {
+      _uploadFileHandle = fh;
+      changed = YES;
+    }
+  }
+  if (changed) {
+    [self setupRequestHeaders];
+  }
+}
+
+- (NSFileHandle *)uploadFileHandle {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _uploadFileHandle;
+  }
+}
+
+- (void)setUploadFileURL:(NSURL *)uploadURL {
+  BOOL changed = NO;
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_uploadFileURL != uploadURL) {
+      _uploadFileURL = uploadURL;
+      changed = YES;
+    }
+  }
+  if (changed) {
+    [self setupRequestHeaders];
+  }
+}
+
+- (NSURL *)uploadFileURL {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _uploadFileURL;
+  }
+}
+
+- (void)setUploadFileLength:(int64_t)fullLength {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _uploadFileLength = fullLength;
+  }
+}
+
+- (void)setUploadDataLength:(int64_t)fullLength
+                   provider:(GTMSessionUploadFetcherDataProvider)block {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _uploadDataProvider = [block copy];
+    _uploadFileLength = fullLength;
+  }
+  [self setupRequestHeaders];
+}
+
+- (GTMSessionUploadFetcherDataProvider)uploadDataProvider {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _uploadDataProvider;
+  }
+}
+
+
+- (void)setUploadMIMEType:(NSString *)uploadMIMEType {
+  GTMSESSION_ASSERT_DEBUG(0, @"TODO: disallow setUploadMIMEType by making declaration readonly");
+  // (and uploadMIMEType, chunksize, currentOffset)
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _uploadMIMEType = uploadMIMEType;
+  }
+}
+
+- (NSString *)uploadMIMEType {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _uploadMIMEType;
+  }
+}
+
+- (void)setChunkSize:(int64_t)chunkSize {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _chunkSize = chunkSize;
+  }
+}
+
+- (int64_t)chunkSize {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _chunkSize;
+  }
+}
+
+- (void)setupRequestHeaders {
+  GTMSessionCheckNotSynchronized(self);
+
+#if DEBUG
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    int hasData = (_uploadData != nil) ? 1 : 0;
+    int hasFileHandle = (_uploadFileHandle != nil) ? 1 : 0;
+    int hasFileURL = (_uploadFileURL != nil) ? 1 : 0;
+    int hasUploadDataProvider = (_uploadDataProvider != nil) ? 1 : 0;
+    int numberOfSources = hasData + hasFileHandle + hasFileURL + hasUploadDataProvider;
+    #pragma unused(numberOfSources)
+    GTMSESSION_ASSERT_DEBUG(numberOfSources == 1,
+                            @"Need just one upload source (%d)", numberOfSources);
+  }  // @synchronized(self)
+#endif
+
+  // Add our custom headers to the initial request indicating the data
+  // type and total size to be delivered later in the chunk requests.
+  NSMutableURLRequest *mutableRequest = [self.request mutableCopy];
+
+  GTMSESSION_ASSERT_DEBUG((mutableRequest == nil) != (_uploadLocationURL == nil),
+                          @"Request and location are mutually exclusive");
+  if (!mutableRequest) return;
+
+  NSNumber *lengthNum = @([self fullUploadLength]);
+  [mutableRequest setValue:@"resumable"
+        forHTTPHeaderField:kGTMSessionHeaderXGoogUploadProtocol];
+  [mutableRequest setValue:@"start"
+        forHTTPHeaderField:kGTMSessionHeaderXGoogUploadCommand];
+  [mutableRequest setValue:_uploadMIMEType
+        forHTTPHeaderField:kGTMSessionHeaderXGoogUploadContentType];
+  [mutableRequest setValue:lengthNum.stringValue
+        forHTTPHeaderField:kGTMSessionHeaderXGoogUploadContentLength];
+
+  NSString *method = mutableRequest.HTTPMethod;
+  if (method == nil || [method caseInsensitiveCompare:@"GET"] == NSOrderedSame) {
+    [mutableRequest setHTTPMethod:@"POST"];
+  }
+
+  // Ensure the user agent header identifies this to the upload server as a
+  // GTMSessionUploadFetcher client.  The /1 can be incremented in the unlikely circumstance
+  // we need to make a bug fix in the client that the server can recognize.
+  NSString *const kUserAgentStub = @"(GTMSUF/1)";
+  NSString *userAgent = [mutableRequest valueForHTTPHeaderField:@"User-Agent"];
+  if (userAgent == nil
+      || [userAgent rangeOfString:kUserAgentStub].location == NSNotFound) {
+    if (userAgent.length == 0) {
+      userAgent = GTMFetcherStandardUserAgentString(nil);
+    }
+    userAgent = [userAgent stringByAppendingFormat:@" %@", kUserAgentStub];
+    [mutableRequest setValue:userAgent forHTTPHeaderField:@"User-Agent"];
+  }
+  [self setRequest:mutableRequest];
+}
+
+- (void)setLocationURL:(NSURL * GTM_NULLABLE_TYPE)location
+        uploadMIMEType:(NSString *)uploadMIMEType
+             chunkSize:(int64_t)chunkSize {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    GTMSESSION_ASSERT_DEBUG(chunkSize > 0, @"chunk size is zero");
+
+    // When resuming an upload, set the known upload target URL.
+    _uploadLocationURL = location;
+
+    _uploadMIMEType = uploadMIMEType;
+    _chunkSize = chunkSize;
+
+    // Indicate that we've not yet determined the file handle's length
+    _uploadFileLength = -1;
+
+    // Indicate that we've not yet determined the upload fetcher status
+    _recentChunkStatusCode = -1;
+
+    // If this is restarting an upload begun by another fetcher,
+    // the location is specified but the request is nil
+    _isRestartedUpload = (location != nil);
+  }  // @synchronized(self)
+}
+
+- (int64_t)fullUploadLength {
+  int64_t result;
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_uploadData) {
+      result = (int64_t)_uploadData.length;
+    } else {
+      if (_uploadFileLength == -1) {
+        if (_uploadFileHandle) {
+          // First time through, seek to end to determine file length
+          _uploadFileLength = (int64_t)[_uploadFileHandle seekToEndOfFile];
+        } else if (_uploadDataProvider) {
+          // _uploadFileLength is set when the _uploadDataProvider is set.
+          GTMSESSION_ASSERT_DEBUG(_uploadFileLength >= 0, @"No uploadDataProvider length set");
+        } else {
+          NSNumber *filesizeNum;
+          NSError *valueError;
+          if ([_uploadFileURL getResourceValue:&filesizeNum
+                                        forKey:NSURLFileSizeKey
+                                         error:&valueError]) {
+            _uploadFileLength = filesizeNum.longLongValue;
+          } else {
+            GTMSESSION_ASSERT_DEBUG(NO, @"Cannot get file size: %@\n  %@",
+                                    valueError, _uploadFileURL.path);
+            _uploadFileLength = 0;
+          }
+        }
+      }
+      result = _uploadFileLength;
+    }
+  }  // @synchronized(self)
+  return result;
+}
+
+// Make a subdata of the upload data.
+- (void)generateChunkSubdataWithOffset:(int64_t)offset
+                                length:(int64_t)length
+                              response:(GTMSessionUploadFetcherDataProviderResponse)response {
+  GTMSessionUploadFetcherDataProvider uploadDataProvider = self.uploadDataProvider;
+  if (uploadDataProvider) {
+    uploadDataProvider(offset, length, response);
+    return;
+  }
+
+  NSData *uploadData = self.uploadData;
+  if (uploadData) {
+    // NSData provided.
+    NSData *resultData;
+    if (offset == 0 && length == (int64_t)uploadData.length) {
+      resultData = uploadData;
+    } else {
+      int64_t dataLength = (int64_t)uploadData.length;
+      // Ensure our range is valid.  b/18007814
+      if (offset + length > dataLength) {
+        NSString *errorMessage = [NSString stringWithFormat:
+                                  @"Range invalid for upload data.  offset: %lld\tlength: %lld\tdataLength: %lld",
+                                  offset, length, dataLength];
+        GTMSESSION_ASSERT_DEBUG(NO, @"%@", errorMessage);
+        response(nil, [self uploadChunkUnavailableErrorWithDescription:errorMessage]);
+        return;
+      }
+      NSRange range = NSMakeRange((NSUInteger)offset, (NSUInteger)length);
+      resultData = [uploadData subdataWithRange:range];
+    }
+    response(resultData, nil);
+    return;
+  }
+  NSURL *uploadFileURL = self.uploadFileURL;
+  if (uploadFileURL) {
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+      [self generateChunkSubdataFromFileURL:uploadFileURL
+                                     offset:offset
+                                     length:length
+                                   response:response];
+    });
+    return;
+  }
+  GTMSESSION_ASSERT_DEBUG(_uploadFileHandle, @"Unexpectedly missing upload data package");
+  NSFileHandle *uploadFileHandle = self.uploadFileHandle;
+  dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+    [self generateChunkSubdataFromFileHandle:uploadFileHandle
+                                      offset:offset
+                                      length:length
+                                    response:response];
+  });
+}
+
+- (void)generateChunkSubdataFromFileHandle:(NSFileHandle *)fileHandle
+                                    offset:(int64_t)offset
+                                    length:(int64_t)length
+                                  response:(GTMSessionUploadFetcherDataProviderResponse)response {
+  NSData *resultData;
+  NSError *error;
+  @try {
+    [fileHandle seekToFileOffset:(unsigned long long)offset];
+    resultData = [fileHandle readDataOfLength:(NSUInteger)length];
+  }
+  @catch (NSException *exception) {
+    GTMSESSION_ASSERT_DEBUG(NO, @"uploadFileHandle failed to read, %@", exception);
+    error = [self uploadChunkUnavailableErrorWithDescription:exception.description];
+  }
+  // The response always re-dispatches to the main thread, so we skip doing that here.
+  response(resultData, error);
+}
+
+- (void)generateChunkSubdataFromFileURL:(NSURL *)fileURL
+                                 offset:(int64_t)offset
+                                 length:(int64_t)length
+                               response:(GTMSessionUploadFetcherDataProviderResponse)response {
+  GTMSessionCheckNotSynchronized(self);
+
+  NSData *resultData;
+  NSError *error;
+  int64_t fullUploadLength = [self fullUploadLength];
+  NSData *mappedData =
+      [NSData dataWithContentsOfURL:fileURL
+                            options:NSDataReadingMappedAlways + NSDataReadingUncached
+                              error:&error];
+  if (!mappedData) {
+    // We could not create an NSData by memory-mapping the file.
+#if TARGET_IPHONE_SIMULATOR
+    // NSTemporaryDirectory() can differ in the simulator between app restarts,
+    // yet the contents for the new path remains unchanged, so try the latest temp path.
+    if ([error.domain isEqual:NSCocoaErrorDomain] && (error.code == NSFileReadNoSuchFileError)) {
+      NSString *filename = [fileURL lastPathComponent];
+      NSString *filePath = [NSTemporaryDirectory() stringByAppendingPathComponent:filename];
+      NSURL *newFileURL = [NSURL fileURLWithPath:filePath];
+      if (![newFileURL isEqual:fileURL]) {
+        [self generateChunkSubdataFromFileURL:newFileURL
+                                       offset:offset
+                                       length:length
+                                     response:response];
+        return;
+      }
+    }
+#endif
+
+    // If the file is just too large to create an NSData for, or if for some other reason we can't
+    // map it, create an NSFileHandle instead to read a subset into an NSData.
+#if DEBUG
+    NSNumber *fileSizeNum;
+    BOOL hasFileSize = [fileURL getResourceValue:&fileSizeNum forKey:NSURLFileSizeKey error:NULL];
+    GTMSESSION_LOG_DEBUG(@"Note: uploadFileURL is falling back to creating upload chunks by reading"
+                         @" an NSFileHandle since uploadFileURL failed to map the upload file,"
+                         @" file size %@, %@",
+                         hasFileSize ? fileSizeNum : @"unknown", error);
+#endif
+
+    NSFileHandle *fileHandle = [NSFileHandle fileHandleForReadingFromURL:fileURL
+                                                                   error:&error];
+    if (fileHandle != nil) {
+      [self generateChunkSubdataFromFileHandle:fileHandle
+                                        offset:offset
+                                        length:length
+                                      response:response];
+      return;
+    }
+    GTMSESSION_ASSERT_DEBUG(NO, @"uploadFileURL failed to read, %@", error);
+    // Fall through with the error.
+  } else {
+    // Successfully created an NSData by memory-mapping the file.
+    if (offset > 0 || length < fullUploadLength) {
+      NSRange range = NSMakeRange((NSUInteger)offset, (NSUInteger)length);
+      resultData = [mappedData subdataWithRange:range];
+    } else {
+      resultData = mappedData;
+    }
+  }
+  // The response always re-dispatches to the main thread, so we skip re-dispatching here.
+  response(resultData, error);
+}
+
+- (NSError *)uploadChunkUnavailableErrorWithDescription:(NSString *)description {
+  // The description in the userInfo is intended as a clue to programmers, not
+  // for client code to examine or rely on.
+  NSDictionary *userInfo = @{ @"description" : description };
+  return [NSError errorWithDomain:kGTMSessionFetcherErrorDomain
+                             code:GTMSessionFetcherErrorUploadChunkUnavailable
+                         userInfo:userInfo];
+}
+
+- (NSError *)prematureFailureErrorWithUserInfo:(NSDictionary *)userInfo {
+  // An error for if we get an unexpected status from the upload server or
+  // otherwise cannot continue.  This is an issue beyond the upload protocol;
+  // there's no way the client can do anything useful except give up.
+  NSError *error = [NSError errorWithDomain:kGTMSessionFetcherStatusDomain
+                                       code:501  // Not implemented
+                                   userInfo:userInfo];
+  return error;
+}
+
++ (GTMSessionUploadFetcherStatus)uploadStatusFromResponseHeaders:(NSDictionary *)responseHeaders {
+  NSString *statusString = [responseHeaders objectForKey:kGTMSessionHeaderXGoogUploadStatus];
+  if ([statusString isEqual:@"active"]) {
+    return kStatusActive;
+  }
+  if ([statusString isEqual:@"final"]) {
+    return kStatusFinal;
+  }
+  if ([statusString isEqual:@"cancelled"]) {
+    return kStatusCancelled;
+  }
+  return kStatusUnknown;
+}
+
+#pragma mark Method overrides affecting the initial fetch only
+
+- (void)setCompletionHandler:(GTMSessionFetcherCompletionHandler)handler {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _delegateCompletionHandler = handler;
+  }
+}
+
+- (void)setDelegateCallbackQueue:(dispatch_queue_t GTM_NULLABLE_TYPE)queue {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _delegateCallbackQueue = queue;
+  }
+}
+
+- (dispatch_queue_t GTM_NULLABLE_TYPE)delegateCallbackQueue {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _delegateCallbackQueue;
+  }
+}
+
+- (BOOL)isRestartedUpload {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _isRestartedUpload;
+  }
+}
+
+- (GTMSessionFetcher * GTM_NULLABLE_TYPE)chunkFetcher {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _chunkFetcher;
+  }
+}
+
+- (void)setChunkFetcher:(GTMSessionFetcher * GTM_NULLABLE_TYPE)fetcher {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _chunkFetcher = fetcher;
+  }
+}
+
+- (void)setFetcherInFlight:(GTMSessionFetcher * GTM_NULLABLE_TYPE)fetcher {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _fetcherInFlight = fetcher;
+  }
+}
+
+- (GTMSessionFetcher * GTM_NULLABLE_TYPE)fetcherInFlight {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _fetcherInFlight;
+  }
+}
+
+- (void)beginFetchWithCompletionHandler:(GTMSessionFetcherCompletionHandler)handler {
+  GTMSessionCheckNotSynchronized(self);
+
+  [self setInitialBodyLength:[self bodyLength]];
+
+  // We'll hold onto the superclass's callback queue so we can invoke the handler
+  // even after the superclass has released the queue and its callback handler, as
+  // happens during auth failure.
+  [self setDelegateCallbackQueue:self.callbackQueue];
+  self.completionHandler = handler;
+
+  if ([self isRestartedUpload]) {
+    // When restarting an upload, we know the destination location for chunk fetches,
+    // but we need to query to find the initial offset.
+    if (![self isPaused]) {
+      [self sendQueryForUploadOffsetWithFetcherProperties:self.properties];
+    }
+    return;
+  }
+  // We don't want to call into the client's completion block immediately
+  // after the finish of the initial connection (the delegate is called only
+  // when uploading finishes), so we substitute our own completion block to be
+  // called when the initial connection finishes
+  GTMSESSION_ASSERT_DEBUG(self.fetcherInFlight == nil, @"unexpected fetcher in flight: %@",
+                          self.fetcherInFlight);
+
+  self.fetcherInFlight = self;
+  [super beginFetchWithCompletionHandler:^(NSData *data, NSError *error) {
+    self.fetcherInFlight = nil;
+    // callback
+
+    BOOL hasTestBlock = (self.testBlock != nil);
+    if (![self isRestartedUpload] && !hasTestBlock) {
+      if (error == nil) {
+        [self beginChunkFetches];
+      } else {
+        if ([self retryTimer] == nil) {
+          [self invokeFinalCallbackWithData:nil
+                                      error:error
+                   shouldInvalidateLocation:YES];
+        }
+      }
+    } else {
+      // If there was no initial request, then this fetch is resuming some
+      // other uploadFetcher's initial request, and the superclass's connection
+      // is never used, so at this point we call the user's actual completion
+      // block.
+      if (!hasTestBlock) {
+        [self invokeFinalCallbackWithData:data
+                                    error:error
+                 shouldInvalidateLocation:YES];
+      } else {
+        // There was a test block, so we won't do chunk fetches, but we simulate obtaining
+        // the data to be uploaded from the upload data provider block or the file handle,
+        // and then call back.
+        [self generateChunkSubdataWithOffset:0
+                                      length:[self fullUploadLength]
+                                    response:^(NSData *generateData, NSError *generateError) {
+            [self invokeFinalCallbackWithData:data
+                                        error:error
+                     shouldInvalidateLocation:YES];
+        }];
+      }
+    }
+  }];
+}
+
+- (void)beginChunkFetches {
+  GTMSessionCheckNotSynchronized(self);
+
+#if DEBUG
+  // The initial response of the resumable upload protocol should have an
+  // empty body
+  //
+  // This assert typically happens because the upload create/edit link URL was
+  // not supplied with the request, and the server is thus expecting a non-
+  // resumable request/response.
+  if (self.downloadedData.length > 0) {
+    NSData *downloadedData = self.downloadedData;
+    NSString *str = [[NSString alloc] initWithData:downloadedData
+                                          encoding:NSUTF8StringEncoding];
+    #pragma unused(str)
+    GTMSESSION_ASSERT_DEBUG(NO, @"unexpected response data (uploading to the wrong URL?)\n%@", str);
+  }
+#endif
+
+  // We need to get the upload URL from the location header to continue.
+  NSDictionary *responseHeaders = [self responseHeaders];
+
+  [self retrieveUploadChunkGranularityFromResponseHeaders:responseHeaders];
+
+  GTMSessionUploadFetcherStatus uploadStatus =
+      [[self class] uploadStatusFromResponseHeaders:responseHeaders];
+  GTMSESSION_ASSERT_DEBUG(uploadStatus != kStatusUnknown,
+      @"beginChunkFetches has unexpected upload status for headers %@", responseHeaders);
+
+  BOOL isPrematureStop = (uploadStatus == kStatusFinal) || (uploadStatus == kStatusCancelled);
+
+  NSString *uploadLocationURLStr = [responseHeaders objectForKey:kGTMSessionHeaderXGoogUploadURL];
+  BOOL hasUploadLocation = (uploadLocationURLStr.length > 0);
+
+  if (isPrematureStop || !hasUploadLocation) {
+    GTMSESSION_ASSERT_DEBUG(NO, @"Premature failure: upload-status:\"%@\"  location:%@",
+        [responseHeaders objectForKey:kGTMSessionHeaderXGoogUploadStatus], uploadLocationURLStr);
+    // We cannot continue since we do not know the location to use
+    // as our upload destination.
+    NSDictionary *userInfo = nil;
+    NSData *downloadedData = self.downloadedData;
+    if (downloadedData.length > 0) {
+      userInfo = @{ kGTMSessionFetcherStatusDataKey : downloadedData };
+    }
+    NSError *failureError = [self prematureFailureErrorWithUserInfo:userInfo];
+    [self invokeFinalCallbackWithData:nil
+                                error:failureError
+             shouldInvalidateLocation:YES];
+    return;
+  }
+
+  self.uploadLocationURL = [NSURL URLWithString:uploadLocationURLStr];
+
+  NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
+  [nc postNotificationName:kGTMSessionFetcherUploadLocationObtainedNotification
+                    object:self];
+
+  // we've now sent all of the initial post body data, so we need to include
+  // its size in future progress indicator callbacks
+  [self setInitialBodySent:[self initialBodyLength]];
+
+  // just in case the user paused us during the initial fetch...
+  if (![self isPaused]) {
+    [self uploadNextChunkWithOffset:0];
+  }
+}
+
+- (void)URLSession:(NSURLSession *)session
+              task:(NSURLSessionTask *)task
+   didSendBodyData:(int64_t)bytesSent
+    totalBytesSent:(int64_t)totalBytesSent
+    totalBytesExpectedToSend:(int64_t)totalBytesExpectedToSend {
+  // Overrides the superclass.
+  [self invokeDelegateWithDidSendBytes:bytesSent
+                        totalBytesSent:totalBytesSent
+              totalBytesExpectedToSend:totalBytesExpectedToSend + [self fullUploadLength]];
+}
+
+- (BOOL)shouldReleaseCallbacksUponCompletion {
+  // Overrides the superclass.
+
+  // We don't want the superclass to release the delegate and callback
+  // blocks once the initial fetch has finished
+  //
+  // This is invoked for only successful completion of the connection;
+  // an error always will invoke and release the callbacks
+  return NO;
+}
+
+- (void)invokeFinalCallbackWithData:(NSData *)data
+                              error:(NSError *)error
+           shouldInvalidateLocation:(BOOL)shouldInvalidateLocation {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (shouldInvalidateLocation) {
+      _uploadLocationURL = nil;
+    }
+
+    dispatch_queue_t queue = _delegateCallbackQueue;
+    GTMSessionFetcherCompletionHandler handler = _delegateCompletionHandler;
+    if (queue && handler) {
+      [self invokeOnCallbackQueue:queue
+                 afterUserStopped:NO
+                            block:^{
+          handler(data, error);
+      }];
+    }
+  }  // @synchronized(self)
+
+  [self releaseUploadAndBaseCallbacks];
+}
+
+- (void)releaseUploadAndBaseCallbacks {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _delegateCallbackQueue = nil;
+    _delegateCompletionHandler = nil;
+    _uploadDataProvider = nil;
+  }
+
+  // Release the base class's callbacks, too, if needed.
+  [self releaseCallbacks];
+}
+
+- (void)stopFetchReleasingCallbacks:(BOOL)shouldReleaseCallbacks {
+  GTMSessionCheckNotSynchronized(self);
+
+  // Clear _fetcherInFlight when stopped. Moved from stopFetching, since that's a public method,
+  // where this method does the work. Fixes issue clearing value when retryBlock included.
+  GTMSessionFetcher *fetcherInFlight = self.fetcherInFlight;
+  if (fetcherInFlight == self) {
+    self.fetcherInFlight = nil;
+  }
+
+  [super stopFetchReleasingCallbacks:shouldReleaseCallbacks];
+
+  if (shouldReleaseCallbacks) {
+    [self releaseUploadAndBaseCallbacks];
+  }
+}
+
+#pragma mark Chunk fetching methods
+
+- (void)uploadNextChunkWithOffset:(int64_t)offset {
+  // use the properties in each chunk fetcher
+  NSDictionary *props = [self properties];
+
+  [self uploadNextChunkWithOffset:offset
+                fetcherProperties:props];
+}
+
+- (void)sendQueryForUploadOffsetWithFetcherProperties:(NSDictionary *)props {
+  GTMSessionFetcher *queryFetcher = [self uploadFetcherWithProperties:props
+                                                         isQueryFetch:YES];
+  queryFetcher.bodyData = [NSData data];
+
+  NSString *originalComment = self.comment;
+  [queryFetcher setCommentWithFormat:@"%@ (query offset)",
+   originalComment ? originalComment : @"upload"];
+
+  [queryFetcher setRequestValue:@"query" forHTTPHeaderField:kGTMSessionHeaderXGoogUploadCommand];
+
+  self.fetcherInFlight = queryFetcher;
+  [queryFetcher beginFetchWithDelegate:self
+                     didFinishSelector:@selector(queryFetcher:finishedWithData:error:)];
+}
+
+- (void)queryFetcher:(GTMSessionFetcher *)queryFetcher
+    finishedWithData:(NSData *)data
+               error:(NSError *)error {
+  self.fetcherInFlight = nil;
+
+  NSDictionary *responseHeaders = [queryFetcher responseHeaders];
+  NSString *sizeReceivedHeader;
+
+  GTMSessionUploadFetcherStatus uploadStatus =
+      [[self class] uploadStatusFromResponseHeaders:responseHeaders];
+  GTMSESSION_ASSERT_DEBUG(uploadStatus != kStatusUnknown || error != nil,
+      @"query fetcher completion has unexpected upload status for headers %@", responseHeaders);
+
+  if (error == nil) {
+    sizeReceivedHeader = [responseHeaders objectForKey:kGTMSessionHeaderXGoogUploadSizeReceived];
+
+    if (uploadStatus == kStatusCancelled ||
+        (uploadStatus == kStatusActive && sizeReceivedHeader == nil)) {
+      NSDictionary *userInfo = nil;
+      if (data.length > 0) {
+        userInfo = @{ kGTMSessionFetcherStatusDataKey : data };
+      }
+      error = [self prematureFailureErrorWithUserInfo:userInfo];
+    }
+  }
+
+  if (error == nil) {
+    int64_t offset = [sizeReceivedHeader longLongValue];
+    int64_t fullUploadLength = [self fullUploadLength];
+    if (offset >= fullUploadLength || uploadStatus == kStatusFinal) {
+      // Handle we're done
+      [self chunkFetcher:queryFetcher finishedWithData:data error:nil];
+    } else {
+      [self retrieveUploadChunkGranularityFromResponseHeaders:responseHeaders];
+      [self uploadNextChunkWithOffset:offset];
+    }
+  } else {
+    // Handle query error
+    [self chunkFetcher:queryFetcher finishedWithData:data error:error];
+  }
+}
+
+- (void)sendCancelUploadWithFetcherProperties:(NSDictionary *)props {
+  GTMSessionFetcher *cancelFetcher = [self uploadFetcherWithProperties:props
+                                                          isQueryFetch:YES];
+  cancelFetcher.bodyData = [NSData data];
+
+  NSString *originalComment = self.comment;
+  [cancelFetcher setCommentWithFormat:@"%@ (cancel)",
+      originalComment ? originalComment : @"upload"];
+
+  [cancelFetcher setRequestValue:@"cancel" forHTTPHeaderField:kGTMSessionHeaderXGoogUploadCommand];
+
+  self.fetcherInFlight = cancelFetcher;
+  [cancelFetcher beginFetchWithCompletionHandler:^(NSData *data, NSError *error) {
+      self.fetcherInFlight = nil;
+      if (error) {
+        GTMSESSION_LOG_DEBUG(@"cancelFetcher %@", error);
+      }
+  }];
+}
+
+- (void)uploadNextChunkWithOffset:(int64_t)offset
+                fetcherProperties:(NSDictionary *)props {
+  GTMSessionCheckNotSynchronized(self);
+
+  // Example chunk headers:
+  //  X-Goog-Upload-Command: upload, finalize
+  //  X-Goog-Upload-Offset: 0
+  //  Content-Length: 2000000
+  //  Content-Type: image/jpeg
+  //
+  //  {bytes 0-1999999}
+
+  // The chunk upload URL requires no authentication header.
+  GTMSessionFetcher *chunkFetcher = [self uploadFetcherWithProperties:props
+                                                         isQueryFetch:NO];
+  [self attachSendProgressBlockToChunkFetcher:chunkFetcher];
+
+  BOOL isUploadingFileURL = (self.uploadFileURL != nil);
+
+  // Upload another chunk, meeting server-required granularity.
+  int64_t chunkSize = self.chunkSize;
+
+  int64_t fullUploadLength = [self fullUploadLength];
+
+  BOOL isUploadingFullFile = (offset == 0 && chunkSize >= fullUploadLength);
+  if (!isUploadingFileURL || !isUploadingFullFile) {
+    // We're not uploading the entire file and given the file URL.  Since we'll be
+    // allocating a subdata block for a chunk, we need to bound it to something that
+    // won't blow the process's memory.
+    if (chunkSize > kGTMSessionUploadFetcherMaximumDemandBufferSize) {
+      chunkSize = kGTMSessionUploadFetcherMaximumDemandBufferSize;
+    }
+  }
+
+  int64_t granularity = self.uploadGranularity;
+  if (granularity > 0) {
+    if (chunkSize < granularity) {
+      chunkSize = granularity;
+    } else {
+      chunkSize = chunkSize - (chunkSize % granularity);
+    }
+  }
+
+  GTMSESSION_ASSERT_DEBUG(offset < fullUploadLength || fullUploadLength == 0,
+                          @"offset %lld exceeds data length %lld", offset, fullUploadLength);
+
+  if (granularity > 0) {
+    offset = offset - (offset % granularity);
+  }
+
+  // If the chunk size is bigger than the remaining data, or else
+  // it's close enough in size to the remaining data that we'd rather
+  // avoid having a whole extra http fetch for the leftover bit, then make
+  // this chunk size exactly match the remaining data size
+  NSString *command;
+  int64_t thisChunkSize = chunkSize;
+
+  BOOL isChunkTooBig = (thisChunkSize >= (fullUploadLength - offset));
+  BOOL isChunkAlmostBigEnough = (fullUploadLength - offset - 2500 < thisChunkSize);
+  BOOL isFinalChunk = isChunkTooBig || isChunkAlmostBigEnough;
+  if (isFinalChunk) {
+    thisChunkSize = fullUploadLength - offset;
+    if (thisChunkSize > 0) {
+      command = @"upload, finalize";
+    } else {
+      command = @"finalize";
+    }
+  } else {
+    command = @"upload";
+  }
+  NSString *lengthStr = @(thisChunkSize).stringValue;
+  NSString *offsetStr = @(offset).stringValue;
+
+  [chunkFetcher setRequestValue:command forHTTPHeaderField:kGTMSessionHeaderXGoogUploadCommand];
+  [chunkFetcher setRequestValue:lengthStr forHTTPHeaderField:@"Content-Length"];
+  [chunkFetcher setRequestValue:offsetStr forHTTPHeaderField:kGTMSessionHeaderXGoogUploadOffset];
+
+  // Append the range of bytes in this chunk to the fetcher comment.
+  NSString *baseComment = self.comment;
+  [chunkFetcher setCommentWithFormat:@"%@ (%lld-%lld)",
+   baseComment ? baseComment : @"upload", offset, MAX(0, offset + thisChunkSize - 1)];
+
+  // The chunk size may have changed, so determine again if we're uploading the full file.
+  isUploadingFullFile = (offset == 0 && thisChunkSize >= fullUploadLength);
+  if (isUploadingFullFile && isUploadingFileURL) {
+    // The data is the full upload file URL.
+    chunkFetcher.bodyFileURL = self.uploadFileURL;
+    [self beginChunkFetcher:chunkFetcher
+                     offset:offset];
+  } else {
+    // Make an NSData for the subset for this upload chunk.
+    self.subdataGenerating = YES;
+    [self generateChunkSubdataWithOffset:offset
+                                  length:thisChunkSize
+                                response:^(NSData *chunkData, NSError *chunkError) {
+      // The subdata methods may leave us on a background thread.
+      dispatch_async(dispatch_get_main_queue(), ^{
+        self.subdataGenerating = NO;
+        if (chunkData == nil) {
+          NSError *responseError = chunkError;
+          if (!responseError) {
+            responseError = [self uploadChunkUnavailableErrorWithDescription:@"chunkData is nil"];
+          }
+          [self invokeFinalCallbackWithData:nil
+                                      error:responseError
+                   shouldInvalidateLocation:YES];
+          return;
+        }
+
+        BOOL didWriteFile = NO;
+        if (isUploadingFileURL) {
+          // Make a temporary file with the data subset.
+          NSString *tempName =
+              [NSString stringWithFormat:@"GTMUpload_temp_%@", [[NSUUID UUID] UUIDString]];
+          NSString *tempPath = [NSTemporaryDirectory() stringByAppendingPathComponent:tempName];
+          NSError *writeError;
+          didWriteFile = [chunkData writeToFile:tempPath
+                                        options:NSDataWritingAtomic
+                                          error:&writeError];
+          if (didWriteFile) {
+            chunkFetcher.bodyFileURL = [NSURL fileURLWithPath:tempPath];
+          } else {
+            GTMSESSION_LOG_DEBUG(@"writeToFile failed: %@\n%@", writeError, tempPath);
+          }
+        }
+        if (!didWriteFile) {
+          chunkFetcher.bodyData = [chunkData copy];
+        }
+        [self beginChunkFetcher:chunkFetcher
+                         offset:offset];
+      });
+    }];
+  }
+}
+
+- (void)beginChunkFetcher:(GTMSessionFetcher *)chunkFetcher
+                   offset:(int64_t)offset {
+
+  // Track the current offset for progress reporting
+  self.currentOffset = offset;
+
+  // Hang on to the fetcher in case we need to cancel it.  We set these before beginning the
+  // chunk fetch so the observers notified of chunk fetches can inspect the upload fetcher to
+  // match to the chunk.
+  self.chunkFetcher = chunkFetcher;
+  self.fetcherInFlight = chunkFetcher;
+
+  // Update the last chunk request, including any request headers.
+  self.lastChunkRequest = chunkFetcher.request;
+
+  [chunkFetcher beginFetchWithDelegate:self
+                     didFinishSelector:@selector(chunkFetcher:finishedWithData:error:)];
+}
+
+- (void)attachSendProgressBlockToChunkFetcher:(GTMSessionFetcher *)chunkFetcher {
+  chunkFetcher.sendProgressBlock = ^(int64_t bytesSent, int64_t totalBytesSent,
+                                     int64_t totalBytesExpectedToSend) {
+    // The total bytes expected include the initial body and the full chunked
+    // data, independent of how big this fetcher's chunk is.
+    int64_t initialBodySent = [self bodyLength];  // TODO(grobbins) use [self initialBodySent]
+    int64_t totalSent = initialBodySent + self.currentOffset + totalBytesSent;
+    int64_t totalExpected = initialBodySent + [self fullUploadLength];
+
+    [self invokeDelegateWithDidSendBytes:bytesSent
+                          totalBytesSent:totalSent
+                totalBytesExpectedToSend:totalExpected];
+  };
+}
+
+- (NSDictionary *)uploadSessionIdentifierMetadata {
+  NSMutableDictionary *metadata = [NSMutableDictionary dictionary];
+  metadata[kGTMSessionIdentifierIsUploadChunkFetcherMetadataKey] = @YES;
+  GTMSESSION_ASSERT_DEBUG(self.uploadFileURL,
+                          @"Invalid upload fetcher to create session identifier for metadata");
+  metadata[kGTMSessionIdentifierUploadFileURLMetadataKey] = [self.uploadFileURL absoluteString];
+  metadata[kGTMSessionIdentifierUploadFileLengthMetadataKey] = @([self fullUploadLength]);
+
+  if (self.uploadLocationURL) {
+    metadata[kGTMSessionIdentifierUploadLocationURLMetadataKey] =
+        [self.uploadLocationURL absoluteString];
+  }
+  if (self.uploadMIMEType) {
+    metadata[kGTMSessionIdentifierUploadMIMETypeMetadataKey] = self.uploadMIMEType;
+  }
+  metadata[kGTMSessionIdentifierUploadChunkSizeMetadataKey] = @(self.chunkSize);
+  metadata[kGTMSessionIdentifierUploadCurrentOffsetMetadataKey] = @(self.currentOffset);
+  return metadata;
+}
+
+- (GTMSessionFetcher *)uploadFetcherWithProperties:(NSDictionary *)properties
+                                      isQueryFetch:(BOOL)isQueryFetch {
+  GTMSessionCheckNotSynchronized(self);
+
+  // Common code to make a request for a query command or for a chunk upload.
+  NSURL *uploadLocationURL = self.uploadLocationURL;
+  NSMutableURLRequest *chunkRequest = [NSMutableURLRequest requestWithURL:uploadLocationURL];
+  [chunkRequest setHTTPMethod:@"PUT"];
+
+  // copy the user-agent from the original connection
+  NSURLRequest *origRequest = self.request;
+  NSString *userAgent = [origRequest valueForHTTPHeaderField:@"User-Agent"];
+  if (userAgent.length > 0) {
+    [chunkRequest setValue:userAgent forHTTPHeaderField:@"User-Agent"];
+  }
+  // To avoid timeouts when debugging, copy the timeout of the initial fetcher.
+  NSTimeInterval origTimeout = [origRequest timeoutInterval];
+  [chunkRequest setTimeoutInterval:origTimeout];
+
+  //
+  // Make a new chunk fetcher.
+  //
+  GTMSessionFetcher *chunkFetcher = [GTMSessionFetcher fetcherWithRequest:chunkRequest];
+  chunkFetcher.callbackQueue = self.callbackQueue;
+  chunkFetcher.sessionUserInfo = self.sessionUserInfo;
+  chunkFetcher.configurationBlock = self.configurationBlock;
+  chunkFetcher.allowedInsecureSchemes = self.allowedInsecureSchemes;
+  chunkFetcher.allowLocalhostRequest = self.allowLocalhostRequest;
+  chunkFetcher.allowInvalidServerCertificates = self.allowInvalidServerCertificates;
+  chunkFetcher.useUploadTask = !isQueryFetch;
+
+  if (self.uploadFileURL && !isQueryFetch && self.useBackgroundSession) {
+    [chunkFetcher createSessionIdentifierWithMetadata:[self uploadSessionIdentifierMetadata]];
+  }
+
+  // Give the chunk fetcher the same properties as the previous chunk fetcher
+  chunkFetcher.properties = [properties mutableCopy];
+  [chunkFetcher setProperty:[NSValue valueWithNonretainedObject:self]
+                     forKey:kGTMSessionUploadFetcherChunkParentKey];
+
+  // copy other fetcher settings to the new fetcher
+  chunkFetcher.retryEnabled = self.retryEnabled;
+  chunkFetcher.maxRetryInterval = self.maxRetryInterval;
+
+  if ([self isRetryEnabled]) {
+    // We interpose our own retry method both so we can change the request to ask the server to
+    // tell us where to resume the chunk.
+    chunkFetcher.retryBlock = ^(BOOL suggestedWillRetry, NSError *chunkError,
+                                GTMSessionFetcherRetryResponse response){
+      void (^finish)(BOOL) = ^(BOOL shouldRetry){
+        // We'll retry by sending an offset query.
+        if (shouldRetry) {
+          self.shouldInitiateOffsetQuery = YES;
+
+          // We don't know what our actual offset is anymore, but the server will tell us.
+          self.currentOffset = 0;
+        }
+        // We don't actually want to retry this specific fetcher.
+        response(NO);
+      };
+
+      GTMSessionFetcherRetryBlock retryBlock = self.retryBlock;
+      if (retryBlock) {
+        // Ask the client, then call the finish block above.
+        retryBlock(suggestedWillRetry, chunkError, finish);
+      } else {
+        finish(suggestedWillRetry);
+      }
+    };
+  }
+
+  return chunkFetcher;
+}
+
+- (void)chunkFetcher:(GTMSessionFetcher *)chunkFetcher
+    finishedWithData:(NSData *)data
+               error:(NSError *)error {
+  BOOL hasDestroyedOldChunkFetcher = NO;
+  self.fetcherInFlight = nil;
+
+  NSDictionary *responseHeaders = [chunkFetcher responseHeaders];
+  GTMSessionUploadFetcherStatus uploadStatus =
+      [[self class] uploadStatusFromResponseHeaders:responseHeaders];
+  GTMSESSION_ASSERT_DEBUG(uploadStatus != kStatusUnknown
+                          || error != nil
+                          || self.wasCreatedFromBackgroundSession,
+      @"chunk fetcher completion has kStatusUnknown upload status for headers %@ fetcher %@",
+      responseHeaders, self);
+  BOOL isUploadStatusStopped = (uploadStatus == kStatusFinal || uploadStatus == kStatusCancelled);
+
+  int64_t previousContentLength =
+      [[chunkFetcher.request valueForHTTPHeaderField:@"Content-Length"] longLongValue];
+  // The Content-Length header may not be present if the chunk fetcher was recreated from
+  // a background session.
+  BOOL hasKnownChunkSize = (previousContentLength > 0);
+  BOOL needsQuery = (!hasKnownChunkSize && !isUploadStatusStopped);
+
+  if (error || needsQuery) {
+    NSInteger status = error.code;
+
+    // Status 4xx indicates a bad offset in the Google upload protocol. However, do not retry status
+    // 404 per spec, nor if the upload size appears to have been zero (since the server will just
+    // keep asking us to retry.)
+    if (self.shouldInitiateOffsetQuery ||
+        needsQuery ||
+        ([error.domain isEqual:kGTMSessionFetcherStatusDomain] &&
+         status >= 400 && status <= 499 &&
+         status != 404 &&
+         uploadStatus == kStatusActive &&
+         previousContentLength > 0)) {
+      self.shouldInitiateOffsetQuery = NO;
+      [self destroyChunkFetcher];
+      hasDestroyedOldChunkFetcher = YES;
+      [self sendQueryForUploadOffsetWithFetcherProperties:chunkFetcher.properties];
+    } else {
+      // Some unexpected status has occurred; handle it as we would a regular
+      // object fetcher failure.
+      [self invokeFinalCallbackWithData:data
+                                  error:error
+               shouldInvalidateLocation:NO];
+    }
+  } else {
+    // The chunk has uploaded successfully.
+    int64_t newOffset = self.currentOffset + previousContentLength;
+#if DEBUG
+    // Verify that if we think all of the uploading data has been sent, the server responded with
+    // the "final" upload status.
+    BOOL hasUploadAllData = (newOffset == [self fullUploadLength]);
+    BOOL isFinalStatus = (uploadStatus == kStatusFinal);
+    #pragma unused(hasUploadAllData,isFinalStatus)
+    GTMSESSION_ASSERT_DEBUG(hasUploadAllData == isFinalStatus || !hasKnownChunkSize,
+                            @"uploadStatus:%@  newOffset:%zd (%lld + %zd)  fullUploadLength:%lld"
+                            @" chunkFetcher:%@ requestHeaders:%@ responseHeaders:%@",
+                            [responseHeaders objectForKey:kGTMSessionHeaderXGoogUploadStatus],
+                            newOffset, self.currentOffset, previousContentLength,
+                            [self fullUploadLength],
+                            chunkFetcher, chunkFetcher.request.allHTTPHeaderFields,
+                            responseHeaders);
+#endif
+    if (isUploadStatusStopped) {
+      // This was the last chunk.
+      if (error == nil && uploadStatus == kStatusCancelled) {
+        // Report cancelled status as an error.
+        NSDictionary *userInfo = nil;
+        if (data.length > 0) {
+          userInfo = @{ kGTMSessionFetcherStatusDataKey : data };
+        }
+        data = nil;
+        error = [self prematureFailureErrorWithUserInfo:userInfo];
+      } else {
+        // The upload is in final status.
+        //
+        // Take the chunk fetcher's data as the superclass data.
+        self.downloadedData = data;
+        self.statusCode = chunkFetcher.statusCode;
+      }
+
+      // we're done
+      [self invokeFinalCallbackWithData:data
+                                  error:error
+               shouldInvalidateLocation:YES];
+    } else {
+      // Start the next chunk.
+      self.currentOffset = newOffset;
+
+      // We want to destroy this chunk fetcher before creating the next one, but
+      // we want to pass on its properties
+      NSDictionary *props = [chunkFetcher properties];
+
+      // We no longer need to be able to cancel this chunkFetcher.  Destroy it
+      // before we create a new chunk fetcher.
+      [self destroyChunkFetcher];
+      hasDestroyedOldChunkFetcher = YES;
+
+      [self uploadNextChunkWithOffset:newOffset
+                    fetcherProperties:props];
+    }
+  }
+  if (!hasDestroyedOldChunkFetcher) {
+    [self destroyChunkFetcher];
+  }
+}
+
+- (void)destroyChunkFetcher {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_fetcherInFlight == _chunkFetcher) {
+      _fetcherInFlight = nil;
+    }
+
+    [_chunkFetcher stopFetching];
+
+    NSURL *chunkFileURL = _chunkFetcher.bodyFileURL;
+    BOOL wasTemporaryUploadFile = ![chunkFileURL isEqual:_uploadFileURL];
+    if (wasTemporaryUploadFile) {
+      NSError *error;
+      [[NSFileManager defaultManager] removeItemAtURL:chunkFileURL
+                                                error:&error];
+      if (error) {
+        GTMSESSION_LOG_DEBUG(@"removingItemAtURL failed: %@\n%@", error, chunkFileURL);
+      }
+    }
+
+    _recentChunkReponseHeaders = _chunkFetcher.responseHeaders;
+
+    // To avoid retain cycles, remove all properties except the parent identifier.
+    _chunkFetcher.properties =
+        @{ kGTMSessionUploadFetcherChunkParentKey : [NSValue valueWithNonretainedObject:self] };
+
+    _chunkFetcher.retryBlock = nil;
+    _chunkFetcher.sendProgressBlock = nil;
+    _chunkFetcher = nil;
+  }  // @synchronized(self)
+}
+
+// This method calculates the proper values to pass to the client's send progress block.
+//
+// The actual total bytes sent include the initial body sent, plus the
+// offset into the batched data prior to the current chunk fetcher
+
+- (void)invokeDelegateWithDidSendBytes:(int64_t)bytesSent
+                        totalBytesSent:(int64_t)totalBytesSent
+              totalBytesExpectedToSend:(int64_t)totalBytesExpected {
+  GTMSessionCheckNotSynchronized(self);
+
+  // Ensure the chunk fetcher survives the callback in case the user pauses the upload process.
+  __block GTMSessionFetcher *holdFetcher = self.chunkFetcher;
+
+  [self invokeOnCallbackQueue:self.delegateCallbackQueue
+             afterUserStopped:NO
+                        block:^{
+      GTMSessionFetcherSendProgressBlock sendProgressBlock = self.sendProgressBlock;
+      if (sendProgressBlock) {
+        sendProgressBlock(bytesSent, totalBytesSent, totalBytesExpected);
+      }
+      holdFetcher = nil;
+  }];
+}
+
+- (void)retrieveUploadChunkGranularityFromResponseHeaders:(NSDictionary *)responseHeaders {
+  GTMSessionCheckNotSynchronized(self);
+
+  // Standard granularity for Google uploads is 256K.
+  NSString *chunkGranularityHeader =
+      [responseHeaders objectForKey:@"X-Goog-Upload-Chunk-Granularity"];
+  self.uploadGranularity = chunkGranularityHeader.longLongValue;
+}
+
+#pragma mark -
+
+- (BOOL)isPaused {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _isPaused;
+  }  // @synchronized(self)
+}
+
+- (void)pauseFetching {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _isPaused = YES;
+  }  // @synchronized(self)
+
+  // Pausing just means stopping the current chunk from uploading;
+  // when we resume, we will send a query request to the server to
+  // figure out what bytes to resume sending.
+  //
+  // We won't try to cancel the initial data upload, but rather will check
+  // for being paused in beginChunkFetches.
+  [self destroyChunkFetcher];
+}
+
+- (void)resumeFetching {
+  BOOL wasPaused;
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    wasPaused = _isPaused;
+    _isPaused = NO;
+  }  // @synchronized(self)
+
+  if (wasPaused) {
+    [self sendQueryForUploadOffsetWithFetcherProperties:self.properties];
+  }
+}
+
+- (void)stopFetching {
+  // Overrides the superclass
+  [self destroyChunkFetcher];
+
+  // If we think the server is waiting for more data, then tell it there won't be more.
+  if (self.uploadLocationURL) {
+    [self sendCancelUploadWithFetcherProperties:[self properties]];
+    self.uploadLocationURL = nil;
+  }
+
+  [super stopFetching];
+}
+
+#pragma mark -
+
+// Public properties.
+@synthesize currentOffset = _currentOffset,
+            delegateCompletionHandler = _delegateCompletionHandler,
+            chunkFetcher = _chunkFetcher,
+            lastChunkRequest = _lastChunkRequest,
+            subdataGenerating = _subdataGenerating,
+            shouldInitiateOffsetQuery = _shouldInitiateOffsetQuery,
+            uploadGranularity = _uploadGranularity;
+
+// Internal properties.
+@dynamic fetcherInFlight;
+@dynamic activeFetcher;
+@dynamic statusCode;
+@dynamic delegateCallbackQueue;
+
++ (void)removePointer:(void *)pointer fromPointerArray:(NSPointerArray *)pointerArray {
+  for (NSUInteger index = 0; index < pointerArray.count; ++index) {
+    void *pointerAtIndex = [pointerArray pointerAtIndex:index];
+    if (pointerAtIndex == pointer) {
+      [pointerArray removePointerAtIndex:index];
+      return;
+    }
+  }
+}
+
+- (BOOL)useBackgroundSession {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _useBackgroundSessionOnChunkFetchers;
+  }  // @synchronized(self
+}
+
+- (void)setUseBackgroundSession:(BOOL)useBackgroundSession {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_useBackgroundSessionOnChunkFetchers != useBackgroundSession) {
+      _useBackgroundSessionOnChunkFetchers = useBackgroundSession;
+      NSPointerArray *uploadFetcherPointerArrayForBackgroundSessions =
+          [[self class] uploadFetcherPointerArrayForBackgroundSessions];
+      if (_useBackgroundSessionOnChunkFetchers) {
+        [uploadFetcherPointerArrayForBackgroundSessions addPointer:(__bridge void *)self];
+      } else {
+        [[self class] removePointer:(__bridge void *)self
+                   fromPointerArray:uploadFetcherPointerArrayForBackgroundSessions];
+      }
+    }
+  }  // @synchronized(self
+}
+
+- (BOOL)canFetchWithBackgroundSession {
+  // The initial upload fetcher is always a foreground session; the
+  // useBackgroundSession property will apply only to chunk fetchers,
+  // not to queries.
+  return NO;
+}
+
+- (NSDictionary *)responseHeaders {
+  GTMSessionCheckNotSynchronized(self);
+  // Overrides the superclass
+
+  // If asked for the fetcher's response, use the most recent chunk fetcher's response,
+  // since the original request's response lacks useful information like the actual
+  // Content-Type.
+  NSDictionary *dict = self.chunkFetcher.responseHeaders;
+  if (dict) {
+    return dict;
+  }
+
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    if (_recentChunkReponseHeaders) {
+      return _recentChunkReponseHeaders;
+    }
+  }  // @synchronized(self
+
+  // No chunk fetcher yet completed, so return whatever we have from the initial fetch.
+  return [super responseHeaders];
+}
+
+- (NSInteger)statusCodeUnsynchronized {
+  GTMSessionCheckSynchronized(self);
+
+  if (_recentChunkStatusCode != -1) {
+    // Overrides the superclass to indicate status appropriate to the initial
+    // or latest chunk fetch
+    return _recentChunkStatusCode;
+  } else {
+    return [super statusCodeUnsynchronized];
+  }
+}
+
+
+- (void)setStatusCode:(NSInteger)val {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _recentChunkStatusCode = val;
+  }
+}
+
+- (int64_t)initialBodyLength {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _initialBodyLength;
+  }
+}
+
+- (void)setInitialBodyLength:(int64_t)length {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _initialBodyLength = length;
+  }
+}
+
+- (int64_t)initialBodySent {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _initialBodySent;
+  }
+}
+
+- (void)setInitialBodySent:(int64_t)length {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _initialBodySent = length;
+  }
+}
+
+- (NSURL *)uploadLocationURL {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    return _uploadLocationURL;
+  }
+}
+
+- (void)setUploadLocationURL:(NSURL *)locationURL {
+  @synchronized(self) {
+    GTMSessionMonitorSynchronized(self);
+
+    _uploadLocationURL = locationURL;
+  }
+}
+
+- (GTMSessionFetcher *)activeFetcher {
+  GTMSessionFetcher *result = self.fetcherInFlight;
+  if (result) return result;
+
+  return self;
+}
+
+- (BOOL)isFetching {
+  // If there is an active chunk fetcher, then the upload fetcher is considered
+  // to still be fetching.
+  if (self.fetcherInFlight != nil) return YES;
+
+  return [super isFetching];
+}
+
+- (BOOL)waitForCompletionWithTimeout:(NSTimeInterval)timeoutInSeconds {
+  NSDate *timeoutDate = [NSDate dateWithTimeIntervalSinceNow:timeoutInSeconds];
+
+  while (self.fetcherInFlight || self.subdataGenerating) {
+    if ([timeoutDate timeIntervalSinceNow] < 0) return NO;
+
+    if (self.subdataGenerating) {
+      // Allow time for subdata generation.
+      NSDate *stopDate = [NSDate dateWithTimeIntervalSinceNow:0.001];
+      [[NSRunLoop currentRunLoop] runUntilDate:stopDate];
+    } else {
+      // Wait for any chunk or query fetchers that still have pending callbacks or
+      // notifications.
+      BOOL timedOut;
+
+      if (self.fetcherInFlight == self) {
+        timedOut = ![super waitForCompletionWithTimeout:timeoutInSeconds];
+      } else {
+        timedOut = ![self.fetcherInFlight waitForCompletionWithTimeout:timeoutInSeconds];
+      }
+      if (timedOut) return NO;
+    }
+  }
+  return YES;
+}
+
+@end
+
+@implementation GTMSessionFetcher (GTMSessionUploadFetcherMethods)
+
+- (GTMSessionUploadFetcher *)parentUploadFetcher {
+  NSValue *property = [self propertyForKey:kGTMSessionUploadFetcherChunkParentKey];
+  if (!property) return nil;
+
+  GTMSessionUploadFetcher *uploadFetcher = property.nonretainedObjectValue;
+
+  GTMSESSION_ASSERT_DEBUG([uploadFetcher isKindOfClass:[GTMSessionUploadFetcher class]],
+                          @"Unexpected parent upload fetcher class: %@", [uploadFetcher class]);
+  return uploadFetcher;
+}
+
+@end
diff --git a/Example/Pods/GoogleInterchangeUtilities/Frameworks/GoogleInterchangeUtilities.framework/GoogleInterchangeUtilities b/Example/Pods/GoogleInterchangeUtilities/Frameworks/GoogleInterchangeUtilities.framework/GoogleInterchangeUtilities
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new file mode 100755
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diff --git a/Example/Pods/GoogleNetworkingUtilities/Frameworks/GoogleNetworkingUtilities.framework/GoogleNetworkingUtilities b/Example/Pods/GoogleNetworkingUtilities/Frameworks/GoogleNetworkingUtilities.framework/GoogleNetworkingUtilities
deleted file mode 100644
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diff --git a/Example/Pods/GoogleSymbolUtilities/Frameworks/GoogleSymbolUtilities.framework/GoogleSymbolUtilities b/Example/Pods/GoogleSymbolUtilities/Frameworks/GoogleSymbolUtilities.framework/GoogleSymbolUtilities
deleted file mode 100644
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diff --git a/Example/Pods/GoogleSymbolUtilities/Frameworks/frameworks/GoogleSymbolUtilities.framework/GoogleSymbolUtilities b/Example/Pods/GoogleSymbolUtilities/Frameworks/frameworks/GoogleSymbolUtilities.framework/GoogleSymbolUtilities
new file mode 100755
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diff --git a/Example/Pods/GoogleToolboxForMac/DebugUtils/GTMDebugSelectorValidation.h b/Example/Pods/GoogleToolboxForMac/DebugUtils/GTMDebugSelectorValidation.h
new file mode 100644
index 0000000..2396524
--- /dev/null
+++ b/Example/Pods/GoogleToolboxForMac/DebugUtils/GTMDebugSelectorValidation.h
@@ -0,0 +1,100 @@
+//
+//  GTMDebugSelectorValidation.h
+//
+//  This file should only be included within an implimation file.  In any
+//  function that takes an object and selector to invoke, you should call:
+//
+//    GTMAssertSelectorNilOrImplementedWithArguments(obj, sel, @encode(arg1type), ..., NULL)
+//  or
+//    GTMAssertSelectorNilOrImplementedWithReturnTypeAndArguments(obj, sel, @encode(returnType), @encode(arg1type), ..., NULL)
+//
+//  This will then validate that the selector is defined and using the right
+//  type(s), this can help catch errors much earlier then waiting for the
+//  selector to actually fire (and in the case of error selectors, might never
+//  really be tested until in the field).
+//
+//  Copyright 2007-2008 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+// 
+//  http://www.apache.org/licenses/LICENSE-2.0
+// 
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#if DEBUG
+
+#import <stdarg.h>
+#import "GTMDefines.h"
+
+static void GTMAssertSelectorNilOrImplementedWithReturnTypeAndArguments(id obj, SEL sel, const char *retType, ...) {
+
+  // verify that the object's selector is implemented with the proper
+  // number and type of arguments
+  va_list argList;
+  va_start(argList, retType);
+  
+  if (obj && sel) {
+    // check that the selector is implemented
+    _GTMDevAssert([obj respondsToSelector:sel],
+                  @"\"%@\" selector \"%@\" is unimplemented or misnamed", 
+                  NSStringFromClass([obj class]), 
+                  NSStringFromSelector(sel));
+
+    const char *expectedArgType;
+    NSUInteger argCount = 2; // skip self and _cmd
+    NSMethodSignature *sig = [obj methodSignatureForSelector:sel];
+    
+    // check that each expected argument is present and of the correct type
+    while ((expectedArgType = va_arg(argList, const char*)) != 0) {
+        
+      if ([sig numberOfArguments] > argCount) {
+        const char *foundArgType = [sig getArgumentTypeAtIndex:argCount];
+          
+        _GTMDevAssert(0 == strncmp(foundArgType, expectedArgType, strlen(expectedArgType)),
+                      @"\"%@\" selector \"%@\" argument %u should be type %s", 
+                      NSStringFromClass([obj class]), 
+                      NSStringFromSelector(sel),
+                      (uint32_t)(argCount - 2),
+                      expectedArgType);
+      }
+      argCount++;
+    }
+      
+    // check that the proper number of arguments are present in the selector
+    _GTMDevAssert(argCount == [sig numberOfArguments],
+                  @"\"%@\" selector \"%@\" should have %u arguments",
+                  NSStringFromClass([obj class]), 
+                  NSStringFromSelector(sel),
+                  (uint32_t)(argCount - 2));
+    
+    // if asked, validate the return type
+    if (retType && (strcmp("gtm_skip_return_test", retType) != 0)) {
+      const char *foundRetType = [sig methodReturnType];
+      _GTMDevAssert(0 == strncmp(foundRetType, retType, strlen(retType)),
+                    @"\"%@\" selector \"%@\" return type should be type %s", 
+                    NSStringFromClass([obj class]), 
+                    NSStringFromSelector(sel),
+                    retType);
+    }
+  }
+  
+  va_end(argList);
+}
+
+#define GTMAssertSelectorNilOrImplementedWithArguments(obj, sel, ...) \
+  GTMAssertSelectorNilOrImplementedWithReturnTypeAndArguments((obj), (sel), "gtm_skip_return_test", __VA_ARGS__)
+
+#else // DEBUG
+
+// make it go away if not debug
+#define GTMAssertSelectorNilOrImplementedWithReturnTypeAndArguments(obj, sel, retType, ...) do { } while (0)
+#define GTMAssertSelectorNilOrImplementedWithArguments(obj, sel, ...) do { } while (0)
+
+#endif // DEBUG
diff --git a/Example/Pods/GoogleToolboxForMac/DebugUtils/GTMDebugThreadValidation.h b/Example/Pods/GoogleToolboxForMac/DebugUtils/GTMDebugThreadValidation.h
new file mode 100644
index 0000000..3f50f17
--- /dev/null
+++ b/Example/Pods/GoogleToolboxForMac/DebugUtils/GTMDebugThreadValidation.h
@@ -0,0 +1,44 @@
+//
+//  GTMDebugThreadValidation.h
+//
+//  Copyright 2016 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+// 
+//  http://www.apache.org/licenses/LICENSE-2.0
+// 
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import "GTMDefines.h"
+#import <Foundation/Foundation.h>
+
+// GTMCheckCurrentQueue, GTMIsCurrentQueue
+//
+// GTMCheckCurrentQueue takes a target queue and uses _GTMDevAssert to
+// report if that is not the currently executing queue.
+//
+// GTMIsCurrentQueue takes a target queue and returns true if the target queue
+// is the currently executing dispatch queue. This can be passed to another
+// assertion call in debug builds; it should never be used in release code.
+//
+// The dispatch queue must have a label.
+#define GTMCheckCurrentQueue(targetQueue)                    \
+  _GTMDevAssert(GTMIsCurrentQueue(targetQueue),              \
+                @"Current queue is %s (expected %s)",        \
+                _GTMQueueName(DISPATCH_CURRENT_QUEUE_LABEL), \
+                _GTMQueueName(targetQueue))
+
+#define GTMIsCurrentQueue(targetQueue)                 \
+  (strcmp(_GTMQueueName(DISPATCH_CURRENT_QUEUE_LABEL), \
+          _GTMQueueName(targetQueue)) == 0)
+
+#define _GTMQueueName(queue)                     \
+  (strlen(dispatch_queue_get_label(queue)) > 0 ? \
+    dispatch_queue_get_label(queue) : "unnamed")
diff --git a/Example/Pods/GoogleToolboxForMac/DebugUtils/GTMMethodCheck.h b/Example/Pods/GoogleToolboxForMac/DebugUtils/GTMMethodCheck.h
new file mode 100644
index 0000000..9fad81d
--- /dev/null
+++ b/Example/Pods/GoogleToolboxForMac/DebugUtils/GTMMethodCheck.h
@@ -0,0 +1,69 @@
+//
+//  GTMMethodCheck.h
+//
+//  Copyright 2006-2016 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import <Foundation/Foundation.h>
+#import <stdio.h>
+#import <sysexits.h>
+
+/// A macro for enforcing debug time checks to make sure all required methods are linked in
+//
+// When using categories, it can be very easy to forget to include the
+// implementation of a category.
+// Let's say you had a class foo that depended on method bar of class baz, and
+// method bar was implemented as a member of a category.
+// You could add the following code:
+//
+// GTM_METHOD_CHECK(baz, bar)
+//
+// and the code would check to make sure baz was implemented just before main
+// was called. This works for both dynamic libraries, and executables.
+//
+//
+// This is not compiled into release builds.
+
+#ifdef DEBUG
+
+// This is the "magic".
+// A) we need a multi layer define here so that the preprocessor expands
+//    __LINE__ the way we want it. We need __LINE__ so that each of our
+//    GTM_METHOD_CHECKs generates a unique function name.
+#define GTM_METHOD_CHECK(class, method) GTM_METHOD_CHECK_INNER(class, method, __LINE__)
+#define GTM_METHOD_CHECK_INNER(class, method, line) \
+    GTM_METHOD_CHECK_INNER_INNER(class, method, line)
+
+// B) define a function that is called at startup to check that |class| has an
+//    implementation for |method| (either a class method or an instance method).
+#define GTM_METHOD_CHECK_INNER_INNER(class, method, line) \
+__attribute__ ((constructor, visibility("hidden"))) \
+    static void xxGTMMethodCheckMethod ## class ## line () { \
+  @autoreleasepool { \
+    if (![class instancesRespondToSelector:@selector(method)] \
+        && ![class respondsToSelector:@selector(method)]) { \
+      fprintf(stderr, "%s:%d: error: We need method '%s' to be linked in for class '%s'\n", \
+              __FILE__, line, #method, #class); \
+      exit(EX_SOFTWARE); \
+    } \
+  } \
+}
+
+#else  // DEBUG
+
+// Do nothing in release.
+#define GTM_METHOD_CHECK(class, method)
+
+#endif  // DEBUG
diff --git a/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSData+zlib.h b/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSData+zlib.h
new file mode 100644
index 0000000..dceadc4
--- /dev/null
+++ b/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSData+zlib.h
@@ -0,0 +1,199 @@
+//
+//  GTMNSData+zlib.h
+//
+//  Copyright 2007-2008 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import <Foundation/Foundation.h>
+#import "GTMDefines.h"
+
+/// Helpers for dealing w/ zlib inflate/deflate calls.
+@interface NSData (GTMZLibAdditions)
+
+// NOTE: For 64bit, none of these apis handle input sizes >32bits, they will
+// return nil when given such data.  To handle data of that size you really
+// should be streaming it rather then doing it all in memory.
+
+#pragma mark Gzip Compression
+
+/// Return an autoreleased NSData w/ the result of gzipping the bytes.
+//
+//  Uses the default compression level.
++ (NSData *)gtm_dataByGzippingBytes:(const void *)bytes
+                             length:(NSUInteger)length;
++ (NSData *)gtm_dataByGzippingBytes:(const void *)bytes
+                             length:(NSUInteger)length
+                              error:(NSError **)error;
+
+/// Return an autoreleased NSData w/ the result of gzipping the payload of |data|.
+//
+//  Uses the default compression level.
++ (NSData *)gtm_dataByGzippingData:(NSData *)data __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByGzippingData:(NSData *)data
+                             error:(NSError **)error;
+
+/// Return an autoreleased NSData w/ the result of gzipping the bytes using |level| compression level.
+//
+// |level| can be 1-9, any other values will be clipped to that range.
++ (NSData *)gtm_dataByGzippingBytes:(const void *)bytes
+                             length:(NSUInteger)length
+                   compressionLevel:(int)level __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByGzippingBytes:(const void *)bytes
+                             length:(NSUInteger)length
+                   compressionLevel:(int)level
+                              error:(NSError **)error;
+
+/// Return an autoreleased NSData w/ the result of gzipping the payload of |data| using |level| compression level.
++ (NSData *)gtm_dataByGzippingData:(NSData *)data
+                  compressionLevel:(int)level __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByGzippingData:(NSData *)data
+                  compressionLevel:(int)level
+                             error:(NSError **)error;
+
+#pragma mark Zlib "Stream" Compression
+
+// NOTE: deflate is *NOT* gzip.  deflate is a "zlib" stream.  pick which one
+// you really want to create.  (the inflate api will handle either)
+
+/// Return an autoreleased NSData w/ the result of deflating the bytes.
+//
+//  Uses the default compression level.
++ (NSData *)gtm_dataByDeflatingBytes:(const void *)bytes
+                              length:(NSUInteger)length __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByDeflatingBytes:(const void *)bytes
+                              length:(NSUInteger)length
+                               error:(NSError **)error;
+
+/// Return an autoreleased NSData w/ the result of deflating the payload of |data|.
+//
+//  Uses the default compression level.
++ (NSData *)gtm_dataByDeflatingData:(NSData *)data __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByDeflatingData:(NSData *)data
+                              error:(NSError **)error;
+
+/// Return an autoreleased NSData w/ the result of deflating the bytes using |level| compression level.
+//
+// |level| can be 1-9, any other values will be clipped to that range.
++ (NSData *)gtm_dataByDeflatingBytes:(const void *)bytes
+                              length:(NSUInteger)length
+                    compressionLevel:(int)level __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByDeflatingBytes:(const void *)bytes
+                              length:(NSUInteger)length
+                    compressionLevel:(int)level
+                               error:(NSError **)error;
+
+/// Return an autoreleased NSData w/ the result of deflating the payload of |data| using |level| compression level.
++ (NSData *)gtm_dataByDeflatingData:(NSData *)data
+                   compressionLevel:(int)level __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByDeflatingData:(NSData *)data
+                   compressionLevel:(int)level
+                              error:(NSError **)error;
+
+#pragma mark Uncompress of Gzip or Zlib
+
+/// Return an autoreleased NSData w/ the result of decompressing the bytes.
+//
+// The bytes to decompress can be zlib or gzip payloads.
++ (NSData *)gtm_dataByInflatingBytes:(const void *)bytes
+                              length:(NSUInteger)length __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByInflatingBytes:(const void *)bytes
+                              length:(NSUInteger)length
+                               error:(NSError **)error;
+
+/// Return an autoreleased NSData w/ the result of decompressing the payload of |data|.
+//
+// The data to decompress can be zlib or gzip payloads.
++ (NSData *)gtm_dataByInflatingData:(NSData *)data __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByInflatingData:(NSData *)data
+                              error:(NSError **)error;
+
+#pragma mark "Raw" Compression Support
+
+// NOTE: raw deflate is *NOT* gzip or deflate.  it does not include a header
+// of any form and should only be used within streams here an external crc/etc.
+// is done to validate the data.  The RawInflate apis can be used on data
+// processed like this.
+
+/// Return an autoreleased NSData w/ the result of *raw* deflating the bytes.
+//
+//  Uses the default compression level.
+//  *No* header is added to the resulting data.
++ (NSData *)gtm_dataByRawDeflatingBytes:(const void *)bytes
+                                 length:(NSUInteger)length __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByRawDeflatingBytes:(const void *)bytes
+                                 length:(NSUInteger)length
+                                  error:(NSError **)error;
+
+/// Return an autoreleased NSData w/ the result of *raw* deflating the payload of |data|.
+//
+//  Uses the default compression level.
+//  *No* header is added to the resulting data.
++ (NSData *)gtm_dataByRawDeflatingData:(NSData *)data __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByRawDeflatingData:(NSData *)data
+                                 error:(NSError **)error;
+
+/// Return an autoreleased NSData w/ the result of *raw* deflating the bytes using |level| compression level.
+//
+// |level| can be 1-9, any other values will be clipped to that range.
+//  *No* header is added to the resulting data.
++ (NSData *)gtm_dataByRawDeflatingBytes:(const void *)bytes
+                                 length:(NSUInteger)length
+                       compressionLevel:(int)level __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByRawDeflatingBytes:(const void *)bytes
+                                 length:(NSUInteger)length
+                       compressionLevel:(int)level
+                                  error:(NSError **)error;
+
+/// Return an autoreleased NSData w/ the result of *raw* deflating the payload of |data| using |level| compression level.
+//  *No* header is added to the resulting data.
++ (NSData *)gtm_dataByRawDeflatingData:(NSData *)data
+                      compressionLevel:(int)level __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByRawDeflatingData:(NSData *)data
+                      compressionLevel:(int)level
+                                 error:(NSError **)error;
+
+/// Return an autoreleased NSData w/ the result of *raw* decompressing the bytes.
+//
+// The data to decompress, it should *not* have any header (zlib nor gzip).
++ (NSData *)gtm_dataByRawInflatingBytes:(const void *)bytes
+                                 length:(NSUInteger)length __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByRawInflatingBytes:(const void *)bytes
+                                 length:(NSUInteger)length
+                                  error:(NSError **)error;
+
+/// Return an autoreleased NSData w/ the result of *raw* decompressing the payload of |data|.
+//
+// The data to decompress, it should *not* have any header (zlib nor gzip).
++ (NSData *)gtm_dataByRawInflatingData:(NSData *)data __attribute__((deprecated("Use error variant")));
++ (NSData *)gtm_dataByRawInflatingData:(NSData *)data
+                                 error:(NSError **)error;
+
+@end
+
+FOUNDATION_EXPORT NSString *const GTMNSDataZlibErrorDomain;
+FOUNDATION_EXPORT NSString *const GTMNSDataZlibErrorKey;  // NSNumber
+FOUNDATION_EXPORT NSString *const GTMNSDataZlibRemainingBytesKey;  // NSNumber
+
+typedef NS_ENUM(NSInteger, GTMNSDataZlibError) {
+  GTMNSDataZlibErrorGreaterThan32BitsToCompress = 1024,
+  // An internal zlib error.
+  // GTMNSDataZlibErrorKey will contain the error value.
+  // NSLocalizedDescriptionKey may contain an error string from zlib.
+  // Look in zlib.h for list of errors.
+  GTMNSDataZlibErrorInternal,
+  // There was left over data in the buffer that was not used.
+  // GTMNSDataZlibRemainingBytesKey will contain number of remaining bytes.
+  GTMNSDataZlibErrorDataRemaining
+};
diff --git a/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSData+zlib.m b/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSData+zlib.m
new file mode 100644
index 0000000..bf74b2d
--- /dev/null
+++ b/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSData+zlib.m
@@ -0,0 +1,531 @@
+//
+//  GTMNSData+zlib.m
+//
+//  Copyright 2007-2008 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import "GTMNSData+zlib.h"
+#import <zlib.h>
+#import "GTMDefines.h"
+
+#define kChunkSize 1024
+
+NSString *const GTMNSDataZlibErrorDomain = @"com.google.GTMNSDataZlibErrorDomain";
+NSString *const GTMNSDataZlibErrorKey = @"GTMNSDataZlibErrorKey";
+NSString *const GTMNSDataZlibRemainingBytesKey = @"GTMNSDataZlibRemainingBytesKey";
+
+typedef enum {
+  CompressionModeZlib,
+  CompressionModeGzip,
+  CompressionModeRaw,
+} CompressionMode;
+
+@interface NSData (GTMZlibAdditionsPrivate)
++ (NSData *)gtm_dataByCompressingBytes:(const void *)bytes
+                                length:(NSUInteger)length
+                      compressionLevel:(int)level
+                                  mode:(CompressionMode)mode
+                                 error:(NSError **)error;
++ (NSData *)gtm_dataByInflatingBytes:(const void *)bytes
+                              length:(NSUInteger)length
+                           isRawData:(BOOL)isRawData
+                               error:(NSError **)error;
+@end
+
+@implementation NSData (GTMZlibAdditionsPrivate)
+
++ (NSData *)gtm_dataByCompressingBytes:(const void *)bytes
+                                length:(NSUInteger)length
+                      compressionLevel:(int)level
+                                  mode:(CompressionMode)mode
+                                 error:(NSError **)error {
+  if (!bytes || !length) {
+    return nil;
+  }
+
+#if defined(__LP64__) && __LP64__
+  // Don't support > 32bit length for 64 bit, see note in header.
+  if (length > UINT_MAX) {
+    if (error) {
+      *error = [NSError errorWithDomain:GTMNSDataZlibErrorDomain
+                                   code:GTMNSDataZlibErrorGreaterThan32BitsToCompress
+                               userInfo:nil];
+    }
+    return nil;
+  }
+#endif
+
+  if (level == Z_DEFAULT_COMPRESSION) {
+    // the default value is actually outside the range, so we have to let it
+    // through specifically.
+  } else if (level < Z_BEST_SPEED) {
+    level = Z_BEST_SPEED;
+  } else if (level > Z_BEST_COMPRESSION) {
+    level = Z_BEST_COMPRESSION;
+  }
+
+  z_stream strm;
+  bzero(&strm, sizeof(z_stream));
+
+  int memLevel = 8; // the default
+  int windowBits = 15; // the default
+  switch (mode) {
+    case CompressionModeZlib:
+      // nothing to do
+      break;
+
+    case CompressionModeGzip:
+      windowBits += 16; // enable gzip header instead of zlib header
+      break;
+
+    case CompressionModeRaw:
+      windowBits *= -1; // Negative to mean no header.
+      break;
+  }
+  int retCode;
+  if ((retCode = deflateInit2(&strm, level, Z_DEFLATED, windowBits,
+                              memLevel, Z_DEFAULT_STRATEGY)) != Z_OK) {
+    // COV_NF_START - no real way to force this in a unittest (we guard all args)
+    if (error) {
+      NSDictionary *userInfo = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:retCode]
+                                                           forKey:GTMNSDataZlibErrorKey];
+      *error = [NSError errorWithDomain:GTMNSDataZlibErrorDomain
+                                   code:GTMNSDataZlibErrorInternal
+                               userInfo:userInfo];
+    }
+    return nil;
+    // COV_NF_END
+  }
+
+  // hint the size at 1/4 the input size
+  NSMutableData *result = [NSMutableData dataWithCapacity:(length/4)];
+  unsigned char output[kChunkSize];
+
+  // setup the input
+  strm.avail_in = (unsigned int)length;
+  strm.next_in = (unsigned char*)bytes;
+
+  // loop to collect the data
+  do {
+    // update what we're passing in
+    strm.avail_out = kChunkSize;
+    strm.next_out = output;
+    retCode = deflate(&strm, Z_FINISH);
+    if ((retCode != Z_OK) && (retCode != Z_STREAM_END)) {
+      // COV_NF_START - no real way to force this in a unittest
+      // (in inflate, we can feed bogus/truncated data to test, but an error
+      // here would be some internal issue w/in zlib, and there isn't any real
+      // way to test it)
+      if (error) {
+        NSDictionary *userInfo = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:retCode]
+                                                             forKey:GTMNSDataZlibErrorKey];
+        *error = [NSError errorWithDomain:GTMNSDataZlibErrorDomain
+                                     code:GTMNSDataZlibErrorInternal
+                                 userInfo:userInfo];
+      }
+      deflateEnd(&strm);
+      return nil;
+      // COV_NF_END
+    }
+    // collect what we got
+    unsigned gotBack = kChunkSize - strm.avail_out;
+    if (gotBack > 0) {
+      [result appendBytes:output length:gotBack];
+    }
+
+  } while (retCode == Z_OK);
+
+  // if the loop exits, we used all input and the stream ended
+  _GTMDevAssert(strm.avail_in == 0,
+                @"thought we finished deflate w/o using all input, %u bytes left",
+                strm.avail_in);
+  _GTMDevAssert(retCode == Z_STREAM_END,
+                @"thought we finished deflate w/o getting a result of stream end, code %d",
+                retCode);
+
+  // clean up
+  deflateEnd(&strm);
+
+  return result;
+} // gtm_dataByCompressingBytes:length:compressionLevel:useGzip:
+
++ (NSData *)gtm_dataByInflatingBytes:(const void *)bytes
+                              length:(NSUInteger)length
+                           isRawData:(BOOL)isRawData
+                               error:(NSError **)error {
+  if (!bytes || !length) {
+    return nil;
+  }
+
+#if defined(__LP64__) && __LP64__
+  // Don't support > 32bit length for 64 bit, see note in header.
+  if (length > UINT_MAX) {
+    return nil;
+  }
+#endif
+
+  z_stream strm;
+  bzero(&strm, sizeof(z_stream));
+
+  // setup the input
+  strm.avail_in = (unsigned int)length;
+  strm.next_in = (unsigned char*)bytes;
+
+  int windowBits = 15; // 15 to enable any window size
+  if (isRawData) {
+    windowBits *= -1; // make it negative to signal no header.
+  } else {
+    windowBits += 32; // and +32 to enable zlib or gzip header detection.
+  }
+
+  int retCode;
+  if ((retCode = inflateInit2(&strm, windowBits)) != Z_OK) {
+    // COV_NF_START - no real way to force this in a unittest (we guard all args)
+    if (error) {
+      NSDictionary *userInfo = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:retCode]
+                                                           forKey:GTMNSDataZlibErrorKey];
+      *error = [NSError errorWithDomain:GTMNSDataZlibErrorDomain
+                                   code:GTMNSDataZlibErrorInternal
+                               userInfo:userInfo];
+    }
+    return nil;
+    // COV_NF_END
+  }
+
+  // hint the size at 4x the input size
+  NSMutableData *result = [NSMutableData dataWithCapacity:(length*4)];
+  unsigned char output[kChunkSize];
+
+  // loop to collect the data
+  do {
+    // update what we're passing in
+    strm.avail_out = kChunkSize;
+    strm.next_out = output;
+    retCode = inflate(&strm, Z_NO_FLUSH);
+    if ((retCode != Z_OK) && (retCode != Z_STREAM_END)) {
+      if (error) {
+        NSMutableDictionary *userInfo =
+            [NSMutableDictionary dictionaryWithObject:[NSNumber numberWithInt:retCode]
+                                               forKey:GTMNSDataZlibErrorKey];
+        if (strm.msg) {
+          NSString *message = [NSString stringWithUTF8String:strm.msg];
+          if (message) {
+            [userInfo setObject:message forKey:NSLocalizedDescriptionKey];
+          }
+        }
+        *error = [NSError errorWithDomain:GTMNSDataZlibErrorDomain
+                                     code:GTMNSDataZlibErrorInternal
+                                 userInfo:userInfo];
+      }
+      inflateEnd(&strm);
+      return nil;
+    }
+    // collect what we got
+    unsigned gotBack = kChunkSize - strm.avail_out;
+    if (gotBack > 0) {
+      [result appendBytes:output length:gotBack];
+    }
+
+  } while (retCode == Z_OK);
+
+  // make sure there wasn't more data tacked onto the end of a valid compressed
+  // stream.
+  if (strm.avail_in != 0) {
+    if (error) {
+      NSDictionary *userInfo =
+          [NSDictionary dictionaryWithObject:[NSNumber numberWithUnsignedInt:strm.avail_in]
+                                      forKey:GTMNSDataZlibRemainingBytesKey];
+      *error = [NSError errorWithDomain:GTMNSDataZlibErrorDomain
+                                   code:GTMNSDataZlibErrorDataRemaining
+                               userInfo:userInfo];
+    }
+    result = nil;
+  }
+  // the only way out of the loop was by hitting the end of the stream
+  _GTMDevAssert(retCode == Z_STREAM_END,
+                @"thought we finished inflate w/o getting a result of stream end, code %d",
+                retCode);
+
+  // clean up
+  inflateEnd(&strm);
+
+  return result;
+} // gtm_dataByInflatingBytes:length:windowBits:
+
+@end
+
+
+@implementation NSData (GTMZLibAdditions)
+
++ (NSData *)gtm_dataByGzippingBytes:(const void *)bytes
+                             length:(NSUInteger)length {
+  return [self gtm_dataByGzippingBytes:bytes length:length error:NULL];
+} // gtm_dataByGzippingBytes:length:
+
++ (NSData *)gtm_dataByGzippingBytes:(const void *)bytes
+                             length:(NSUInteger)length
+                              error:(NSError **)error {
+  return [self gtm_dataByCompressingBytes:bytes
+                                   length:length
+                         compressionLevel:Z_DEFAULT_COMPRESSION
+                                     mode:CompressionModeGzip
+                                    error:error];
+} // gtm_dataByGzippingBytes:length:error:
+
++ (NSData *)gtm_dataByGzippingData:(NSData *)data {
+  return [self gtm_dataByGzippingData:data error:NULL];
+} // gtm_dataByGzippingData:
+
++ (NSData *)gtm_dataByGzippingData:(NSData *)data error:(NSError **)error {
+  return [self gtm_dataByCompressingBytes:[data bytes]
+                                   length:[data length]
+                         compressionLevel:Z_DEFAULT_COMPRESSION
+                                     mode:CompressionModeGzip
+                                    error:error];
+} // gtm_dataByGzippingData:error:
+
++ (NSData *)gtm_dataByGzippingBytes:(const void *)bytes
+                             length:(NSUInteger)length
+                   compressionLevel:(int)level {
+  return [self gtm_dataByGzippingBytes:bytes
+                                length:length
+                      compressionLevel:level
+                                 error:NULL];
+} // gtm_dataByGzippingBytes:length:level:
+
++ (NSData *)gtm_dataByGzippingBytes:(const void *)bytes
+                             length:(NSUInteger)length
+                   compressionLevel:(int)level
+                              error:(NSError **)error{
+  return [self gtm_dataByCompressingBytes:bytes
+                                   length:length
+                         compressionLevel:level
+                                     mode:CompressionModeGzip
+                                    error:error];
+} // gtm_dataByGzippingBytes:length:level:error
+
++ (NSData *)gtm_dataByGzippingData:(NSData *)data
+                  compressionLevel:(int)level {
+  return [self gtm_dataByGzippingData:data
+                     compressionLevel:level
+                                error:NULL];
+} // gtm_dataByGzippingData:level:
+
++ (NSData *)gtm_dataByGzippingData:(NSData *)data
+                  compressionLevel:(int)level
+                             error:(NSError **)error{
+  return [self gtm_dataByCompressingBytes:[data bytes]
+                                   length:[data length]
+                         compressionLevel:level
+                                     mode:CompressionModeGzip
+                                    error:error];
+} // gtm_dataByGzippingData:level:error
+
+#pragma mark -
+
++ (NSData *)gtm_dataByDeflatingBytes:(const void *)bytes
+                              length:(NSUInteger)length {
+  return [self gtm_dataByDeflatingBytes:bytes
+                                 length:length
+                                  error:NULL];
+} // gtm_dataByDeflatingBytes:length:
+
++ (NSData *)gtm_dataByDeflatingBytes:(const void *)bytes
+                              length:(NSUInteger)length
+                               error:(NSError **)error{
+  return [self gtm_dataByCompressingBytes:bytes
+                                   length:length
+                         compressionLevel:Z_DEFAULT_COMPRESSION
+                                     mode:CompressionModeZlib
+                                    error:error];
+} // gtm_dataByDeflatingBytes:length:error
+
++ (NSData *)gtm_dataByDeflatingData:(NSData *)data {
+  return [self gtm_dataByDeflatingData:data error:NULL];
+} // gtm_dataByDeflatingData:
+
++ (NSData *)gtm_dataByDeflatingData:(NSData *)data error:(NSError **)error {
+  return [self gtm_dataByCompressingBytes:[data bytes]
+                                   length:[data length]
+                         compressionLevel:Z_DEFAULT_COMPRESSION
+                                     mode:CompressionModeZlib
+                                    error:error];
+} // gtm_dataByDeflatingData:
+
++ (NSData *)gtm_dataByDeflatingBytes:(const void *)bytes
+                              length:(NSUInteger)length
+                    compressionLevel:(int)level {
+  return [self gtm_dataByDeflatingBytes:bytes
+                                 length:length
+                       compressionLevel:level
+                                  error:NULL];
+} // gtm_dataByDeflatingBytes:length:level:
+
++ (NSData *)gtm_dataByDeflatingBytes:(const void *)bytes
+                              length:(NSUInteger)length
+                    compressionLevel:(int)level
+                               error:(NSError **)error {
+  return [self gtm_dataByCompressingBytes:bytes
+                                   length:length
+                         compressionLevel:level
+                                     mode:CompressionModeZlib
+                                    error:error];
+} // gtm_dataByDeflatingBytes:length:level:error:
+
++ (NSData *)gtm_dataByDeflatingData:(NSData *)data
+                   compressionLevel:(int)level {
+  return [self gtm_dataByDeflatingData:data
+                      compressionLevel:level
+                                 error:NULL];
+} // gtm_dataByDeflatingData:level:
+
++ (NSData *)gtm_dataByDeflatingData:(NSData *)data
+                   compressionLevel:(int)level
+                              error:(NSError **)error {
+  return [self gtm_dataByCompressingBytes:[data bytes]
+                                   length:[data length]
+                         compressionLevel:level
+                                     mode:CompressionModeZlib
+                                    error:error];
+} // gtm_dataByDeflatingData:level:error:
+
+#pragma mark -
+
++ (NSData *)gtm_dataByInflatingBytes:(const void *)bytes
+                              length:(NSUInteger)length {
+  return [self gtm_dataByInflatingBytes:bytes
+                                 length:length
+                                  error:NULL];
+} // gtm_dataByInflatingBytes:length:
+
++ (NSData *)gtm_dataByInflatingBytes:(const void *)bytes
+                              length:(NSUInteger)length
+                               error:(NSError **)error {
+  return [self gtm_dataByInflatingBytes:bytes
+                                 length:length
+                              isRawData:NO
+                                  error:error];
+} // gtm_dataByInflatingBytes:length:error:
+
++ (NSData *)gtm_dataByInflatingData:(NSData *)data {
+  return [self gtm_dataByInflatingData:data error:NULL];
+} // gtm_dataByInflatingData:
+
++ (NSData *)gtm_dataByInflatingData:(NSData *)data
+                              error:(NSError **)error {
+  return [self gtm_dataByInflatingBytes:[data bytes]
+                                 length:[data length]
+                              isRawData:NO
+                                  error:error];
+} // gtm_dataByInflatingData:
+
+#pragma mark -
+
++ (NSData *)gtm_dataByRawDeflatingBytes:(const void *)bytes
+                                 length:(NSUInteger)length {
+  return [self gtm_dataByRawDeflatingBytes:(const void *)bytes
+                                    length:(NSUInteger)length
+                                     error:NULL];
+} // gtm_dataByRawDeflatingBytes:length:
+
++ (NSData *)gtm_dataByRawDeflatingBytes:(const void *)bytes
+                                 length:(NSUInteger)length
+                                  error:(NSError **)error {
+  return [self gtm_dataByCompressingBytes:bytes
+                                   length:length
+                         compressionLevel:Z_DEFAULT_COMPRESSION
+                                     mode:CompressionModeRaw
+                                    error:error];
+} // gtm_dataByRawDeflatingBytes:length:error:
+
++ (NSData *)gtm_dataByRawDeflatingData:(NSData *)data {
+  return [self gtm_dataByRawDeflatingData:data error:NULL];
+} // gtm_dataByRawDeflatingData:
+
++ (NSData *)gtm_dataByRawDeflatingData:(NSData *)data error:(NSError **)error {
+  return [self gtm_dataByCompressingBytes:[data bytes]
+                                   length:[data length]
+                         compressionLevel:Z_DEFAULT_COMPRESSION
+                                     mode:CompressionModeRaw
+                                    error:error];
+} // gtm_dataByRawDeflatingData:error:
+
++ (NSData *)gtm_dataByRawDeflatingBytes:(const void *)bytes
+                                 length:(NSUInteger)length
+                       compressionLevel:(int)level {
+  return [self gtm_dataByRawDeflatingBytes:bytes
+                                    length:length
+                          compressionLevel:level
+                                     error:NULL];
+} // gtm_dataByRawDeflatingBytes:length:compressionLevel:
+
++ (NSData *)gtm_dataByRawDeflatingBytes:(const void *)bytes
+                                 length:(NSUInteger)length
+                       compressionLevel:(int)level
+                                  error:(NSError **)error{
+  return [self gtm_dataByCompressingBytes:bytes
+                                   length:length
+                         compressionLevel:level
+                                     mode:CompressionModeRaw
+                                    error:error];
+} // gtm_dataByRawDeflatingBytes:length:compressionLevel:error:
+
++ (NSData *)gtm_dataByRawDeflatingData:(NSData *)data
+                      compressionLevel:(int)level {
+  return [self gtm_dataByRawDeflatingData:data
+                         compressionLevel:level
+                                    error:NULL];
+} // gtm_dataByRawDeflatingData:compressionLevel:
+
++ (NSData *)gtm_dataByRawDeflatingData:(NSData *)data
+                      compressionLevel:(int)level
+                                 error:(NSError **)error {
+  return [self gtm_dataByCompressingBytes:[data bytes]
+                                   length:[data length]
+                         compressionLevel:level
+                                     mode:CompressionModeRaw
+                                    error:error];
+} // gtm_dataByRawDeflatingData:compressionLevel:error:
+
++ (NSData *)gtm_dataByRawInflatingBytes:(const void *)bytes
+                                 length:(NSUInteger)length {
+  return [self gtm_dataByInflatingBytes:bytes
+                                 length:length
+                                  error:NULL];
+} // gtm_dataByRawInflatingBytes:length:
+
++ (NSData *)gtm_dataByRawInflatingBytes:(const void *)bytes
+                                 length:(NSUInteger)length
+                                  error:(NSError **)error{
+  return [self gtm_dataByInflatingBytes:bytes
+                                 length:length
+                              isRawData:YES
+                                  error:error];
+} // gtm_dataByRawInflatingBytes:length:error:
+
++ (NSData *)gtm_dataByRawInflatingData:(NSData *)data {
+  return [self gtm_dataByRawInflatingData:data
+                                    error:NULL];
+} // gtm_dataByRawInflatingData:
+
++ (NSData *)gtm_dataByRawInflatingData:(NSData *)data
+                                 error:(NSError **)error {
+  return [self gtm_dataByInflatingBytes:[data bytes]
+                                 length:[data length]
+                              isRawData:YES
+                                  error:error];
+} // gtm_dataByRawInflatingData:error:
+
+@end
diff --git a/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSDictionary+URLArguments.h b/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSDictionary+URLArguments.h
new file mode 100644
index 0000000..b2f0564
--- /dev/null
+++ b/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSDictionary+URLArguments.h
@@ -0,0 +1,40 @@
+//
+//  GTMNSDictionary+URLArguments.h
+//
+//  Copyright 2006-2008 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+// 
+//  http://www.apache.org/licenses/LICENSE-2.0
+// 
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import <Foundation/Foundation.h>
+
+/// Utility for building a URL or POST argument string.
+@interface NSDictionary (GTMNSDictionaryURLArgumentsAdditions)
+
+/// Returns a dictionary of the decoded key-value pairs in a http arguments
+/// string of the form key1=value1&key2=value2&...&keyN=valueN.
+/// Keys and values will be unescaped automatically.
+/// Only the first value for a repeated key is returned.
+///
+/// NOTE: Apps targeting iOS 8 or OS X 10.10 and later should use
+///       NSURLComponents and NSURLQueryItem to create URLs with
+///       query arguments instead of using these category methods.
++ (NSDictionary *)gtm_dictionaryWithHttpArgumentsString:(NSString *)argString;
+
+/// Gets a string representation of the dictionary in the form
+/// key1=value1&key2=value2&...&keyN=valueN, suitable for use as either
+/// URL arguments (after a '?') or POST body. Keys and values will be escaped
+/// automatically, so should be unescaped in the dictionary.
+- (NSString *)gtm_httpArgumentsString;
+
+@end
diff --git a/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSDictionary+URLArguments.m b/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSDictionary+URLArguments.m
new file mode 100644
index 0000000..e9fa766
--- /dev/null
+++ b/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSDictionary+URLArguments.m
@@ -0,0 +1,77 @@
+//
+//  GTMNSDictionary+URLArguments.m
+//
+//  Copyright 2006-2008 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import "GTMNSDictionary+URLArguments.h"
+#import "GTMNSString+URLArguments.h"
+#import "GTMMethodCheck.h"
+#import "GTMDefines.h"
+
+
+// Export a nonsense symbol to suppress a libtool warning when this is linked alone in a static lib.
+__attribute__((visibility("default")))
+    char GTMNSDictionaryURLArgumentsExportToSuppressLibToolWarning = 0;
+
+
+@implementation NSDictionary (GTMNSDictionaryURLArgumentsAdditions)
+
+GTM_METHOD_CHECK(NSString, gtm_stringByEscapingForURLArgument);
+GTM_METHOD_CHECK(NSString, gtm_stringByUnescapingFromURLArgument);
+
++ (NSDictionary *)gtm_dictionaryWithHttpArgumentsString:(NSString *)argString {
+  NSMutableDictionary* ret = [NSMutableDictionary dictionary];
+  NSArray* components = [argString componentsSeparatedByString:@"&"];
+  NSString* component;
+  // Use reverse order so that the first occurrence of a key replaces
+  // those subsequent.
+  for (component in [components reverseObjectEnumerator]) {
+    if ([component length] == 0)
+      continue;
+    NSRange pos = [component rangeOfString:@"="];
+    NSString *key;
+    NSString *val;
+    if (pos.location == NSNotFound) {
+      key = [component gtm_stringByUnescapingFromURLArgument];
+      val = @"";
+    } else {
+      key = [[component substringToIndex:pos.location]
+             gtm_stringByUnescapingFromURLArgument];
+      val = [[component substringFromIndex:pos.location + pos.length]
+             gtm_stringByUnescapingFromURLArgument];
+    }
+    // gtm_stringByUnescapingFromURLArgument returns nil on invalid UTF8
+    // and NSMutableDictionary raises an exception when passed nil values.
+    if (!key) key = @"";
+    if (!val) val = @"";
+    [ret setObject:val forKey:key];
+  }
+  return ret;
+}
+
+- (NSString *)gtm_httpArgumentsString {
+  NSMutableArray* arguments = [NSMutableArray arrayWithCapacity:[self count]];
+  NSString* key;
+  for (key in self) {
+    [arguments addObject:[NSString stringWithFormat:@"%@=%@",
+                          [key gtm_stringByEscapingForURLArgument],
+                          [[[self objectForKey:key] description] gtm_stringByEscapingForURLArgument]]];
+  }
+
+  return [arguments componentsJoinedByString:@"&"];
+}
+
+@end
diff --git a/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSString+URLArguments.h b/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSString+URLArguments.h
new file mode 100644
index 0000000..b3a3e3e
--- /dev/null
+++ b/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSString+URLArguments.h
@@ -0,0 +1,45 @@
+//
+//  GTMNSString+URLArguments.h
+//
+//  Copyright 2006-2008 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+// 
+//  http://www.apache.org/licenses/LICENSE-2.0
+// 
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import <Foundation/Foundation.h>
+
+/// Utilities for encoding and decoding URL arguments.
+@interface NSString (GTMNSStringURLArgumentsAdditions)
+
+/// Returns a string that is escaped properly to be a URL argument.
+///
+/// This differs from stringByAddingPercentEscapesUsingEncoding: in that it
+/// will escape all the reserved characters (per RFC 3986
+/// <http://www.ietf.org/rfc/rfc3986.txt>) which
+/// stringByAddingPercentEscapesUsingEncoding would leave.
+///
+/// This will also escape '%', so this should not be used on a string that has
+/// already been escaped unless double-escaping is the desired result.
+///
+/// NOTE: Apps targeting iOS 8 or OS X 10.10 and later should use
+///       NSURLComponents and NSURLQueryItem to create properly-escaped
+///       URLs instead of using these category methods.
+- (NSString*)gtm_stringByEscapingForURLArgument;
+
+/// Returns the unescaped version of a URL argument
+///
+/// This has the same behavior as stringByReplacingPercentEscapesUsingEncoding:,
+/// except that it will also convert '+' to space.
+- (NSString*)gtm_stringByUnescapingFromURLArgument;
+
+@end
diff --git a/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSString+URLArguments.m b/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSString+URLArguments.m
new file mode 100644
index 0000000..e785c5e
--- /dev/null
+++ b/Example/Pods/GoogleToolboxForMac/Foundation/GTMNSString+URLArguments.m
@@ -0,0 +1,48 @@
+//
+//  GTMNSString+URLArguments.m
+//
+//  Copyright 2006-2008 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import "GTMNSString+URLArguments.h"
+
+@implementation NSString (GTMNSStringURLArgumentsAdditions)
+
+- (NSString *)gtm_stringByEscapingForURLArgument {
+  // Encode all the reserved characters, per RFC 3986
+  // (<http://www.ietf.org/rfc/rfc3986.txt>)
+  CFStringRef escaped =
+    CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
+                                            (CFStringRef)self,
+                                            NULL,
+                                            (CFStringRef)@"!*'();:@&=+$,/?%#[]",
+                                            kCFStringEncodingUTF8);
+#if defined(__has_feature) && __has_feature(objc_arc)
+  return CFBridgingRelease(escaped);
+#else
+  return [(NSString *)escaped autorelease];
+#endif
+}
+
+- (NSString *)gtm_stringByUnescapingFromURLArgument {
+  NSMutableString *resultString = [NSMutableString stringWithString:self];
+  [resultString replaceOccurrencesOfString:@"+"
+                                withString:@" "
+                                   options:NSLiteralSearch
+                                     range:NSMakeRange(0, [resultString length])];
+  return [resultString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
+}
+
+@end
diff --git a/Example/Pods/GoogleToolboxForMac/GTMDefines.h b/Example/Pods/GoogleToolboxForMac/GTMDefines.h
new file mode 100644
index 0000000..7baa7b2
--- /dev/null
+++ b/Example/Pods/GoogleToolboxForMac/GTMDefines.h
@@ -0,0 +1,401 @@
+//
+// GTMDefines.h
+//
+//  Copyright 2008 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+// ============================================================================
+
+#include <AvailabilityMacros.h>
+#include <TargetConditionals.h>
+
+#ifdef __OBJC__
+#include <Foundation/NSObjCRuntime.h>
+#endif  // __OBJC__
+
+#if TARGET_OS_IPHONE
+#include <Availability.h>
+#endif  // TARGET_OS_IPHONE
+
+// ----------------------------------------------------------------------------
+// CPP symbols that can be overridden in a prefix to control how the toolbox
+// is compiled.
+// ----------------------------------------------------------------------------
+
+
+// By setting the GTM_CONTAINERS_VALIDATION_FAILED_LOG and
+// GTM_CONTAINERS_VALIDATION_FAILED_ASSERT macros you can control what happens
+// when a validation fails. If you implement your own validators, you may want
+// to control their internals using the same macros for consistency.
+#ifndef GTM_CONTAINERS_VALIDATION_FAILED_ASSERT
+  #define GTM_CONTAINERS_VALIDATION_FAILED_ASSERT 0
+#endif
+
+// Ensure __has_feature and __has_extension are safe to use.
+// See http://clang-analyzer.llvm.org/annotations.html
+#ifndef __has_feature      // Optional.
+  #define __has_feature(x) 0 // Compatibility with non-clang compilers.
+#endif
+
+#ifndef __has_extension
+  #define __has_extension __has_feature // Compatibility with pre-3.0 compilers.
+#endif
+
+// Give ourselves a consistent way to do inlines.  Apple's macros even use
+// a few different actual definitions, so we're based off of the foundation
+// one.
+#if !defined(GTM_INLINE)
+  #if (defined (__GNUC__) && (__GNUC__ == 4)) || defined (__clang__)
+    #define GTM_INLINE static __inline__ __attribute__((always_inline))
+  #else
+    #define GTM_INLINE static __inline__
+  #endif
+#endif
+
+// Give ourselves a consistent way of doing externs that links up nicely
+// when mixing objc and objc++
+#if !defined (GTM_EXTERN)
+  #if defined __cplusplus
+    #define GTM_EXTERN extern "C"
+    #define GTM_EXTERN_C_BEGIN extern "C" {
+    #define GTM_EXTERN_C_END }
+  #else
+    #define GTM_EXTERN extern
+    #define GTM_EXTERN_C_BEGIN
+    #define GTM_EXTERN_C_END
+  #endif
+#endif
+
+// Give ourselves a consistent way of exporting things if we have visibility
+// set to hidden.
+#if !defined (GTM_EXPORT)
+  #define GTM_EXPORT __attribute__((visibility("default")))
+#endif
+
+// Give ourselves a consistent way of declaring something as unused. This
+// doesn't use __unused because that is only supported in gcc 4.2 and greater.
+#if !defined (GTM_UNUSED)
+#define GTM_UNUSED(x) ((void)(x))
+#endif
+
+// _GTMDevLog & _GTMDevAssert
+//
+// _GTMDevLog & _GTMDevAssert are meant to be a very lightweight shell for
+// developer level errors.  This implementation simply macros to NSLog/NSAssert.
+// It is not intended to be a general logging/reporting system.
+//
+// Please see http://code.google.com/p/google-toolbox-for-mac/wiki/DevLogNAssert
+// for a little more background on the usage of these macros.
+//
+//    _GTMDevLog           log some error/problem in debug builds
+//    _GTMDevAssert        assert if condition isn't met w/in a method/function
+//                           in all builds.
+//
+// To replace this system, just provide different macro definitions in your
+// prefix header.  Remember, any implementation you provide *must* be thread
+// safe since this could be called by anything in what ever situtation it has
+// been placed in.
+//
+
+// We only define the simple macros if nothing else has defined this.
+#ifndef _GTMDevLog
+
+#ifdef DEBUG
+  #define _GTMDevLog(...) NSLog(__VA_ARGS__)
+#else
+  #define _GTMDevLog(...) do { } while (0)
+#endif
+
+#endif // _GTMDevLog
+
+#ifndef _GTMDevAssert
+// we directly invoke the NSAssert handler so we can pass on the varargs
+// (NSAssert doesn't have a macro we can use that takes varargs)
+#if !defined(NS_BLOCK_ASSERTIONS)
+  #define _GTMDevAssert(condition, ...)                                       \
+    do {                                                                      \
+      if (!(condition)) {                                                     \
+        [[NSAssertionHandler currentHandler]                                  \
+            handleFailureInFunction:(NSString *)                              \
+                                        [NSString stringWithUTF8String:__PRETTY_FUNCTION__] \
+                               file:(NSString *)[NSString stringWithUTF8String:__FILE__]  \
+                         lineNumber:__LINE__                                  \
+                        description:__VA_ARGS__];                             \
+      }                                                                       \
+    } while(0)
+#else // !defined(NS_BLOCK_ASSERTIONS)
+  #define _GTMDevAssert(condition, ...) do { } while (0)
+#endif // !defined(NS_BLOCK_ASSERTIONS)
+
+#endif // _GTMDevAssert
+
+// _GTMCompileAssert
+//
+// Note:  Software for current compilers should just use _Static_assert directly
+// instead of this macro.
+//
+// _GTMCompileAssert is an assert that is meant to fire at compile time if you
+// want to check things at compile instead of runtime. For example if you
+// want to check that a wchar is 4 bytes instead of 2 you would use
+// _GTMCompileAssert(sizeof(wchar_t) == 4, wchar_t_is_4_bytes_on_OS_X)
+// Note that the second "arg" is not in quotes, and must be a valid processor
+// symbol in it's own right (no spaces, punctuation etc).
+
+// Wrapping this in an #ifndef allows external groups to define their own
+// compile time assert scheme.
+#ifndef _GTMCompileAssert
+  #if __has_feature(c_static_assert) || __has_extension(c_static_assert)
+    #define _GTMCompileAssert(test, msg) _Static_assert((test), #msg)
+  #else
+    // Pre-Xcode 7 support.
+    //
+    // We got this technique from here:
+    // http://unixjunkie.blogspot.com/2007/10/better-compile-time-asserts_29.html
+    #define _GTMCompileAssertSymbolInner(line, msg) _GTMCOMPILEASSERT ## line ## __ ## msg
+    #define _GTMCompileAssertSymbol(line, msg) _GTMCompileAssertSymbolInner(line, msg)
+    #define _GTMCompileAssert(test, msg) \
+      typedef char _GTMCompileAssertSymbol(__LINE__, msg) [ ((test) ? 1 : -1) ]
+  #endif  // __has_feature(c_static_assert) || __has_extension(c_static_assert)
+#endif // _GTMCompileAssert
+
+// ----------------------------------------------------------------------------
+// CPP symbols defined based on the project settings so the GTM code has
+// simple things to test against w/o scattering the knowledge of project
+// setting through all the code.
+// ----------------------------------------------------------------------------
+
+// Provide a single constant CPP symbol that all of GTM uses for ifdefing
+// iPhone code.
+#if TARGET_OS_IPHONE // iPhone SDK
+  // For iPhone specific stuff
+  #define GTM_IPHONE_SDK 1
+  #if TARGET_IPHONE_SIMULATOR
+    #define GTM_IPHONE_DEVICE 0
+    #define GTM_IPHONE_SIMULATOR 1
+  #else
+    #define GTM_IPHONE_DEVICE 1
+    #define GTM_IPHONE_SIMULATOR 0
+  #endif  // TARGET_IPHONE_SIMULATOR
+  // By default, GTM has provided it's own unittesting support, define this
+  // to use the support provided by Xcode, especially for the Xcode4 support
+  // for unittesting.
+  // This is going to be deprecated as Apple is deprecating SenTest.
+  #ifndef GTM_IPHONE_USE_SENTEST
+    #define GTM_IPHONE_USE_SENTEST 0
+  #endif
+  // Define this to use XCTest instead of OCUnit/SenTest.
+  #ifndef GTM_USING_XCTEST
+    #define GTM_USING_XCTEST 0
+  #endif
+  #if GTM_IPHONE_USE_SENTEST && GTM_USING_XCTEST
+    #error Can't define both GTM_IPHONE_USE_SENTEST and GTM_USING_XCTEST
+  #endif
+  #define GTM_MACOS_SDK 0
+#else
+  // For MacOS specific stuff
+  #define GTM_MACOS_SDK 1
+  #define GTM_IPHONE_SDK 0
+  #define GTM_IPHONE_SIMULATOR 0
+  #define GTM_IPHONE_DEVICE 0
+  #define GTM_IPHONE_USE_SENTEST 0
+  #ifndef GTM_USING_XCTEST
+    #define GTM_USING_XCTEST 0
+  #endif
+#endif
+
+// Some of our own availability macros
+#if GTM_MACOS_SDK
+#define GTM_AVAILABLE_ONLY_ON_IPHONE UNAVAILABLE_ATTRIBUTE
+#define GTM_AVAILABLE_ONLY_ON_MACOS
+#else
+#define GTM_AVAILABLE_ONLY_ON_IPHONE
+#define GTM_AVAILABLE_ONLY_ON_MACOS UNAVAILABLE_ATTRIBUTE
+#endif
+
+// GC was dropped by Apple, define the old constant incase anyone still keys
+// off of it.
+#ifndef GTM_SUPPORT_GC
+  #define GTM_SUPPORT_GC 0
+#endif
+
+// Some support for advanced clang static analysis functionality
+#ifndef NS_RETURNS_RETAINED
+  #if __has_feature(attribute_ns_returns_retained)
+    #define NS_RETURNS_RETAINED __attribute__((ns_returns_retained))
+  #else
+    #define NS_RETURNS_RETAINED
+  #endif
+#endif
+
+#ifndef NS_RETURNS_NOT_RETAINED
+  #if __has_feature(attribute_ns_returns_not_retained)
+    #define NS_RETURNS_NOT_RETAINED __attribute__((ns_returns_not_retained))
+  #else
+    #define NS_RETURNS_NOT_RETAINED
+  #endif
+#endif
+
+#ifndef CF_RETURNS_RETAINED
+  #if __has_feature(attribute_cf_returns_retained)
+    #define CF_RETURNS_RETAINED __attribute__((cf_returns_retained))
+  #else
+    #define CF_RETURNS_RETAINED
+  #endif
+#endif
+
+#ifndef CF_RETURNS_NOT_RETAINED
+  #if __has_feature(attribute_cf_returns_not_retained)
+    #define CF_RETURNS_NOT_RETAINED __attribute__((cf_returns_not_retained))
+  #else
+    #define CF_RETURNS_NOT_RETAINED
+  #endif
+#endif
+
+#ifndef NS_CONSUMED
+  #if __has_feature(attribute_ns_consumed)
+    #define NS_CONSUMED __attribute__((ns_consumed))
+  #else
+    #define NS_CONSUMED
+  #endif
+#endif
+
+#ifndef CF_CONSUMED
+  #if __has_feature(attribute_cf_consumed)
+    #define CF_CONSUMED __attribute__((cf_consumed))
+  #else
+    #define CF_CONSUMED
+  #endif
+#endif
+
+#ifndef NS_CONSUMES_SELF
+  #if __has_feature(attribute_ns_consumes_self)
+    #define NS_CONSUMES_SELF __attribute__((ns_consumes_self))
+  #else
+    #define NS_CONSUMES_SELF
+  #endif
+#endif
+
+#ifndef GTM_NONNULL
+  #if defined(__has_attribute)
+    #if __has_attribute(nonnull)
+      #define GTM_NONNULL(x) __attribute__((nonnull x))
+    #else
+      #define GTM_NONNULL(x)
+    #endif
+  #else
+    #define GTM_NONNULL(x)
+  #endif
+#endif
+
+// Invalidates the initializer from which it's called.
+#ifndef GTMInvalidateInitializer
+  #if __has_feature(objc_arc)
+    #define GTMInvalidateInitializer() \
+      do { \
+        [self class]; /* Avoid warning of dead store to |self|. */ \
+        _GTMDevAssert(NO, @"Invalid initializer."); \
+        return nil; \
+      } while (0)
+  #else
+    #define GTMInvalidateInitializer() \
+      do { \
+        [self release]; \
+        _GTMDevAssert(NO, @"Invalid initializer."); \
+        return nil; \
+      } while (0)
+  #endif
+#endif
+
+#ifndef GTMCFAutorelease
+  // GTMCFAutorelease returns an id.  In contrast, Apple's CFAutorelease returns
+  // a CFTypeRef.
+  #if __has_feature(objc_arc)
+    #define GTMCFAutorelease(x) CFBridgingRelease(x)
+  #else
+    #define GTMCFAutorelease(x) ([(id)x autorelease])
+  #endif
+#endif
+
+#ifdef __OBJC__
+
+
+// Macro to allow you to create NSStrings out of other macros.
+// #define FOO foo
+// NSString *fooString = GTM_NSSTRINGIFY(FOO);
+#if !defined (GTM_NSSTRINGIFY)
+  #define GTM_NSSTRINGIFY_INNER(x) @#x
+  #define GTM_NSSTRINGIFY(x) GTM_NSSTRINGIFY_INNER(x)
+#endif
+
+// Macro to allow fast enumeration when building for 10.5 or later, and
+// reliance on NSEnumerator for 10.4.  Remember, NSDictionary w/ FastEnumeration
+// does keys, so pick the right thing, nothing is done on the FastEnumeration
+// side to be sure you're getting what you wanted.
+#ifndef GTM_FOREACH_OBJECT
+  #if TARGET_OS_IPHONE || !(MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5)
+    #define GTM_FOREACH_ENUMEREE(element, enumeration) \
+      for (element in enumeration)
+    #define GTM_FOREACH_OBJECT(element, collection) \
+      for (element in collection)
+    #define GTM_FOREACH_KEY(element, collection) \
+      for (element in collection)
+  #else
+    #define GTM_FOREACH_ENUMEREE(element, enumeration) \
+      for (NSEnumerator *_ ## element ## _enum = enumeration; \
+           (element = [_ ## element ## _enum nextObject]) != nil; )
+    #define GTM_FOREACH_OBJECT(element, collection) \
+      GTM_FOREACH_ENUMEREE(element, [collection objectEnumerator])
+    #define GTM_FOREACH_KEY(element, collection) \
+      GTM_FOREACH_ENUMEREE(element, [collection keyEnumerator])
+  #endif
+#endif
+
+// ============================================================================
+
+// GTM_SEL_STRING is for specifying selector (usually property) names to KVC
+// or KVO methods.
+// In debug it will generate warnings for undeclared selectors if
+// -Wunknown-selector is turned on.
+// In release it will have no runtime overhead.
+#ifndef GTM_SEL_STRING
+  #ifdef DEBUG
+    #define GTM_SEL_STRING(selName) NSStringFromSelector(@selector(selName))
+  #else
+    #define GTM_SEL_STRING(selName) @#selName
+  #endif  // DEBUG
+#endif  // GTM_SEL_STRING
+
+#ifndef GTM_WEAK
+#if __has_feature(objc_arc_weak)
+    // With ARC enabled, __weak means a reference that isn't implicitly
+    // retained.  __weak objects are accessed through runtime functions, so
+    // they are zeroed out, but this requires OS X 10.7+.
+    // At clang r251041+, ARC-style zeroing weak references even work in
+    // non-ARC mode.
+    #define GTM_WEAK __weak
+  #elif __has_feature(objc_arc)
+    // ARC, but targeting 10.6 or older, where zeroing weak references don't
+    // exist.
+    #define GTM_WEAK __unsafe_unretained
+  #else
+    // With manual reference counting, __weak used to be silently ignored.
+    // clang r251041 gives it the ARC semantics instead.  This means they
+    // now require a deployment target of 10.7, while some clients of GTM
+    // still target 10.6.  In these cases, expand to __unsafe_unretained instead
+    #define GTM_WEAK
+  #endif
+#endif
+
+#endif  // __OBJC__
diff --git a/Example/Pods/GoogleToolboxForMac/LICENSE b/Example/Pods/GoogleToolboxForMac/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/Example/Pods/GoogleToolboxForMac/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
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+
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+
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+
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+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/Example/Pods/GoogleToolboxForMac/README.md b/Example/Pods/GoogleToolboxForMac/README.md
new file mode 100644
index 0000000..710560a
--- /dev/null
+++ b/Example/Pods/GoogleToolboxForMac/README.md
@@ -0,0 +1,15 @@
+# GTM: Google Toolbox for Mac #
+
+**Project site** <https://github.com/google/google-toolbox-for-mac><br>
+**Discussion group** <http://groups.google.com/group/google-toolbox-for-mac>
+
+# Google Toolbox for Mac #
+
+A collection of source from different Google projects that may be of use to
+developers working other iOS or OS X projects.
+
+If you find a problem/bug or want a new feature to be included in the Google
+Toolbox for Mac, please join the
+[discussion group](http://groups.google.com/group/google-toolbox-for-mac)
+or submit an
+[issue](https://github.com/google/google-toolbox-for-mac/issues).
diff --git a/Example/Pods/GoogleUtilities/Frameworks/GoogleUtilities.framework/GoogleUtilities b/Example/Pods/GoogleUtilities/Frameworks/GoogleUtilities.framework/GoogleUtilities
deleted file mode 100644
index 31efbac..0000000
Binary files a/Example/Pods/GoogleUtilities/Frameworks/GoogleUtilities.framework/GoogleUtilities and /dev/null differ
diff --git a/Example/Pods/Headers/Private/Firebase/Firebase.h b/Example/Pods/Headers/Private/Firebase/Firebase.h
index 68c38bb..6d62033 120000
--- a/Example/Pods/Headers/Private/Firebase/Firebase.h
+++ b/Example/Pods/Headers/Private/Firebase/Firebase.h
@@ -1 +1 @@
-../../../Firebase/Headers/Firebase.h
\ No newline at end of file
+../../../Firebase/Core/Sources/Firebase.h
\ No newline at end of file
diff --git a/Example/Pods/Headers/Private/FirebaseInstanceID/FIRInstanceID.h b/Example/Pods/Headers/Private/FirebaseInstanceID/FIRInstanceID.h
index 840c48c..0aaa73c 120000
--- a/Example/Pods/Headers/Private/FirebaseInstanceID/FIRInstanceID.h
+++ b/Example/Pods/Headers/Private/FirebaseInstanceID/FIRInstanceID.h
@@ -1 +1 @@
-../../../FirebaseInstanceID/Headers/Public/FIRInstanceID.h
\ No newline at end of file
+../../../FirebaseInstanceID/Sources/FIRInstanceID.h
\ No newline at end of file
diff --git a/Example/Pods/Headers/Public/Firebase/Firebase.h b/Example/Pods/Headers/Public/Firebase/Firebase.h
index 68c38bb..6d62033 120000
--- a/Example/Pods/Headers/Public/Firebase/Firebase.h
+++ b/Example/Pods/Headers/Public/Firebase/Firebase.h
@@ -1 +1 @@
-../../../Firebase/Headers/Firebase.h
\ No newline at end of file
+../../../Firebase/Core/Sources/Firebase.h
\ No newline at end of file
diff --git a/Example/Pods/Headers/Public/FirebaseInstanceID/FIRInstanceID.h b/Example/Pods/Headers/Public/FirebaseInstanceID/FIRInstanceID.h
index 840c48c..0aaa73c 120000
--- a/Example/Pods/Headers/Public/FirebaseInstanceID/FIRInstanceID.h
+++ b/Example/Pods/Headers/Public/FirebaseInstanceID/FIRInstanceID.h
@@ -1 +1 @@
-../../../FirebaseInstanceID/Headers/Public/FIRInstanceID.h
\ No newline at end of file
+../../../FirebaseInstanceID/Sources/FIRInstanceID.h
\ No newline at end of file
diff --git a/Example/Pods/Local Podspecs/RxFirebase.podspec.json b/Example/Pods/Local Podspecs/RxFirebase.podspec.json
index e459ed2..45aa043 100644
--- a/Example/Pods/Local Podspecs/RxFirebase.podspec.json	
+++ b/Example/Pods/Local Podspecs/RxFirebase.podspec.json	
@@ -2,7 +2,7 @@
   "name": "RxFirebase",
   "version": "0.1.0",
   "summary": "RxSwift Helpers for the New Firebase Libraries",
-  "description": "This is a library to help you use RxSwift 2.5 or higher with Firebase 3.0 or higher.",
+  "description": "This is a library to help you use RxSwift 3.0 or higher with Firebase 3.0 or higher.",
   "homepage": "https://github.com/RxSwiftCommunity/RxFirebase",
   "license": "MIT",
   "authors": {
@@ -17,22 +17,37 @@
     "ios": "8.0"
   },
   "source_files": "RxFirebase/Classes/**/*",
-  "frameworks": "UIKit",
   "dependencies": {
     "RxSwift": [
-      "~> 2.5"
+      "~> 3.0"
     ],
     "Firebase/Database": [
 
     ],
     "Firebase/Auth": [
 
+    ],
+    "Firebase/Analytics": [
+
+    ],
+    "Firebase/RemoteConfig": [
+
+    ],
+    "Firebase/Storage": [
+
     ]
   },
-  "xcconfig": {
-    "FRAMEWORK_SEARCH_PATHS": "'$(PODS_ROOT)/FirebaseDatabase'"
-  },
-  "vendored_frameworks": [
-    "${PODS_ROOT}/FirebaseDatabase/Frameworks/FirebaseDatabase.framework"
-  ]
+  "frameworks": [
+    "FirebaseCore",
+    "FirebaseDatabase",
+    "FirebaseAnalytics",
+    "FirebaseAuth",
+    "FirebaseRemoteConfig",
+    "FirebaseStorage",
+    "GoogleSymbolUtilities",
+    "GoogleInterchangeUtilities"
+  ],
+  "pod_target_xcconfig": {
+    "FRAMEWORK_SEARCH_PATHS": "$(PODS_ROOT)/FirebaseCore/Frameworks $(PODS_ROOT)/FirebaseCore/Frameworks/frameworks $(PODS_ROOT)/FirebaseDatabase/Frameworks $(PODS_ROOT)/FirebaseDatabase/Frameworks/frameworks $(PODS_ROOT)/FirebaseAnalytics/Frameworks $(PODS_ROOT)/FirebaseAnalytics/Frameworks/frameworks $(PODS_ROOT)/FirebaseAuth/Frameworks $(PODS_ROOT)/FirebaseAuth/Frameworks/frameworks $(PODS_ROOT)/FirebaseRemoteConfig/Frameworks $(PODS_ROOT)/FirebaseRemoteConfig/Frameworks/frameworks $(PODS_ROOT)/FirebaseStorage/Frameworks $(PODS_ROOT)/FirebaseStorage/Frameworks/frameworks $(PODS_ROOT)/GoogleSymbolUtilities/Frameworks $(PODS_ROOT)/GoogleSymbolUtilities/Frameworks/frameworks $(PODS_ROOT)/GoogleInterchangeUtilities/Frameworks $(PODS_ROOT)/GoogleInterchangeUtilities/Frameworks/frameworks"
+  }
 }
diff --git a/Example/Pods/Manifest.lock b/Example/Pods/Manifest.lock
index 04feabe..9194449 100644
--- a/Example/Pods/Manifest.lock
+++ b/Example/Pods/Manifest.lock
@@ -1,57 +1,92 @@
 PODS:
-  - Firebase/Analytics (3.2.0):
-    - FirebaseAnalytics (= 3.2.0)
-  - Firebase/Auth (3.2.0):
-    - Firebase/Analytics (= 3.2.0)
-    - FirebaseAuth (= 3.0.2)
-  - Firebase/Database (3.2.0):
-    - Firebase/Analytics (= 3.2.0)
-    - FirebaseDatabase (= 3.0.1)
-  - FirebaseAnalytics (3.2.0):
+  - Firebase/Analytics (3.10.0):
+    - Firebase/Core
+  - Firebase/Auth (3.10.0):
+    - Firebase/Core
+    - FirebaseAuth (= 3.0.6)
+  - Firebase/Core (3.10.0):
+    - FirebaseAnalytics (= 3.6.0)
+    - FirebaseCore (= 3.4.5)
+  - Firebase/Database (3.10.0):
+    - Firebase/Core
+    - FirebaseDatabase (= 3.1.1)
+  - Firebase/RemoteConfig (3.10.0):
+    - Firebase/Core
+    - FirebaseRemoteConfig (= 1.3.1)
+  - Firebase/Storage (3.10.0):
+    - Firebase/Core
+    - FirebaseStorage (= 1.0.5)
+  - FirebaseAnalytics (3.6.0):
+    - FirebaseCore (~> 3.4)
     - FirebaseInstanceID (~> 1.0)
     - GoogleInterchangeUtilities (~> 1.2)
     - GoogleSymbolUtilities (~> 1.1)
-    - GoogleUtilities (~> 1.3)
-  - FirebaseAuth (3.0.2):
-    - FirebaseAnalytics (~> 3.2)
-    - GoogleNetworkingUtilities (~> 1.2)
-    - GoogleUtilities (~> 1.3)
-  - FirebaseDatabase (3.0.1):
-    - FirebaseAnalytics (~> 3.2)
-  - FirebaseInstanceID (1.0.6)
-  - GoogleInterchangeUtilities (1.2.1):
-    - GoogleSymbolUtilities (~> 1.0)
-  - GoogleNetworkingUtilities (1.2.1):
-    - GoogleSymbolUtilities (~> 1.0)
-  - GoogleSymbolUtilities (1.1.1)
-  - GoogleUtilities (1.3.1):
-    - GoogleSymbolUtilities (~> 1.0)
+    - GoogleToolboxForMac/NSData+zlib (~> 2.1)
+  - FirebaseAuth (3.0.6):
+    - FirebaseAnalytics (~> 3.4)
+    - GoogleToolboxForMac/NSDictionary+URLArguments (~> 2.1)
+    - GTMSessionFetcher/Core (~> 1.1)
+  - FirebaseCore (3.4.5):
+    - GoogleInterchangeUtilities (~> 1.2)
+    - GoogleToolboxForMac/NSData+zlib (~> 2.1)
+  - FirebaseDatabase (3.1.1):
+    - FirebaseAnalytics (~> 3.5)
+  - FirebaseInstanceID (1.0.8)
+  - FirebaseRemoteConfig (1.3.1):
+    - FirebaseAnalytics (~> 3.4)
+    - FirebaseInstanceID (~> 1.0)
+    - GoogleInterchangeUtilities (~> 1.2)
+    - GoogleSymbolUtilities (~> 1.1)
+    - GoogleToolboxForMac/NSData+zlib (~> 2.1)
+  - FirebaseStorage (1.0.5):
+    - FirebaseAnalytics (~> 3.5)
+    - GTMSessionFetcher/Core (~> 1.1)
+  - GoogleInterchangeUtilities (1.2.2):
+    - GoogleSymbolUtilities (~> 1.1)
+  - GoogleSymbolUtilities (1.1.2)
+  - GoogleToolboxForMac/DebugUtils (2.1.0):
+    - GoogleToolboxForMac/Defines (= 2.1.0)
+  - GoogleToolboxForMac/Defines (2.1.0)
+  - GoogleToolboxForMac/NSData+zlib (2.1.0):
+    - GoogleToolboxForMac/Defines (= 2.1.0)
+  - GoogleToolboxForMac/NSDictionary+URLArguments (2.1.0):
+    - GoogleToolboxForMac/DebugUtils (= 2.1.0)
+    - GoogleToolboxForMac/Defines (= 2.1.0)
+    - GoogleToolboxForMac/NSString+URLArguments (= 2.1.0)
+  - GoogleToolboxForMac/NSString+URLArguments (2.1.0)
+  - GTMSessionFetcher/Core (1.1.7)
   - RxFirebase (0.1.0):
+    - Firebase/Analytics
     - Firebase/Auth
     - Firebase/Database
-    - RxSwift (~> 2.5)
-  - RxSwift (2.5.0)
+    - Firebase/RemoteConfig
+    - Firebase/Storage
+    - RxSwift (~> 3.0)
+  - RxSwift (3.0.1)
 
 DEPENDENCIES:
   - RxFirebase (from `../`)
 
 EXTERNAL SOURCES:
   RxFirebase:
-    :path: ../
+    :path: "../"
 
 SPEC CHECKSUMS:
-  Firebase: 6d4012da1598732a2b43f16d8355eca90f94ed59
-  FirebaseAnalytics: 6f75b04e6bfb8e0b6e9ef298e04c24eea3b13863
-  FirebaseAuth: 94b851fc345ce98036dfedfdc2eddeaef8fa3b4c
-  FirebaseDatabase: 34301d11621a83546f39f670d256477ba6f7fcea
-  FirebaseInstanceID: d014d574053a2fe84478f12f7bae96979e7051bb
-  GoogleInterchangeUtilities: def8415a862effc67d549d5b5b0b9c7a2f97d4de
-  GoogleNetworkingUtilities: 3e83269048cfb498dc7ec83ab36813360965c74f
-  GoogleSymbolUtilities: 33117db1b5f290c6fbf259585e4885b4c84b98d7
-  GoogleUtilities: 56c5ac05b7aa5dc417a1bb85221a9516e04d7032
-  RxFirebase: 59cfda204203de3c4cd0ee26b5f290990e66e32f
-  RxSwift: 402b41a50e922a0368fc14cb3bc9f4427920e8ae
+  Firebase: 387f37c7dca894a02708da9ff35ba147040eae9e
+  FirebaseAnalytics: 9c67af0ebeb8d2146c9b4ea2616439affa947b58
+  FirebaseAuth: 96e9674ff31d6e1f826d53e26aa003a57cab0295
+  FirebaseCore: 1e383fdfe37b6b5d6ff88e84204bdee30276af0f
+  FirebaseDatabase: 6de92187481ff0e8e124064f21742e95ee883b02
+  FirebaseInstanceID: ba1e640935235e5fac39dfa816fe7660e72e1a8a
+  FirebaseRemoteConfig: 383a9afe0a9291ada949e3f615257928a823b594
+  FirebaseStorage: 5738284835edb57f0e81d4ae5832bb17c1e4b5fa
+  GoogleInterchangeUtilities: d5bc4d88d5b661ab72f9d70c58d02ca8c27ad1f7
+  GoogleSymbolUtilities: 631ee17048aa5e9ab133470d768ea997a5ef9b96
+  GoogleToolboxForMac: 2b2596cbb7186865e98cadf2b1e262d851c2b168
+  GTMSessionFetcher: a1f8ed39e4fe21c68957daed472c7afbcdf29166
+  RxFirebase: bbd00c18cdc11c573889ee17be00840c82756c4d
+  RxSwift: af5680055c4ad04480189c52d28385b1029493a6
 
 PODFILE CHECKSUM: 7055416547896e7d460aa0056157b9aecb7d6deb
 
-COCOAPODS: 1.0.0
+COCOAPODS: 1.1.1
diff --git a/Example/Pods/Pods.xcodeproj/project.pbxproj b/Example/Pods/Pods.xcodeproj/project.pbxproj
index 3dbb039..a75da5f 100644
--- a/Example/Pods/Pods.xcodeproj/project.pbxproj
+++ b/Example/Pods/Pods.xcodeproj/project.pbxproj
@@ -7,591 +7,572 @@
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+				DYLIB_COMPATIBILITY_VERSION = 1;
+				DYLIB_CURRENT_VERSION = 1;
+				DYLIB_INSTALL_NAME_BASE = "@rpath";
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_NO_COMMON_BLOCKS = YES;
+				INFOPLIST_FILE = "Target Support Files/Pods-RxFirebase_Tests/Info.plist";
+				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				IPHONEOS_DEPLOYMENT_TARGET = 8.3;
-				ONLY_ACTIVE_ARCH = YES;
-				STRIP_INSTALLED_PRODUCT = NO;
-				SYMROOT = "${SRCROOT}/../build";
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				MACH_O_TYPE = staticlib;
+				MODULEMAP_FILE = "Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests.modulemap";
+				MTL_ENABLE_DEBUG_INFO = YES;
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+				PODS_ROOT = "$(SRCROOT)";
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+				SDKROOT = iphoneos;
+				SKIP_INSTALL = YES;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				VERSIONING_SYSTEM = "apple-generic";
+				VERSION_INFO_PREFIX = "";
+			};
+			name = Debug;
+		};
+		F0E0C90B39CF6A1A1C22F2D0C7613A3E /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = EE6C521E0B6407367471F99624A34E2C /* GoogleToolboxForMac.xcconfig */;
+			buildSettings = {
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+				DYLIB_COMPATIBILITY_VERSION = 1;
+				DYLIB_CURRENT_VERSION = 1;
+				DYLIB_INSTALL_NAME_BASE = "@rpath";
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_PREFIX_HEADER = "Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac-prefix.pch";
+				INFOPLIST_FILE = "Target Support Files/GoogleToolboxForMac/Info.plist";
+				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				MODULEMAP_FILE = "Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac.modulemap";
+				MTL_ENABLE_DEBUG_INFO = YES;
+				PRODUCT_NAME = GoogleToolboxForMac;
+				SDKROOT = iphoneos;
+				SKIP_INSTALL = YES;
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+				TARGETED_DEVICE_FAMILY = "1,2";
+				VERSIONING_SYSTEM = "apple-generic";
+				VERSION_INFO_PREFIX = "";
+			};
+			name = Debug;
+		};
+		F17CEB38215AD45DAAFC2697BF350E79 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 4E2329D5CFB5079402B93807B004DD35 /* RxSwift.xcconfig */;
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+				DYLIB_INSTALL_NAME_BASE = "@rpath";
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_PREFIX_HEADER = "Target Support Files/RxSwift/RxSwift-prefix.pch";
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+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
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+				MODULEMAP_FILE = "Target Support Files/RxSwift/RxSwift.modulemap";
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+				SKIP_INSTALL = YES;
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+				TARGETED_DEVICE_FAMILY = "1,2";
+				VERSIONING_SYSTEM = "apple-generic";
+				VERSION_INFO_PREFIX = "";
 			};
 			name = Debug;
 		};
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
-		03E99FB259E417DBAE385035F5AD59B3 /* Build configuration list for PBXNativeTarget "RxSwift" */ = {
+		2D8E8EC45A3A1A1D94AE762CB5028504 /* Build configuration list for PBXProject "Pods" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
-				585F9E8C2D4CF27DDB85A489767CCF27 /* Debug */,
-				B4BE046A3FB35FA58473A7DE99F7C5CA /* Release */,
+				9E1E4E48AF2EAB23169E611BF694090A /* Debug */,
+				8DED8AD26D381A6ACFF202E5217EC498 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
-		2D8E8EC45A3A1A1D94AE762CB5028504 /* Build configuration list for PBXProject "Pods" */ = {
+		39514D36BDF9D63FD9FD9A066F19465F /* Build configuration list for PBXNativeTarget "GTMSessionFetcher" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				AE3E7BA851D315FC121F0635A31DA092 /* Debug */,
+				A6F81986C249E88C23E1E7A6E4339F9D /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		48CD711A093EB1AF23F4E13DF4740C08 /* Build configuration list for PBXNativeTarget "RxFirebase" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				6BD4D0D7F9C4D1A5A0D53AC25234684B /* Debug */,
+				5D444C2CDE62D439CB0D0FAA3BEA317D /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		4AEBB187FDCC7C53ECD2FC0EA27EB970 /* Build configuration list for PBXNativeTarget "GoogleToolboxForMac" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
-				D3E3D092A3FF7311A98E44BBA36FFD12 /* Debug */,
-				0ACDCBCB0B6796575F46FFA2F5410C6B /* Release */,
+				F0E0C90B39CF6A1A1C22F2D0C7613A3E /* Debug */,
+				AF98B9486F5EBA52F1B613EA789A52D5 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
@@ -1575,26 +2157,26 @@
 		68E28B143FB833B9C12522B5AC830622 /* Build configuration list for PBXNativeTarget "Pods-RxFirebase_Tests" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
-				6B9A5659DAA6ECC8447CB18B9862B6BB /* Debug */,
-				6680E891C7471EE7E24AB282E27F22D5 /* Release */,
+				EF565F70433248EAAF4A8B9C95D301FC /* Debug */,
+				6A1A2DBD56FB11D42C61FC98DC3AAE61 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
-		C380E3BCB4454BFC1BFA2CB7530F0968 /* Build configuration list for PBXNativeTarget "Pods-RxFirebase_Example" */ = {
+		8697AEC0D1296647EA71F340A77E8024 /* Build configuration list for PBXNativeTarget "RxSwift" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
-				9DA7A048F81F8436025124D6F828A9B3 /* Debug */,
-				BA540F59A6975F02973416B03CA9C63E /* Release */,
+				F17CEB38215AD45DAAFC2697BF350E79 /* Debug */,
+				543095A868B8703452FE9D9D3DFBDC71 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
-		C6E7D8D72EDA34B280C5243E51D40674 /* Build configuration list for PBXNativeTarget "RxFirebase" */ = {
+		E7EBCAB61F972856410F0558F42F5822 /* Build configuration list for PBXNativeTarget "Pods-RxFirebase_Example" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
-				6D69B2AA81075000C1C0086E26F5B169 /* Debug */,
-				9A81B665B871A6B87AD3B75DEA95C533 /* Release */,
+				79312024F4A1E200C3FF075A8AFE4AC4 /* Debug */,
+				CF3736E76D0676B0DA833C9911BFC8BD /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
diff --git a/Example/Pods/Pods.xcodeproj/project.xcworkspace/contents.xcworkspacedata b/Example/Pods/Pods.xcodeproj/project.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..919434a
--- /dev/null
+++ b/Example/Pods/Pods.xcodeproj/project.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>
diff --git a/Example/Pods/RxSwift/Platform/DataStructures/Bag.swift b/Example/Pods/RxSwift/Platform/DataStructures/Bag.swift
new file mode 100644
index 0000000..4ab6f94
--- /dev/null
+++ b/Example/Pods/RxSwift/Platform/DataStructures/Bag.swift
@@ -0,0 +1,167 @@
+//
+//  Bag.swift
+//  Platform
+//
+//  Created by Krunoslav Zaher on 2/28/15.
+//  Copyright © 2015 Krunoslav Zaher. All rights reserved.
+//
+
+import Foundation
+import Swift
+
+let arrayDictionaryMaxSize = 30
+
+struct BagKey {
+    /**
+    Unique identifier for object added to `Bag`.
+     
+    It's underlying type is UInt64. If we assume there in an idealized CPU that works at 4GHz,
+     it would take ~150 years of continuous running time for it to overflow.
+    */
+    fileprivate let rawValue: UInt64
+}
+
+/**
+Data structure that represents a bag of elements typed `T`.
+
+Single element can be stored multiple times.
+
+Time and space complexity of insertion an deletion is O(n). 
+
+It is suitable for storing small number of elements.
+*/
+struct Bag<T> : CustomDebugStringConvertible {
+    /// Type of identifier for inserted elements.
+    typealias KeyType = BagKey
+    
+    typealias Entry = (key: BagKey, value: T)
+ 
+    fileprivate var _nextKey: BagKey = BagKey(rawValue: 0)
+
+    // data
+
+    // first fill inline variables
+    var _key0: BagKey? = nil
+    var _value0: T? = nil
+
+    // last is sparse dictionary
+    var _dictionary: [BagKey : T]? = nil
+
+    var _onlyFastPath = true
+
+    /// Creates new empty `Bag`.
+    init() {
+    }
+    
+    /**
+    Inserts `value` into bag.
+    
+    - parameter element: Element to insert.
+    - returns: Key that can be used to remove element from bag.
+    */
+    mutating func insert(_ element: T) -> BagKey {
+        let key = _nextKey
+
+        _nextKey = BagKey(rawValue: _nextKey.rawValue &+ 1)
+
+        if _key0 == nil {
+            _key0 = key
+            _value0 = element
+            return key
+        }
+
+        _onlyFastPath = false
+
+        if _dictionary != nil {
+            _dictionary![key] = element
+            return key
+        }
+
+        if _dictionary == nil {
+            _dictionary = [:]
+        }
+
+        _dictionary![key] = element
+        
+        return key
+    }
+    
+    /// - returns: Number of elements in bag.
+    var count: Int {
+        let dictionaryCount: Int = _dictionary?.count ?? 0
+        return (_value0 != nil ? 1 : 0) + dictionaryCount
+    }
+    
+    /// Removes all elements from bag and clears capacity.
+    mutating func removeAll() {
+        _key0 = nil
+        _value0 = nil
+
+        _dictionary?.removeAll(keepingCapacity: false)
+    }
+    
+    /**
+    Removes element with a specific `key` from bag.
+    
+    - parameter key: Key that identifies element to remove from bag.
+    - returns: Element that bag contained, or nil in case element was already removed.
+    */
+    mutating func removeKey(_ key: BagKey) -> T? {
+        if _key0 == key {
+            _key0 = nil
+            let value = _value0!
+            _value0 = nil
+            return value
+        }
+
+        if let existingObject = _dictionary?.removeValue(forKey: key) {
+            return existingObject
+        }
+
+        return nil
+    }
+}
+
+extension Bag {
+    /// A textual representation of `self`, suitable for debugging.
+    var debugDescription : String {
+        return "\(self.count) elements in Bag"
+    }
+}
+
+extension Bag {
+    /// Enumerates elements inside the bag.
+    ///
+    /// - parameter action: Enumeration closure.
+    func forEach(_ action: (T) -> Void) {
+        if _onlyFastPath {
+            if let value0 = _value0 {
+                action(value0)
+            }
+            return
+        }
+
+        let value0 = _value0
+        let dictionary = _dictionary
+
+        if let value0 = value0 {
+            action(value0)
+        }
+
+        if dictionary?.count ?? 0 > 0 {
+            for element in dictionary!.values {
+                action(element)
+            }
+        }
+    }
+}
+
+extension BagKey: Hashable {
+    var hashValue: Int {
+        return rawValue.hashValue
+    }
+}
+
+func ==(lhs: BagKey, rhs: BagKey) -> Bool {
+    return lhs.rawValue == rhs.rawValue
+}
diff --git a/Example/Pods/RxSwift/RxSwift/DataStructures/InfiniteSequence.swift b/Example/Pods/RxSwift/Platform/DataStructures/InfiniteSequence.swift
similarity index 62%
rename from Example/Pods/RxSwift/RxSwift/DataStructures/InfiniteSequence.swift
rename to Example/Pods/RxSwift/Platform/DataStructures/InfiniteSequence.swift
index a594bb5..5fad383 100644
--- a/Example/Pods/RxSwift/RxSwift/DataStructures/InfiniteSequence.swift
+++ b/Example/Pods/RxSwift/Platform/DataStructures/InfiniteSequence.swift
@@ -1,6 +1,6 @@
 //
 //  InfiniteSequence.swift
-//  RxSwift
+//  Platform
 //
 //  Created by Krunoslav Zaher on 6/13/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,12 +8,10 @@
 
 import Foundation
 
-/**
-Sequence that repeats `repeatedValue` infinite number of times.
-*/
-struct InfiniteSequence<E> : SequenceType {
+/// Sequence that repeats `repeatedValue` infinite number of times.
+struct InfiniteSequence<E> : Sequence {
     typealias Element = E
-    typealias Generator = AnyGenerator<E>
+    typealias Iterator = AnyIterator<E>
     
     private let _repeatedValue: E
     
@@ -21,10 +19,10 @@ struct InfiniteSequence<E> : SequenceType {
         _repeatedValue = repeatedValue
     }
     
-    func generate() -> Generator {
+    func makeIterator() -> Iterator {
         let repeatedValue = _repeatedValue
-        return AnyGenerator {
+        return AnyIterator {
             return repeatedValue
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/DataStructures/PriorityQueue.swift b/Example/Pods/RxSwift/Platform/DataStructures/PriorityQueue.swift
similarity index 66%
rename from Example/Pods/RxSwift/RxSwift/DataStructures/PriorityQueue.swift
rename to Example/Pods/RxSwift/Platform/DataStructures/PriorityQueue.swift
index efbd546..725feef 100644
--- a/Example/Pods/RxSwift/RxSwift/DataStructures/PriorityQueue.swift
+++ b/Example/Pods/RxSwift/Platform/DataStructures/PriorityQueue.swift
@@ -1,6 +1,6 @@
 //
 //  PriorityQueue.swift
-//  Rx
+//  Platform
 //
 //  Created by Krunoslav Zaher on 12/27/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,15 +8,18 @@
 
 import Foundation
 
-struct PriorityQueue<Element: AnyObject> {
+struct PriorityQueue<Element> {
     private let _hasHigherPriority: (Element, Element) -> Bool
-    private var _elements = [Element]()
+    private let _isEqual: (Element, Element) -> Bool
 
-    init(hasHigherPriority: (Element, Element) -> Bool) {
+    fileprivate var _elements = [Element]()
+
+    init(hasHigherPriority: @escaping (Element, Element) -> Bool, isEqual: @escaping (Element, Element) -> Bool) {
         _hasHigherPriority = hasHigherPriority
+        _isEqual = isEqual
     }
 
-    mutating func enqueue(element: Element) {
+    mutating func enqueue(_ element: Element) {
         _elements.append(element)
         bubbleToHigherPriority(_elements.count - 1)
     }
@@ -39,22 +42,22 @@ struct PriorityQueue<Element: AnyObject> {
         return front
     }
 
-    mutating func remove(element: Element) {
+    mutating func remove(_ element: Element) {
         for i in 0 ..< _elements.count {
-            if _elements[i] === element {
+            if _isEqual(_elements[i], element) {
                 removeAt(i)
                 return
             }
         }
     }
 
-    private mutating func removeAt(index: Int) {
+    private mutating func removeAt(_ index: Int) {
         let removingLast = index == _elements.count - 1
         if !removingLast {
             swap(&_elements[index], &_elements[_elements.count - 1])
         }
 
-        _elements.popLast()
+        _ = _elements.popLast()
 
         if !removingLast {
             bubbleToHigherPriority(index)
@@ -62,7 +65,7 @@ struct PriorityQueue<Element: AnyObject> {
         }
     }
 
-    private mutating func bubbleToHigherPriority(initialUnbalancedIndex: Int) {
+    private mutating func bubbleToHigherPriority(_ initialUnbalancedIndex: Int) {
         precondition(initialUnbalancedIndex >= 0)
         precondition(initialUnbalancedIndex < _elements.count)
 
@@ -70,24 +73,19 @@ struct PriorityQueue<Element: AnyObject> {
 
         while unbalancedIndex > 0 {
             let parentIndex = (unbalancedIndex - 1) / 2
-
-            if _hasHigherPriority(_elements[unbalancedIndex], _elements[parentIndex]) {
-                swap(&_elements[unbalancedIndex], &_elements[parentIndex])
-
-                unbalancedIndex = parentIndex
-            }
-            else {
-                break
-            }
+            guard _hasHigherPriority(_elements[unbalancedIndex], _elements[parentIndex]) else { break }
+            
+            swap(&_elements[unbalancedIndex], &_elements[parentIndex])
+            unbalancedIndex = parentIndex
         }
     }
 
-    private mutating func bubbleToLowerPriority(initialUnbalancedIndex: Int) {
+    private mutating func bubbleToLowerPriority(_ initialUnbalancedIndex: Int) {
         precondition(initialUnbalancedIndex >= 0)
         precondition(initialUnbalancedIndex < _elements.count)
 
         var unbalancedIndex = initialUnbalancedIndex
-        repeat {
+        while true {
             let leftChildIndex = unbalancedIndex * 2 + 1
             let rightChildIndex = unbalancedIndex * 2 + 2
 
@@ -101,15 +99,11 @@ struct PriorityQueue<Element: AnyObject> {
                 highestPriorityIndex = rightChildIndex
             }
 
-            if highestPriorityIndex != unbalancedIndex {
-                swap(&_elements[highestPriorityIndex], &_elements[unbalancedIndex])
+            guard highestPriorityIndex != unbalancedIndex else { break }
 
-                unbalancedIndex = highestPriorityIndex
-            }
-            else {
-                break
-            }
-        } while true
+            swap(&_elements[highestPriorityIndex], &_elements[unbalancedIndex])
+            unbalancedIndex = highestPriorityIndex
+        }
     }
 }
 
@@ -117,4 +111,4 @@ extension PriorityQueue : CustomDebugStringConvertible {
     var debugDescription: String {
         return _elements.debugDescription
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/DataStructures/Queue.swift b/Example/Pods/RxSwift/Platform/DataStructures/Queue.swift
similarity index 70%
rename from Example/Pods/RxSwift/RxSwift/DataStructures/Queue.swift
rename to Example/Pods/RxSwift/Platform/DataStructures/Queue.swift
index 50bc7f5..cfe3df4 100644
--- a/Example/Pods/RxSwift/RxSwift/DataStructures/Queue.swift
+++ b/Example/Pods/RxSwift/Platform/DataStructures/Queue.swift
@@ -1,6 +1,6 @@
 //
 //  Queue.swift
-//  Rx
+//  Platform
 //
 //  Created by Krunoslav Zaher on 3/21/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -16,28 +16,26 @@ averaged over N operations.
 
 Complexity of `peek` is O(1).
 */
-public struct Queue<T>: SequenceType {
-    /**
-    Type of generator.
-    */
-    public typealias Generator = AnyGenerator<T>
-    
+struct Queue<T>: Sequence {
+    /// Type of generator.
+    typealias Generator = AnyIterator<T>
+
     private let _resizeFactor = 2
     
     private var _storage: ContiguousArray<T?>
     private var _count = 0
     private var _pushNextIndex = 0
-    private var _initialCapacity: Int
+    private let _initialCapacity: Int
 
     /**
     Creates new queue.
     
     - parameter capacity: Capacity of newly created queue.
     */
-    public init(capacity: Int) {
+    init(capacity: Int) {
         _initialCapacity = capacity
 
-        _storage = ContiguousArray<T?>(count: capacity, repeatedValue: nil)
+        _storage = ContiguousArray<T?>(repeating: nil, count: capacity)
     }
     
     private var dequeueIndex: Int {
@@ -45,31 +43,25 @@ public struct Queue<T>: SequenceType {
         return index < 0 ? index + _storage.count : index
     }
     
-    /**
-    - returns: Is queue empty.
-    */
-    public var isEmpty: Bool {
+    /// - returns: Is queue empty.
+    var isEmpty: Bool {
         return count == 0
     }
     
-    /**
-    - returns: Number of elements inside queue.
-    */
-    public var count: Int {
+    /// - returns: Number of elements inside queue.
+    var count: Int {
         return _count
     }
     
-    /**
-    - returns: Element in front of a list of elements to `dequeue`.
-    */
-    public func peek() -> T {
+    /// - returns: Element in front of a list of elements to `dequeue`.
+    func peek() -> T {
         precondition(count > 0)
         
         return _storage[dequeueIndex]!
     }
     
-    mutating private func resizeTo(size: Int) {
-        var newStorage = ContiguousArray<T?>(count: size, repeatedValue: nil)
+    mutating private func resizeTo(_ size: Int) {
+        var newStorage = ContiguousArray<T?>(repeating: nil, count: size)
         
         let count = _count
         
@@ -77,7 +69,7 @@ public struct Queue<T>: SequenceType {
         let spaceToEndOfQueue = _storage.count - dequeueIndex
         
         // first batch is from dequeue index to end of array
-        let countElementsInFirstBatch = min(count, spaceToEndOfQueue)
+        let countElementsInFirstBatch = Swift.min(count, spaceToEndOfQueue)
         // second batch is wrapped from start of array to end of queue
         let numberOfElementsInSecondBatch = count - countElementsInFirstBatch
         
@@ -89,14 +81,12 @@ public struct Queue<T>: SequenceType {
         _storage = newStorage
     }
     
-    /**
-    Enqueues `element`.
-    
-    - parameter element: Element to enqueue.
-    */
-    public mutating func enqueue(element: T) {
+    /// Enqueues `element`.
+    ///
+    /// - parameter element: Element to enqueue.
+    mutating func enqueue(_ element: T) {
         if count == _storage.count {
-            resizeTo(max(_storage.count, 1) * _resizeFactor)
+            resizeTo(Swift.max(_storage.count, 1) * _resizeFactor)
         }
         
         _storage[_pushNextIndex] = element
@@ -121,12 +111,10 @@ public struct Queue<T>: SequenceType {
         return _storage[index]!
     }
 
-    /**
-    Dequeues element or throws an exception in case queue is empty.
-    
-    - returns: Dequeued element.
-    */
-    public mutating func dequeue() -> T? {
+    /// Dequeues element or throws an exception in case queue is empty.
+    ///
+    /// - returns: Dequeued element.
+    mutating func dequeue() -> T? {
         if self.count == 0 {
             return nil
         }
@@ -141,14 +129,12 @@ public struct Queue<T>: SequenceType {
         return dequeueElementOnly()
     }
     
-    /**
-    - returns: Generator of contained elements.
-    */
-    public func generate() -> Generator {
+    /// - returns: Generator of contained elements.
+    func makeIterator() -> AnyIterator<T> {
         var i = dequeueIndex
         var count = _count
 
-        return AnyGenerator {
+        return AnyIterator {
             if count == 0 {
                 return nil
             }
diff --git a/Example/Pods/RxSwift/Platform/DispatchQueue+Extensions.swift b/Example/Pods/RxSwift/Platform/DispatchQueue+Extensions.swift
new file mode 100644
index 0000000..0df1ce7
--- /dev/null
+++ b/Example/Pods/RxSwift/Platform/DispatchQueue+Extensions.swift
@@ -0,0 +1,22 @@
+//
+//  DispatchQueue+Extensions.swift
+//  Platform
+//
+//  Created by Krunoslav Zaher on 10/22/16.
+//  Copyright © 2016 Krunoslav Zaher. All rights reserved.
+//
+
+import Foundation
+import Dispatch
+
+extension DispatchQueue {
+    private static var token: DispatchSpecificKey<()> = {
+        let key = DispatchSpecificKey<()>()
+        DispatchQueue.main.setSpecific(key: key, value: ())
+        return key
+    }()
+
+    static var isMain: Bool {
+        return DispatchQueue.getSpecific(key: token) != nil
+    }
+}
diff --git a/Example/Pods/RxSwift/Platform/Platform.Darwin.swift b/Example/Pods/RxSwift/Platform/Platform.Darwin.swift
new file mode 100644
index 0000000..e0d7f0d
--- /dev/null
+++ b/Example/Pods/RxSwift/Platform/Platform.Darwin.swift
@@ -0,0 +1,49 @@
+//
+//  Platform.Darwin.swift
+//  Platform
+//
+//  Created by Krunoslav Zaher on 12/29/15.
+//  Copyright © 2015 Krunoslav Zaher. All rights reserved.
+//
+
+#if os(macOS) || os(iOS) || os(tvOS) || os(watchOS)
+
+    import Darwin
+    import Foundation
+
+    typealias AtomicInt = Int32
+
+    let AtomicCompareAndSwap = OSAtomicCompareAndSwap32Barrier
+    let AtomicIncrement = OSAtomicIncrement32Barrier
+    let AtomicDecrement = OSAtomicDecrement32Barrier
+
+    extension Thread {
+
+        static func setThreadLocalStorageValue<T: AnyObject>(_ value: T?, forKey key: String
+            ) {
+            let currentThread = Thread.current
+            let threadDictionary = currentThread.threadDictionary
+
+            if let newValue = value {
+                threadDictionary[key] = newValue
+            }
+            else {
+                threadDictionary[key] = nil
+            }
+
+        }
+        static func getThreadLocalStorageValueForKey<T>(_ key: String) -> T? {
+            let currentThread = Thread.current
+            let threadDictionary = currentThread.threadDictionary
+            
+            return threadDictionary[key] as? T
+        }
+    }
+
+    extension AtomicInt {
+        func valueSnapshot() -> Int32 {
+            return self
+        }
+    }
+    
+#endif
diff --git a/Example/Pods/RxSwift/Platform/Platform.Linux.swift b/Example/Pods/RxSwift/Platform/Platform.Linux.swift
new file mode 100644
index 0000000..ae5a49d
--- /dev/null
+++ b/Example/Pods/RxSwift/Platform/Platform.Linux.swift
@@ -0,0 +1,97 @@
+//
+//  Platform.Linux.swift
+//  Platform
+//
+//  Created by Krunoslav Zaher on 12/29/15.
+//  Copyright © 2015 Krunoslav Zaher. All rights reserved.
+//
+
+#if os(Linux)
+    ////////////////////////////////////////////////////////////////////////////////
+    // This is not the greatest API in the world, this is just a tribute.
+    // !!! Proof of concept until libdispatch becomes operational. !!!
+    ////////////////////////////////////////////////////////////////////////////////
+
+    import Foundation
+    import XCTest
+    import Glibc
+    import SwiftShims
+
+    final class AtomicInt {
+        typealias IntegerLiteralType = Int
+        fileprivate var value: Int32 = 0
+        fileprivate var _lock = NSRecursiveLock()
+
+        func lock() {
+          _lock.lock()
+        }
+        func unlock() {
+          _lock.unlock()
+        }
+
+        func valueSnapshot() -> Int32 {
+            return value
+        }
+    }
+
+    extension AtomicInt: ExpressibleByIntegerLiteral {
+        convenience init(integerLiteral value: Int) {
+            self.init()
+            self.value = Int32(value)
+        }
+    }
+    
+    func >(lhs: AtomicInt, rhs: Int32) -> Bool {
+        return lhs.value > rhs
+    }
+    func ==(lhs: AtomicInt, rhs: Int32) -> Bool {
+        return lhs.value == rhs
+    }
+
+    func AtomicIncrement(_ atomic: inout AtomicInt) -> Int32 {
+        atomic.lock(); defer { atomic.unlock() }
+        atomic.value += 1
+        return atomic.value
+    }
+
+    func AtomicDecrement(_ atomic: inout AtomicInt) -> Int32 {
+        atomic.lock(); defer { atomic.unlock() }
+        atomic.value -= 1
+        return atomic.value
+    }
+
+    func AtomicCompareAndSwap(_ l: Int32, _ r: Int32, _ atomic: inout AtomicInt) -> Bool {
+        atomic.lock(); defer { atomic.unlock() }
+        if atomic.value == l {
+            atomic.value = r
+            return true
+        }
+
+        return false
+    }
+
+    extension Thread {
+
+        static func setThreadLocalStorageValue<T: AnyObject>(_ value: T?, forKey key: String) {
+            let currentThread = Thread.current
+            var threadDictionary = currentThread.threadDictionary
+
+            if let newValue = value {
+                threadDictionary[key] = newValue
+            }
+            else {
+                threadDictionary[key] = nil
+            }
+
+            currentThread.threadDictionary = threadDictionary
+        }
+
+        static func getThreadLocalStorageValueForKey<T: AnyObject>(_ key: String) -> T? {
+            let currentThread = Thread.current
+            let threadDictionary = currentThread.threadDictionary
+
+            return threadDictionary[key] as? T
+        }
+    }
+
+#endif
diff --git a/Example/Pods/RxSwift/README.md b/Example/Pods/RxSwift/README.md
index 60e879b..a5749ca 100644
--- a/Example/Pods/RxSwift/README.md
+++ b/Example/Pods/RxSwift/README.md
@@ -1,17 +1,19 @@
 <img src="assets/Rx_Logo_M.png" alt="Miss Electric Eel 2016" width="36" height="36"> RxSwift: ReactiveX for Swift
 ======================================
 
-[![Travis CI](https://travis-ci.org/ReactiveX/RxSwift.svg?branch=master)](https://travis-ci.org/ReactiveX/RxSwift) ![platforms](https://img.shields.io/badge/platforms-iOS%20%7C%20OSX%20%7C%20tvOS%20%7C%20watchOS%20%7C%20Linux%28experimental%29-333333.svg) ![pod](https://img.shields.io/cocoapods/v/RxSwift.svg) [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
-
-Xcode 7.3 Swift 2.2 required
+[![Travis CI](https://travis-ci.org/ReactiveX/RxSwift.svg?branch=master)](https://travis-ci.org/ReactiveX/RxSwift) ![platforms](https://img.shields.io/badge/platforms-iOS%20%7C%20macOS%20%7C%20tvOS%20%7C%20watchOS%20%7C%20Linux-333333.svg) ![pod](https://img.shields.io/cocoapods/v/RxSwift.svg) [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage) [![Swift Package Manager compatible](https://img.shields.io/badge/Swift%20Package%20Manager-compatible-brightgreen.svg)](https://github.com/apple/swift-package-manager)
 
 ## About Rx
 
+**:warning: This readme describes RxSwift 3.0 version that requires Swift 3.0.**
+
+**:warning: If you are looking for Swift 2.3 compatible version, please take a look at RxSwift ~> 2.0 versions and [swift-2.3](https://github.com/ReactiveX/RxSwift/tree/rxswift-2.0) branch.**
+
 Rx is a [generic abstraction of computation](https://youtu.be/looJcaeboBY) expressed through `Observable<Element>` interface.
 
 This is a Swift version of [Rx](https://github.com/Reactive-Extensions/Rx.NET).
 
-It tries to port as many concepts from the original version as possible, but some concepts were adapted for more pleasant and performant integration with iOS/OSX environment.
+It tries to port as many concepts from the original version as possible, but some concepts were adapted for more pleasant and performant integration with iOS/macOS environment.
 
 Cross platform documentation can be found on [ReactiveX.io](http://reactivex.io/).
 
@@ -31,11 +33,10 @@ KVO observing, async operations and streams are all unified under [abstraction o
 * [debugging](Documentation/GettingStarted.md#debugging)
 * [the math behind Rx](Documentation/MathBehindRx.md)
 * [what are hot and cold observable sequences?](Documentation/HotAndColdObservables.md)
-* [what does the the public API look like?](Documentation/API.md)
 
 ###### ... install
 
-* Integrate RxSwift/RxCocoa with my app. [Installation Guide](Documentation/Installation.md)
+* Integrate RxSwift/RxCocoa with my app. [Installation Guide](#installation)
 
 ###### ... hack around
 
@@ -44,8 +45,8 @@ KVO observing, async operations and streams are all unified under [abstraction o
 
 ###### ... interact
 
-* All of this is great, but it would be nice to talk with other people using RxSwift and exchange experiences. <br />[![Slack channel](http://slack.rxswift.org/badge.svg)](http://slack.rxswift.org) [Join Slack Channel](http://slack.rxswift.org/)
-* Report a problem using the library. [Open an Issue With Bug Template](Documentation/IssueTemplate.md)
+* All of this is great, but it would be nice to talk with other people using RxSwift and exchange experiences. <br />[![Slack channel](http://rxswift-slack.herokuapp.com/badge.svg)](http://slack.rxswift.org) [Join Slack Channel](http://rxswift-slack.herokuapp.com)
+* Report a problem using the library. [Open an Issue With Bug Template](.github/ISSUE_TEMPLATE.md)
 * Request a new feature. [Open an Issue With Feature Request Template](Documentation/NewFeatureRequestTemplate.md)
 
 
@@ -77,12 +78,12 @@ KVO observing, async operations and streams are all unified under [abstraction o
   </tr>
   <tr>
     <td><div class="highlight highlight-source-swift"><pre>
-let searchResults = searchBar.rx_text
+let searchResults = searchBar.rx.text
     .throttle(0.3, scheduler: MainScheduler.instance)
     .distinctUntilChanged()
     .flatMapLatest { query -> Observable<[Repository]> in
         if query.isEmpty {
-            return Observable.just([])
+            return .just([])
         }
 
         return searchGitHub(query)
@@ -96,7 +97,7 @@ let searchResults = searchBar.rx_text
   <tr>
     <td width="30%"><div class="highlight highlight-source-swift"><pre>
 searchResults
-    .bindTo(tableView.rx_itemsWithCellIdentifier("Cell")) {
+    .bindTo(tableView.rx.items(cellIdentifier: "Cell")) {
         (index, repository: Repository, cell) in
         cell.textLabel?.text = repository.name
         cell.detailTextLabel?.text = repository.url
@@ -106,6 +107,11 @@ searchResults
 </table>
 
 
+## Requirements
+
+* Xcode 8.0
+* Swift 3.0
+
 ## Installation
 
 Rx doesn't contain any external dependencies.
@@ -118,21 +124,21 @@ Open Rx.xcworkspace, choose `RxExample` and hit run. This method will build ever
 
 ### [CocoaPods](https://guides.cocoapods.org/using/using-cocoapods.html)
 
-**:warning: IMPORTANT! For tvOS support, CocoaPods `0.39` is required. :warning:**
+**Tested with `pod --version`: `1.1.1`**
 
 ```
 # Podfile
 use_frameworks!
 
 target 'YOUR_TARGET_NAME' do
-    pod 'RxSwift',    '~> 2.0'
-    pod 'RxCocoa',    '~> 2.0'
+    pod 'RxSwift',    '~> 3.0'
+    pod 'RxCocoa',    '~> 3.0'
 end
 
 # RxTests and RxBlocking make the most sense in the context of unit/integration tests
 target 'YOUR_TESTING_TARGET' do
-    pod 'RxBlocking', '~> 2.0'
-    pod 'RxTests',    '~> 2.0'
+    pod 'RxBlocking', '~> 3.0'
+    pod 'RxTest',     '~> 3.0'
 end
 ```
 
@@ -144,18 +150,40 @@ $ pod install
 
 ### [Carthage](https://github.com/Carthage/Carthage)
 
-**Xcode 7.1 required**
+**Tested with `carthage version`: `0.18.1`**
 
 Add this to `Cartfile`
 
 ```
-github "ReactiveX/RxSwift" ~> 2.0
+github "ReactiveX/RxSwift" ~> 3.0
 ```
 
 ```
 $ carthage update
 ```
 
+### [Swift Package Manager](https://github.com/apple/swift-package-manager)
+
+**Tested with `swift build --version`: `3.0.0 (swiftpm-19)`**
+
+Create a `Package.swift` file.
+
+```
+import PackageDescription
+
+let package = Package(
+    name: "RxTestProject",
+    targets: [],
+    dependencies: [
+        .Package(url: "https://github.com/ReactiveX/RxSwift.git", majorVersion: 3)
+    ]
+)
+```
+
+```
+$ swift build
+```
+
 ### Manually using git submodules
 
 * Add RxSwift as a submodule
diff --git a/Example/Pods/RxSwift/RxSwift/AnyObserver.swift b/Example/Pods/RxSwift/RxSwift/AnyObserver.swift
index 88a8440..cab759a 100644
--- a/Example/Pods/RxSwift/RxSwift/AnyObserver.swift
+++ b/Example/Pods/RxSwift/RxSwift/AnyObserver.swift
@@ -1,6 +1,6 @@
 //
 //  AnyObserver.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/28/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,68 +8,62 @@
 
 import Foundation
 
-/**
-A type-erased `ObserverType`.
-
-Forwards operations to an arbitrary underlying observer with the same `Element` type, hiding the specifics of the underlying observer type.
-*/
+/// A type-erased `ObserverType`.
+///
+/// Forwards operations to an arbitrary underlying observer with the same `Element` type, hiding the specifics of the underlying observer type.
 public struct AnyObserver<Element> : ObserverType {
-    /**
-    The type of elements in sequence that observer can observe.
-    */
+    /// The type of elements in sequence that observer can observe.
     public typealias E = Element
     
-    /**
-    Anonymous event handler type.
-    */
+    /// Anonymous event handler type.
     public typealias EventHandler = (Event<Element>) -> Void
 
-    public let observer: EventHandler
+    private let observer: EventHandler
 
-    /**
-    Construct an instance whose `on(event)` calls `eventHandler(event)`
-    
-    - parameter eventHandler: Event handler that observes sequences events.
-    */
-    public init(eventHandler: EventHandler) {
+    /// Construct an instance whose `on(event)` calls `eventHandler(event)`
+    ///
+    /// - parameter eventHandler: Event handler that observes sequences events.
+    public init(eventHandler: @escaping EventHandler) {
         self.observer = eventHandler
     }
     
-    /**
-    Construct an instance whose `on(event)` calls `observer.on(event)`
-    
-    - parameter observer: Observer that receives sequence events.
-    */
-    public init<O : ObserverType where O.E == Element>(_ observer: O) {
+    /// Construct an instance whose `on(event)` calls `observer.on(event)`
+    ///
+    /// - parameter observer: Observer that receives sequence events.
+    public init<O : ObserverType>(_ observer: O) where O.E == Element {
         self.observer = observer.on
     }
     
-    /**
-    Send `event` to this observer.
-    
-    - parameter event: Event instance.
-    */
-    public func on(event: Event<Element>) {
+    /// Send `event` to this observer.
+    ///
+    /// - parameter event: Event instance.
+    public func on(_ event: Event<Element>) {
         return self.observer(event)
     }
 
-    /**
-     Erases type of observer and returns canonical observer.
-
-     - returns: type erased observer.
-     */
+    /// Erases type of observer and returns canonical observer.
+    ///
+    /// - returns: type erased observer.
     public func asObserver() -> AnyObserver<E> {
         return self
     }
 }
 
 extension ObserverType {
-    /**
-    Erases type of observer and returns canonical observer.
-    
-    - returns: type erased observer.
-    */
+    /// Erases type of observer and returns canonical observer.
+    ///
+    /// - returns: type erased observer.
     public func asObserver() -> AnyObserver<E> {
         return AnyObserver(self)
     }
-}
\ No newline at end of file
+
+    /// Transforms observer of type R to type E using custom transform method.
+    /// Each event sent to result observer is transformed and sent to `self`.
+    ///
+    /// - returns: observer that transforms events.
+    public func mapObserver<R>(_ transform: @escaping (R) throws -> E) -> AnyObserver<R> {
+        return AnyObserver { e in
+            self.on(e.map(transform))
+        }
+    }
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Cancelable.swift b/Example/Pods/RxSwift/RxSwift/Cancelable.swift
index 1a6c591..2398be6 100644
--- a/Example/Pods/RxSwift/RxSwift/Cancelable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Cancelable.swift
@@ -1,6 +1,6 @@
 //
 //  Cancelable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/12/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,12 +8,8 @@
 
 import Foundation
 
-/**
-Represents disposable resource with state tracking.
-*/
+/// Represents disposable resource with state tracking.
 public protocol Cancelable : Disposable {
-    /**
-    - returns: Was resource disposed.
-    */
-    var disposed: Bool { get }
-}
\ No newline at end of file
+    /// Was resource disposed.
+    var isDisposed: Bool { get }
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Concurrency/AsyncLock.swift b/Example/Pods/RxSwift/RxSwift/Concurrency/AsyncLock.swift
index e39fa6c..3ba6ed2 100644
--- a/Example/Pods/RxSwift/RxSwift/Concurrency/AsyncLock.swift
+++ b/Example/Pods/RxSwift/RxSwift/Concurrency/AsyncLock.swift
@@ -1,6 +1,6 @@
 //
 //  AsyncLock.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/21/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -41,7 +41,7 @@ class AsyncLock<I: InvocableType>
     }
     // }
 
-    private func enqueue(action: I) -> I? {
+    private func enqueue(_ action: I) -> I? {
         _lock.lock(); defer { _lock.unlock() } // {
             if _hasFaulted {
                 return nil
@@ -70,7 +70,7 @@ class AsyncLock<I: InvocableType>
         // }
     }
 
-    func invoke(action: I) {
+    func invoke(_ action: I) {
         let firstEnqueuedAction = enqueue(action)
         
         if let firstEnqueuedAction = firstEnqueuedAction {
diff --git a/Example/Pods/RxSwift/RxSwift/Concurrency/Lock.swift b/Example/Pods/RxSwift/RxSwift/Concurrency/Lock.swift
index d1632f1..4a0c1cd 100644
--- a/Example/Pods/RxSwift/RxSwift/Concurrency/Lock.swift
+++ b/Example/Pods/RxSwift/RxSwift/Concurrency/Lock.swift
@@ -1,6 +1,6 @@
 //
 //  Lock.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/31/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -13,95 +13,23 @@ protocol Lock {
     func unlock()
 }
 
-#if os(Linux)
-  import Glibc
-
-  /**
-  Simple wrapper for spin lock.
-  */
-  class SpinLock {
-      private var _lock: pthread_spinlock_t = 0
-
-      init() {
-          if (pthread_spin_init(&_lock, 0) != 0) {
-              fatalError("Spin lock initialization failed")
-          }
-      }
-
-      func lock() {
-          pthread_spin_lock(&_lock)
-      }
-
-      func unlock() {
-          pthread_spin_unlock(&_lock)
-      }
-
-      func performLocked(@noescape action: () -> Void) {
-          lock(); defer { unlock() }
-          action()
-      }
-
-      func calculateLocked<T>(@noescape action: () -> T) -> T {
-          lock(); defer { unlock() }
-          return action()
-      }
-
-      func calculateLockedOrFail<T>(@noescape action: () throws -> T) throws -> T {
-          lock(); defer { unlock() }
-          let result = try action()
-          return result
-      }
-
-      deinit {
-          pthread_spin_destroy(&_lock)
-      }
-  }
-#else
-
-    // https://lists.swift.org/pipermail/swift-dev/Week-of-Mon-20151214/000321.html
-    typealias SpinLock = NSRecursiveLock
-#endif
+// https://lists.swift.org/pipermail/swift-dev/Week-of-Mon-20151214/000321.html
+typealias SpinLock = NSRecursiveLock
 
 extension NSRecursiveLock : Lock {
-    func performLocked(@noescape action: () -> Void) {
+    func performLocked(_ action: () -> Void) {
         lock(); defer { unlock() }
         action()
     }
 
-    func calculateLocked<T>(@noescape action: () -> T) -> T {
+    func calculateLocked<T>(_ action: () -> T) -> T {
         lock(); defer { unlock() }
         return action()
     }
 
-    func calculateLockedOrFail<T>(@noescape action: () throws -> T) throws -> T {
+    func calculateLockedOrFail<T>(_ action: () throws -> T) throws -> T {
         lock(); defer { unlock() }
         let result = try action()
         return result
     }
 }
-
-/*
-let RECURSIVE_MUTEX = _initializeRecursiveMutex()
-
-func _initializeRecursiveMutex() -> pthread_mutex_t {
-    var mutex: pthread_mutex_t = pthread_mutex_t()
-    var mta: pthread_mutexattr_t = pthread_mutexattr_t()
-
-    pthread_mutex_init(&mutex, nil)
-    pthread_mutexattr_init(&mta)
-    pthread_mutexattr_settype(&mta, PTHREAD_MUTEX_RECURSIVE)
-    pthread_mutex_init(&mutex, &mta)
-
-    return mutex
-}
-
-extension pthread_mutex_t {
-    mutating func lock() {
-        pthread_mutex_lock(&self)
-    }
-
-    mutating func unlock() {
-        pthread_mutex_unlock(&self)
-    }
-}
-*/
diff --git a/Example/Pods/RxSwift/RxSwift/Concurrency/LockOwnerType.swift b/Example/Pods/RxSwift/RxSwift/Concurrency/LockOwnerType.swift
index b11fcaa..41595a9 100644
--- a/Example/Pods/RxSwift/RxSwift/Concurrency/LockOwnerType.swift
+++ b/Example/Pods/RxSwift/RxSwift/Concurrency/LockOwnerType.swift
@@ -1,6 +1,6 @@
 //
 //  LockOwnerType.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 10/25/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -20,4 +20,4 @@ extension LockOwnerType {
     func unlock() {
         _lock.unlock()
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedDisposeType.swift b/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedDisposeType.swift
index 5764575..9bd95b9 100644
--- a/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedDisposeType.swift
+++ b/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedDisposeType.swift
@@ -1,6 +1,6 @@
 //
 //  SynchronizedDisposeType.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 10/25/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -17,4 +17,4 @@ extension SynchronizedDisposeType {
         lock(); defer { unlock() }
         _synchronized_dispose()
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedOnType.swift b/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedOnType.swift
index 84a3df5..3c383d1 100644
--- a/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedOnType.swift
+++ b/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedOnType.swift
@@ -1,6 +1,6 @@
 //
 //  SynchronizedOnType.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 10/25/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,12 +9,12 @@
 import Foundation
 
 protocol SynchronizedOnType : class, ObserverType, Lock {
-    func _synchronized_on(event: Event<E>)
+    func _synchronized_on(_ event: Event<E>)
 }
 
 extension SynchronizedOnType {
-    func synchronizedOn(event: Event<E>) {
+    func synchronizedOn(_ event: Event<E>) {
         lock(); defer { unlock() }
         _synchronized_on(event)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedSubscribeType.swift b/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedSubscribeType.swift
index a490315..ca79012 100644
--- a/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedSubscribeType.swift
+++ b/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedSubscribeType.swift
@@ -1,6 +1,6 @@
 //
 //  SynchronizedSubscribeType.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 10/25/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,12 +9,12 @@
 import Foundation
 
 protocol SynchronizedSubscribeType : class, ObservableType, Lock {
-    func _synchronized_subscribe<O: ObserverType where O.E == E>(observer: O) -> Disposable
+    func _synchronized_subscribe<O: ObserverType>(_ observer: O) -> Disposable where O.E == E
 }
 
 extension SynchronizedSubscribeType {
-    func synchronizedSubscribe<O: ObserverType where O.E == E>(observer: O) -> Disposable {
+    func synchronizedSubscribe<O: ObserverType>(_ observer: O) -> Disposable where O.E == E {
         lock(); defer { unlock() }
         return _synchronized_subscribe(observer)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedUnsubscribeType.swift b/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedUnsubscribeType.swift
index 4f41cb8..fc82ddd 100644
--- a/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedUnsubscribeType.swift
+++ b/Example/Pods/RxSwift/RxSwift/Concurrency/SynchronizedUnsubscribeType.swift
@@ -1,6 +1,6 @@
 //
 //  SynchronizedUnsubscribeType.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 10/25/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -11,5 +11,5 @@ import Foundation
 protocol SynchronizedUnsubscribeType : class {
     associatedtype DisposeKey
 
-    func synchronizedUnsubscribe(disposeKey: DisposeKey)
-}
\ No newline at end of file
+    func synchronizedUnsubscribe(_ disposeKey: DisposeKey)
+}
diff --git a/Example/Pods/RxSwift/RxSwift/ConnectableObservableType.swift b/Example/Pods/RxSwift/RxSwift/ConnectableObservableType.swift
index 6722a4c..bf8f5f0 100644
--- a/Example/Pods/RxSwift/RxSwift/ConnectableObservableType.swift
+++ b/Example/Pods/RxSwift/RxSwift/ConnectableObservableType.swift
@@ -1,6 +1,6 @@
 //
 //  ConnectableObservableType.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/1/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -18,4 +18,4 @@ public protocol ConnectableObservableType : ObservableType {
     - returns: Disposable used to disconnect the observable wrapper from its source, causing subscribed observer to stop receiving values from the underlying observable sequence.
     */
     func connect() -> Disposable
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/DataStructures/Bag.swift b/Example/Pods/RxSwift/RxSwift/DataStructures/Bag.swift
deleted file mode 100644
index fe074de..0000000
--- a/Example/Pods/RxSwift/RxSwift/DataStructures/Bag.swift
+++ /dev/null
@@ -1,327 +0,0 @@
-//
-//  Bag.swift
-//  Rx
-//
-//  Created by Krunoslav Zaher on 2/28/15.
-//  Copyright © 2015 Krunoslav Zaher. All rights reserved.
-//
-
-import Foundation
-import Swift
-
-let arrayDictionaryMaxSize = 30
-
-/**
-Class that enables using memory allocations as a means to uniquely identify objects.
-*/
-class Identity {
-    // weird things have known to happen with Swift
-    var _forceAllocation: Int32 = 0
-}
-
-func hash(_x: Int) -> Int {
-    var x = _x
-    x = ((x >> 16) ^ x) &* 0x45d9f3b
-    x = ((x >> 16) ^ x) &* 0x45d9f3b
-    x = ((x >> 16) ^ x)
-    return x;
-}
-
-/**
-Unique identifier for object added to `Bag`.
-*/
-public struct BagKey : Hashable {
-    let uniqueIdentity: Identity?
-    let key: Int
-
-    public var hashValue: Int {
-        if let uniqueIdentity = uniqueIdentity {
-            return hash(key) ^ (unsafeAddressOf(uniqueIdentity).hashValue)
-        }
-        else {
-            return hash(key)
-        }
-    }
-}
-
-/**
-Compares two `BagKey`s.
-*/
-public func == (lhs: BagKey, rhs: BagKey) -> Bool {
-    return lhs.key == rhs.key && lhs.uniqueIdentity === rhs.uniqueIdentity
-}
-
-/**
-Data structure that represents a bag of elements typed `T`.
-
-Single element can be stored multiple times.
-
-Time and space complexity of insertion an deletion is O(n). 
-
-It is suitable for storing small number of elements.
-*/
-public struct Bag<T> : CustomDebugStringConvertible {
-    /**
-    Type of identifier for inserted elements.
-    */
-    public typealias KeyType = BagKey
-    
-    private typealias ScopeUniqueTokenType = Int
-    
-    typealias Entry = (key: BagKey, value: T)
- 
-    private var _uniqueIdentity: Identity?
-    private var _nextKey: ScopeUniqueTokenType = 0
-
-    // data
-
-    // first fill inline variables
-    private var _key0: BagKey? = nil
-    private var _value0: T? = nil
-
-    private var _key1: BagKey? = nil
-    private var _value1: T? = nil
-
-    // then fill "array dictionary"
-    private var _pairs = ContiguousArray<Entry>()
-
-    // last is sparse dictionary
-    private var _dictionary: [BagKey : T]? = nil
-
-    private var _onlyFastPath = true
-
-    /**
-    Creates new empty `Bag`.
-    */
-    public init() {
-    }
-    
-    /**
-    Inserts `value` into bag.
-    
-    - parameter element: Element to insert.
-    - returns: Key that can be used to remove element from bag.
-    */
-    public mutating func insert(element: T) -> BagKey {
-        _nextKey = _nextKey &+ 1
-
-#if DEBUG
-        _nextKey = _nextKey % 20
-#endif
-        
-        if _nextKey == 0 {
-            _uniqueIdentity = Identity()
-        }
-
-        let key = BagKey(uniqueIdentity: _uniqueIdentity, key: _nextKey)
-
-        if _key0 == nil {
-            _key0 = key
-            _value0 = element
-            return key
-        }
-
-        _onlyFastPath = false
-
-        if _key1 == nil {
-            _key1 = key
-            _value1 = element
-            return key
-        }
-
-        if _dictionary != nil {
-            _dictionary![key] = element
-            return key
-        }
-
-        if _pairs.count < arrayDictionaryMaxSize {
-            _pairs.append(key: key, value: element)
-            return key
-        }
-
-        if _dictionary == nil {
-            _dictionary = [:]
-        }
-
-        _dictionary![key] = element
-        
-        return key
-    }
-    
-    /**
-    - returns: Number of elements in bag.
-    */
-    public var count: Int {
-        return _pairs.count + (_value0 != nil ? 1 : 0) + (_value1 != nil ? 1 : 0) + (_dictionary?.count ?? 0)
-    }
-    
-    /**
-    Removes all elements from bag and clears capacity.
-    */
-    public mutating func removeAll() {
-        _key0 = nil
-        _value0 = nil
-        _key1 = nil
-        _value1 = nil
-
-        _pairs.removeAll(keepCapacity: false)
-        _dictionary?.removeAll(keepCapacity: false)
-    }
-    
-    /**
-    Removes element with a specific `key` from bag.
-    
-    - parameter key: Key that identifies element to remove from bag.
-    - returns: Element that bag contained, or nil in case element was already removed.
-    */
-    public mutating func removeKey(key: BagKey) -> T? {
-        if _key0 == key {
-            _key0 = nil
-            let value = _value0!
-            _value0 = nil
-            return value
-        }
-
-        if _key1 == key {
-            _key1 = nil
-            let value = _value1!
-            _value1 = nil
-            return value
-        }
-
-        if let existingObject = _dictionary?.removeValueForKey(key) {
-            return existingObject
-        }
-
-        for i in 0 ..< _pairs.count {
-            if _pairs[i].key == key {
-                let value = _pairs[i].value
-                _pairs.removeAtIndex(i)
-                return value
-            }
-        }
-
-        return nil
-    }
-}
-
-extension Bag {
-    /**
-    A textual representation of `self`, suitable for debugging.
-    */
-    public var debugDescription : String {
-        return "\(self.count) elements in Bag"
-    }
-}
-
-
-// MARK: forEach
-
-extension Bag {
-    /**
-    Enumerates elements inside the bag.
-    
-    - parameter action: Enumeration closure.
-    */
-    public func forEach(@noescape action: (T) -> Void) {
-        if _onlyFastPath {
-            if let value0 = _value0 {
-                action(value0)
-            }
-            return
-        }
-
-        let pairs = _pairs
-        let value0 = _value0
-        let value1 = _value1
-        let dictionary = _dictionary
-
-        if let value0 = value0 {
-            action(value0)
-        }
-
-        if let value1 = value1 {
-            action(value1)
-        }
-
-        for i in 0 ..< pairs.count {
-            action(pairs[i].value)
-        }
-
-        if dictionary?.count ?? 0 > 0 {
-            for element in dictionary!.values {
-                action(element)
-            }
-        }
-    }
-}
-
-extension Bag where T: ObserverType {
-    /**
-     Dispatches `event` to app observers contained inside bag.
-
-     - parameter action: Enumeration closure.
-     */
-    public func on(event: Event<T.E>) {
-        if _onlyFastPath {
-            _value0?.on(event)
-            return
-        }
-
-        let pairs = _pairs
-        let value0 = _value0
-        let value1 = _value1
-        let dictionary = _dictionary
-
-        if let value0 = value0 {
-            value0.on(event)
-        }
-
-        if let value1 = value1 {
-            value1.on(event)
-        }
-
-        for i in 0 ..< pairs.count {
-            pairs[i].value.on(event)
-        }
-
-        if dictionary?.count ?? 0 > 0 {
-            for element in dictionary!.values {
-                element.on(event)
-            }
-        }
-    }
-}
-
-/**
-Dispatches `dispose` to all disposables contained inside bag.
-*/
-public func disposeAllIn(bag: Bag<Disposable>) {
-    if bag._onlyFastPath {
-        bag._value0?.dispose()
-        return
-    }
-
-    let pairs = bag._pairs
-    let value0 = bag._value0
-    let value1 = bag._value1
-    let dictionary = bag._dictionary
-
-    if let value0 = value0 {
-        value0.dispose()
-    }
-
-    if let value1 = value1 {
-        value1.dispose()
-    }
-
-    for i in 0 ..< pairs.count {
-        pairs[i].value.dispose()
-    }
-
-    if dictionary?.count ?? 0 > 0 {
-        for element in dictionary!.values {
-            element.dispose()
-        }
-    }
-}
diff --git a/Example/Pods/RxSwift/RxSwift/Disposable.swift b/Example/Pods/RxSwift/RxSwift/Disposable.swift
index da760ff..11e5d16 100644
--- a/Example/Pods/RxSwift/RxSwift/Disposable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Disposable.swift
@@ -1,6 +1,6 @@
 //
 //  Disposable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/8/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -12,4 +12,4 @@ import Foundation
 public protocol Disposable {
     /// Dispose resource.
     func dispose()
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/AnonymousDisposable.swift b/Example/Pods/RxSwift/RxSwift/Disposables/AnonymousDisposable.swift
index 17a4091..74461a6 100644
--- a/Example/Pods/RxSwift/RxSwift/Disposables/AnonymousDisposable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Disposables/AnonymousDisposable.swift
@@ -1,6 +1,6 @@
 //
 //  AnonymousDisposable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/15/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,42 +8,40 @@
 
 import Foundation
 
-/**
-Represents an Action-based disposable.
-
-When dispose method is called, disposal action will be dereferenced.
-*/
-public final class AnonymousDisposable : DisposeBase, Cancelable {
+/// Represents an Action-based disposable.
+///
+/// When dispose method is called, disposal action will be dereferenced.
+fileprivate final class AnonymousDisposable : DisposeBase, Cancelable {
     public typealias DisposeAction = () -> Void
 
-    private var _disposed: AtomicInt = 0
+    private var _isDisposed: AtomicInt = 0
     private var _disposeAction: DisposeAction?
 
-    /**
-    - returns: Was resource disposed.
-    */
-    public var disposed: Bool {
-        return _disposed == 1
+    /// - returns: Was resource disposed.
+    public var isDisposed: Bool {
+        return _isDisposed == 1
     }
 
-    /**
-    Constructs a new disposable with the given action used for disposal.
-
-    - parameter disposeAction: Disposal action which will be run upon calling `dispose`.
-    */
-    public init(_ disposeAction: DisposeAction) {
+    /// Constructs a new disposable with the given action used for disposal.
+    ///
+    /// - parameter disposeAction: Disposal action which will be run upon calling `dispose`.
+    fileprivate init(_ disposeAction: @escaping DisposeAction) {
         _disposeAction = disposeAction
         super.init()
     }
-
-    /**
-    Calls the disposal action if and only if the current instance hasn't been disposed yet.
-
-    After invoking disposal action, disposal action will be dereferenced.
-    */
-    public func dispose() {
-        if AtomicCompareAndSwap(0, 1, &_disposed) {
-            assert(_disposed == 1)
+    
+    // Non-deprecated version of the constructor, used by `Disposables.create(with:)`
+    fileprivate init(disposeAction: @escaping DisposeAction) {
+        _disposeAction = disposeAction
+        super.init()
+    }
+    
+    /// Calls the disposal action if and only if the current instance hasn't been disposed yet.
+    ///
+    /// After invoking disposal action, disposal action will be dereferenced.
+    fileprivate func dispose() {
+        if AtomicCompareAndSwap(0, 1, &_isDisposed) {
+            assert(_isDisposed == 1)
 
             if let action = _disposeAction {
                 _disposeAction = nil
@@ -52,3 +50,14 @@ public final class AnonymousDisposable : DisposeBase, Cancelable {
         }
     }
 }
+
+extension Disposables {
+    
+    /// Constructs a new disposable with the given action used for disposal.
+    ///
+    /// - parameter dispose: Disposal action which will be run upon calling `dispose`.
+    public static func create(with dispose: @escaping () -> ()) -> Cancelable {
+        return AnonymousDisposable(disposeAction: dispose)
+    }
+    
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/BinaryDisposable.swift b/Example/Pods/RxSwift/RxSwift/Disposables/BinaryDisposable.swift
index b617659..aef8200 100644
--- a/Example/Pods/RxSwift/RxSwift/Disposables/BinaryDisposable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Disposables/BinaryDisposable.swift
@@ -8,43 +8,35 @@
 
 import Foundation
 
-/**
-Represents two disposable resources that are disposed together.
-*/
-public final class BinaryDisposable : DisposeBase, Cancelable {
+/// Represents two disposable resources that are disposed together.
+private final class BinaryDisposable : DisposeBase, Cancelable {
 
-    private var _disposed: AtomicInt = 0
+    private var _isDisposed: AtomicInt = 0
 
     // state
     private var _disposable1: Disposable?
     private var _disposable2: Disposable?
 
-    /**
-    - returns: Was resource disposed.
-    */
-    public var disposed: Bool {
-        return _disposed > 0
+    /// - returns: Was resource disposed.
+    var isDisposed: Bool {
+        return _isDisposed > 0
     }
 
-    /**
-    Constructs new binary disposable from two disposables.
-
-    - parameter disposable1: First disposable
-    - parameter disposable2: Second disposable
-    */
+    /// Constructs new binary disposable from two disposables.
+    ///
+    /// - parameter disposable1: First disposable
+    /// - parameter disposable2: Second disposable
     init(_ disposable1: Disposable, _ disposable2: Disposable) {
         _disposable1 = disposable1
         _disposable2 = disposable2
         super.init()
     }
 
-    /**
-    Calls the disposal action if and only if the current instance hasn't been disposed yet.
-
-    After invoking disposal action, disposal action will be dereferenced.
-    */
-    public func dispose() {
-        if AtomicCompareAndSwap(0, 1, &_disposed) {
+    /// Calls the disposal action if and only if the current instance hasn't been disposed yet.
+    ///
+    /// After invoking disposal action, disposal action will be dereferenced.
+    func dispose() {
+        if AtomicCompareAndSwap(0, 1, &_isDisposed) {
             _disposable1?.dispose()
             _disposable2?.dispose()
             _disposable1 = nil
@@ -52,3 +44,12 @@ public final class BinaryDisposable : DisposeBase, Cancelable {
         }
     }
 }
+
+extension Disposables {
+    
+    /// Creates a disposable with the given disposables.
+    public static func create(_ disposable1: Disposable, _ disposable2: Disposable) -> Cancelable {
+        return BinaryDisposable(disposable1, disposable2)
+    }
+    
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/BooleanDisposable.swift b/Example/Pods/RxSwift/RxSwift/Disposables/BooleanDisposable.swift
index 05b8a43..bdd285e 100644
--- a/Example/Pods/RxSwift/RxSwift/Disposables/BooleanDisposable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Disposables/BooleanDisposable.swift
@@ -1,6 +1,6 @@
 //
 //  BooleanDisposable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Junior B. on 10/29/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,38 +8,28 @@
 
 import Foundation
 
-/**
-Represents a disposable resource that can be checked for disposal status.
-*/
-public class BooleanDisposable : Disposable, Cancelable {
- 
-    internal static let BooleanDisposableTrue = BooleanDisposable(disposed: true)
-    private var _disposed = false
+/// Represents a disposable resource that can be checked for disposal status.
+public final class BooleanDisposable : Disposable, Cancelable {
+
+    internal static let BooleanDisposableTrue = BooleanDisposable(isDisposed: true)
+    private var _isDisposed = false
     
-    /**
-        Initializes a new instance of the `BooleanDisposable` class
-     */
+    /// Initializes a new instance of the `BooleanDisposable` class
     public init() {
     }
     
-    /**
-        Initializes a new instance of the `BooleanDisposable` class with given value
-     */
-    public init(disposed: Bool) {
-        self._disposed = disposed
+    /// Initializes a new instance of the `BooleanDisposable` class with given value
+    public init(isDisposed: Bool) {
+        self._isDisposed = isDisposed
     }
     
-    /**
-        - returns: Was resource disposed.
-     */
-    public var disposed: Bool {
-        return _disposed
+    /// - returns: Was resource disposed.
+    public var isDisposed: Bool {
+        return _isDisposed
     }
     
-    /**
-        Sets the status to disposed, which can be observer through the `disposed` property.
-     */
+    /// Sets the status to disposed, which can be observer through the `isDisposed` property.
     public func dispose() {
-        _disposed = true
+        _isDisposed = true
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/CompositeDisposable.swift b/Example/Pods/RxSwift/RxSwift/Disposables/CompositeDisposable.swift
index dbf5068..e8c31df 100644
--- a/Example/Pods/RxSwift/RxSwift/Disposables/CompositeDisposable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Disposables/CompositeDisposable.swift
@@ -1,6 +1,6 @@
 //
 //  CompositeDisposable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/20/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,18 +8,22 @@
 
 import Foundation
 
-/**
-Represents a group of disposable resources that are disposed together.
-*/
-public class CompositeDisposable : DisposeBase, Disposable, Cancelable {
-    public typealias DisposeKey = Bag<Disposable>.KeyType
-    
+/// Represents a group of disposable resources that are disposed together.
+public final class CompositeDisposable : DisposeBase, Disposable, Cancelable {
+    /// Key used to remove disposable from composite disposable
+    public struct DisposeKey {
+        fileprivate let key: BagKey
+        fileprivate init(key: BagKey) {
+            self.key = key
+        }
+    }
+
     private var _lock = SpinLock()
     
     // state
     private var _disposables: Bag<Disposable>? = Bag()
 
-    public var disposed: Bool {
+    public var isDisposed: Bool {
         _lock.lock(); defer { _lock.unlock() }
         return _disposables == nil
     }
@@ -27,83 +31,87 @@ public class CompositeDisposable : DisposeBase, Disposable, Cancelable {
     public override init() {
     }
     
-    /**
-     Initializes a new instance of composite disposable with the specified number of disposables.
-    */
+    /// Initializes a new instance of composite disposable with the specified number of disposables.
     public init(_ disposable1: Disposable, _ disposable2: Disposable) {
-        _disposables!.insert(disposable1)
-        _disposables!.insert(disposable2)
+        // This overload is here to make sure we are using optimized version up to 4 arguments.
+        let _ = _disposables!.insert(disposable1)
+        let _ = _disposables!.insert(disposable2)
     }
     
-    /**
-     Initializes a new instance of composite disposable with the specified number of disposables.
-    */
+    /// Initializes a new instance of composite disposable with the specified number of disposables.
     public init(_ disposable1: Disposable, _ disposable2: Disposable, _ disposable3: Disposable) {
-        _disposables!.insert(disposable1)
-        _disposables!.insert(disposable2)
-        _disposables!.insert(disposable3)
+        // This overload is here to make sure we are using optimized version up to 4 arguments.
+        let _ = _disposables!.insert(disposable1)
+        let _ = _disposables!.insert(disposable2)
+        let _ = _disposables!.insert(disposable3)
     }
     
-    /**
-     Initializes a new instance of composite disposable with the specified number of disposables.
-    */
+    /// Initializes a new instance of composite disposable with the specified number of disposables.
+    public init(_ disposable1: Disposable, _ disposable2: Disposable, _ disposable3: Disposable, _ disposable4: Disposable, _ disposables: Disposable...) {
+        // This overload is here to make sure we are using optimized version up to 4 arguments.
+        let _ = _disposables!.insert(disposable1)
+        let _ = _disposables!.insert(disposable2)
+        let _ = _disposables!.insert(disposable3)
+        let _ = _disposables!.insert(disposable4)
+        
+        for disposable in disposables {
+            let _ = _disposables!.insert(disposable)
+        }
+    }
+    
+    /// Initializes a new instance of composite disposable with the specified number of disposables.
     public init(disposables: [Disposable]) {
         for disposable in disposables {
-            _disposables!.insert(disposable)
+            let _ = _disposables!.insert(disposable)
         }
     }
 
     /**
-    Adds a disposable to the CompositeDisposable or disposes the disposable if the CompositeDisposable is disposed.
-    
-    - parameter disposable: Disposable to add.
-    - returns: Key that can be used to remove disposable from composite disposable. In case dispose bag was already
-        disposed `nil` will be returned.
-    */
-    public func addDisposable(disposable: Disposable) -> DisposeKey? {
-        let key = _addDisposable(disposable)
-
+     Adds a disposable to the CompositeDisposable or disposes the disposable if the CompositeDisposable is disposed.
+     
+     - parameter disposable: Disposable to add.
+     - returns: Key that can be used to remove disposable from composite disposable. In case dispose bag was already
+     disposed `nil` will be returned.
+     */
+    public func insert(_ disposable: Disposable) -> DisposeKey? {
+        let key = _insert(disposable)
+        
         if key == nil {
             disposable.dispose()
         }
         
         return key
     }
-
-    private func _addDisposable(disposable: Disposable) -> DisposeKey? {
+    
+    private func _insert(_ disposable: Disposable) -> DisposeKey? {
         _lock.lock(); defer { _lock.unlock() }
 
-        return _disposables?.insert(disposable)
+        let bagKey = _disposables?.insert(disposable)
+        return bagKey.map(DisposeKey.init)
     }
     
-    /**
-    - returns: Gets the number of disposables contained in the `CompositeDisposable`.
-    */
+    /// - returns: Gets the number of disposables contained in the `CompositeDisposable`.
     public var count: Int {
         _lock.lock(); defer { _lock.unlock() }
         return _disposables?.count ?? 0
     }
     
-    /**
-    Removes and disposes the disposable identified by `disposeKey` from the CompositeDisposable.
-    
-    - parameter disposeKey: Key used to identify disposable to be removed.
-    */
-    public func removeDisposable(disposeKey: DisposeKey) {
-        _removeDisposable(disposeKey)?.dispose()
+    /// Removes and disposes the disposable identified by `disposeKey` from the CompositeDisposable.
+    ///
+    /// - parameter disposeKey: Key used to identify disposable to be removed.
+    public func remove(for disposeKey: DisposeKey) {
+        _remove(for: disposeKey)?.dispose()
     }
-
-    private func _removeDisposable(disposeKey: DisposeKey) -> Disposable? {
+    
+    private func _remove(for disposeKey: DisposeKey) -> Disposable? {
         _lock.lock(); defer { _lock.unlock() }
-        return _disposables?.removeKey(disposeKey)
+        return _disposables?.removeKey(disposeKey.key)
     }
     
-    /**
-    Disposes all disposables in the group and removes them from the group.
-    */
+    /// Disposes all disposables in the group and removes them from the group.
     public func dispose() {
         if let disposables = _dispose() {
-            disposeAllIn(disposables)
+            disposeAll(in: disposables)
         }
     }
 
@@ -115,4 +123,31 @@ public class CompositeDisposable : DisposeBase, Disposable, Cancelable {
 
         return disposeBag
     }
-}
\ No newline at end of file
+}
+
+extension Disposables {
+
+    /// Creates a disposable with the given disposables.
+    public static func create(_ disposable1: Disposable, _ disposable2: Disposable, _ disposable3: Disposable) -> Cancelable {
+        return CompositeDisposable(disposable1, disposable2, disposable3)
+    }
+    
+    /// Creates a disposable with the given disposables.
+    public static func create(_ disposable1: Disposable, _ disposable2: Disposable, _ disposable3: Disposable, _ disposables: Disposable ...) -> Cancelable {
+        var disposables = disposables
+        disposables.append(disposable1)
+        disposables.append(disposable2)
+        disposables.append(disposable3)
+        return CompositeDisposable(disposables: disposables)
+    }
+    
+    /// Creates a disposable with the given disposables.
+    public static func create(_ disposables: [Disposable]) -> Cancelable {
+        switch disposables.count {
+        case 2:
+            return Disposables.create(disposables[0], disposables[1])
+        default:
+            return CompositeDisposable(disposables: disposables)
+        }
+    }
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/Disposables.swift b/Example/Pods/RxSwift/RxSwift/Disposables/Disposables.swift
new file mode 100644
index 0000000..b409d52
--- /dev/null
+++ b/Example/Pods/RxSwift/RxSwift/Disposables/Disposables.swift
@@ -0,0 +1,15 @@
+//
+//  Disposables.swift
+//  RxSwift
+//
+//  Created by Mohsen Ramezanpoor on 01/08/2016.
+//  Copyright © 2016 Krunoslav Zaher. All rights reserved.
+//
+
+import Foundation
+
+/// A collection of utility methods for common disposable operations.
+public struct Disposables {
+    private init() {}
+}
+
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/DisposeBag.swift b/Example/Pods/RxSwift/RxSwift/Disposables/DisposeBag.swift
index 50b4447..d9cb86f 100644
--- a/Example/Pods/RxSwift/RxSwift/Disposables/DisposeBag.swift
+++ b/Example/Pods/RxSwift/RxSwift/Disposables/DisposeBag.swift
@@ -1,6 +1,6 @@
 //
 //  DisposeBag.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/25/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,13 +9,11 @@
 import Foundation
 
 extension Disposable {
-    /**
-    Adds `self` to `bag`.
-    
-    - parameter bag: `DisposeBag` to add `self` to.
-    */
-    public func addDisposableTo(bag: DisposeBag) {
-        bag.addDisposable(self)
+    /// Adds `self` to `bag`.
+    ///
+    /// - parameter bag: `DisposeBag` to add `self` to.
+    public func addDisposableTo(_ bag: DisposeBag) {
+        bag.insert(self)
     }
 }
 
@@ -31,33 +29,29 @@ or create a new one in its place.
 
 In case explicit disposal is necessary, there is also `CompositeDisposable`.
 */
-public class DisposeBag: DisposeBase {
+public final class DisposeBag: DisposeBase {
     
     private var _lock = SpinLock()
     
     // state
     private var _disposables = [Disposable]()
-    private var _disposed = false
+    private var _isDisposed = false
     
-    /**
-    Constructs new empty dispose bag.
-    */
+    /// Constructs new empty dispose bag.
     public override init() {
         super.init()
     }
     
-    /**
-    Adds `disposable` to be disposed when dispose bag is being deinited.
-    
-    - parameter disposable: Disposable to add.
-    */
-    public func addDisposable(disposable: Disposable) {
-        _addDisposable(disposable)?.dispose()
+    /// Adds `disposable` to be disposed when dispose bag is being deinited.
+    ///
+    /// - parameter disposable: Disposable to add.
+    public func insert(_ disposable: Disposable) {
+        _insert(disposable)?.dispose()
     }
-
-    private func _addDisposable(disposable: Disposable) -> Disposable? {
+    
+    private func _insert(_ disposable: Disposable) -> Disposable? {
         _lock.lock(); defer { _lock.unlock() }
-        if _disposed {
+        if _isDisposed {
             return disposable
         }
 
@@ -66,9 +60,7 @@ public class DisposeBag: DisposeBase {
         return nil
     }
 
-    /**
-    This is internal on purpose, take a look at `CompositeDisposable` instead.
-    */
+    /// This is internal on purpose, take a look at `CompositeDisposable` instead.
     private func dispose() {
         let oldDisposables = _dispose()
 
@@ -82,8 +74,8 @@ public class DisposeBag: DisposeBase {
 
         let disposables = _disposables
         
-        _disposables.removeAll(keepCapacity: false)
-        _disposed = true
+        _disposables.removeAll(keepingCapacity: false)
+        _isDisposed = true
         
         return disposables
     }
@@ -91,4 +83,4 @@ public class DisposeBag: DisposeBase {
     deinit {
         dispose()
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/DisposeBase.swift b/Example/Pods/RxSwift/RxSwift/Disposables/DisposeBase.swift
index 53c4328..0a363bb 100644
--- a/Example/Pods/RxSwift/RxSwift/Disposables/DisposeBase.swift
+++ b/Example/Pods/RxSwift/RxSwift/Disposables/DisposeBase.swift
@@ -1,6 +1,6 @@
 //
 //  DisposeBase.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 4/4/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,19 +8,17 @@
 
 import Foundation
 
-/**
-Base class for all disposables.
-*/
+/// Base class for all disposables.
 public class DisposeBase {
     init() {
 #if TRACE_RESOURCES
-    AtomicIncrement(&resourceCount)
+    let _ = Resources.incrementTotal()
 #endif
     }
     
     deinit {
 #if TRACE_RESOURCES
-    AtomicDecrement(&resourceCount)
+    let _ = Resources.decrementTotal()
 #endif
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/NAryDisposable.swift b/Example/Pods/RxSwift/RxSwift/Disposables/NAryDisposable.swift
deleted file mode 100644
index b39cd98..0000000
--- a/Example/Pods/RxSwift/RxSwift/Disposables/NAryDisposable.swift
+++ /dev/null
@@ -1,10 +0,0 @@
-// This file is autogenerated. Take a look at `Preprocessor` target in RxSwift project 
-//
-//  NAryDisposable.swift
-//  RxSwift
-//
-//  Created by Krunoslav Zaher on 8/20/15.
-//  Copyright © 2015 Krunoslav Zaher. All rights reserved.
-//
-
-import Foundation
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/NopDisposable.swift b/Example/Pods/RxSwift/RxSwift/Disposables/NopDisposable.swift
index fe8a0c7..9f1df16 100644
--- a/Example/Pods/RxSwift/RxSwift/Disposables/NopDisposable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Disposables/NopDisposable.swift
@@ -1,6 +1,6 @@
 //
 //  NopDisposable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/15/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,25 +8,27 @@
 
 import Foundation
 
-/**
-Represents a disposable that does nothing on disposal.
-
-Nop = No Operation
-*/
-public struct NopDisposable : Disposable {
+/// Represents a disposable that does nothing on disposal.
+///
+/// Nop = No Operation
+fileprivate struct NopDisposable : Disposable {
  
-    /**
-    Singleton instance of `NopDisposable`.
-    */
-    public static let instance: Disposable = NopDisposable()
+    fileprivate static let noOp: Disposable = NopDisposable()
     
-    init() {
+    fileprivate init() {
         
     }
     
-    /**
-    Does nothing.
-    */
+    /// Does nothing.
     public func dispose() {
     }
-}
\ No newline at end of file
+}
+
+extension Disposables {
+    /**
+     Creates a disposable that does nothing on disposal.
+     */
+    static public func create() -> Disposable {
+        return NopDisposable.noOp
+    }
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/RefCountDisposable.swift b/Example/Pods/RxSwift/RxSwift/Disposables/RefCountDisposable.swift
index 2d29d74..df0ab3e 100644
--- a/Example/Pods/RxSwift/RxSwift/Disposables/RefCountDisposable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Disposables/RefCountDisposable.swift
@@ -1,6 +1,6 @@
 //
 //  RefCountDisposable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Junior B. on 10/29/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,26 +8,20 @@
 
 import Foundation
 
-/**
-    Represents a disposable resource that only disposes its underlying disposable resource when all dependent disposable objects have been disposed.
- */
-public class RefCountDisposable : DisposeBase, Cancelable {
+/// Represents a disposable resource that only disposes its underlying disposable resource when all dependent disposable objects have been disposed.
+public final class RefCountDisposable : DisposeBase, Cancelable {
     private var _lock = SpinLock()
     private var _disposable = nil as Disposable?
     private var _primaryDisposed = false
     private var _count = 0
 
-    /**
-     - returns: Was resource disposed.
-     */
-    public var disposed: Bool {
+    /// - returns: Was resource disposed.
+    public var isDisposed: Bool {
         _lock.lock(); defer { _lock.unlock() }
         return _disposable == nil
     }
 
-    /**
-     Initializes a new instance of the `RefCountDisposable`.
-     */
+    /// Initializes a new instance of the `RefCountDisposable`.
     public init(disposable: Disposable) {
         _disposable = disposable
         super.init()
@@ -43,24 +37,22 @@ public class RefCountDisposable : DisposeBase, Cancelable {
             if let _ = _disposable {
 
                 do {
-                    try incrementChecked(&_count)
+                    let _ = try incrementChecked(&_count)
                 } catch (_) {
                     rxFatalError("RefCountDisposable increment failed")
                 }
 
                 return RefCountInnerDisposable(self)
             } else {
-                return NopDisposable.instance
+                return Disposables.create()
             }
         }
     }
 
-    /**
-     Disposes the underlying disposable only when all dependent disposables have been disposed.
-     */
+    /// Disposes the underlying disposable only when all dependent disposables have been disposed.
     public func dispose() {
         let oldDisposable: Disposable? = _lock.calculateLocked {
-            if let oldDisposable = _disposable where !_primaryDisposed
+            if let oldDisposable = _disposable, !_primaryDisposed
             {
                 _primaryDisposed = true
 
@@ -79,11 +71,11 @@ public class RefCountDisposable : DisposeBase, Cancelable {
         }
     }
 
-    private func release() {
+    fileprivate func release() {
         let oldDisposable: Disposable? = _lock.calculateLocked {
             if let oldDisposable = _disposable {
                 do {
-                    try decrementChecked(&_count)
+                    let _ = try decrementChecked(&_count)
                 } catch (_) {
                     rxFatalError("RefCountDisposable decrement on release failed")
                 }
@@ -110,7 +102,7 @@ public class RefCountDisposable : DisposeBase, Cancelable {
 internal final class RefCountInnerDisposable: DisposeBase, Disposable
 {
     private let _parent: RefCountDisposable
-    private var _disposed: AtomicInt = 0
+    private var _isDisposed: AtomicInt = 0
 
     init(_ parent: RefCountDisposable)
     {
@@ -120,7 +112,7 @@ internal final class RefCountInnerDisposable: DisposeBase, Disposable
 
     internal func dispose()
     {
-        if AtomicCompareAndSwap(0, 1, &_disposed) {
+        if AtomicCompareAndSwap(0, 1, &_isDisposed) {
             _parent.release()
         }
     }
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/ScheduledDisposable.swift b/Example/Pods/RxSwift/RxSwift/Disposables/ScheduledDisposable.swift
index ac73499..a922600 100644
--- a/Example/Pods/RxSwift/RxSwift/Disposables/ScheduledDisposable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Disposables/ScheduledDisposable.swift
@@ -8,27 +8,23 @@
 
 import Foundation
 
-private let disposeScheduledDisposable: ScheduledDisposable -> Disposable = { sd in
+private let disposeScheduledDisposable: (ScheduledDisposable) -> Disposable = { sd in
     sd.disposeInner()
-    return NopDisposable.instance
+    return Disposables.create()
 }
 
-/**
-Represents a disposable resource whose disposal invocation will be scheduled on the specified scheduler.
-*/
-public class ScheduledDisposable : Cancelable {
+/// Represents a disposable resource whose disposal invocation will be scheduled on the specified scheduler.
+public final class ScheduledDisposable : Cancelable {
     public let scheduler: ImmediateSchedulerType
 
-    private var _disposed: AtomicInt = 0
+    private var _isDisposed: AtomicInt = 0
 
     // state
     private var _disposable: Disposable?
 
-    /**
-    - returns: Was resource disposed.
-    */
-    public var disposed: Bool {
-        return _disposed == 1
+    /// - returns: Was resource disposed.
+    public var isDisposed: Bool {
+        return _isDisposed == 1
     }
 
     /**
@@ -42,15 +38,13 @@ public class ScheduledDisposable : Cancelable {
         _disposable = disposable
     }
 
-    /**
-    Disposes the wrapped disposable on the provided scheduler.
-    */
+    /// Disposes the wrapped disposable on the provided scheduler.
     public func dispose() {
-        scheduler.schedule(self, action: disposeScheduledDisposable)
+        let _ = scheduler.schedule(self, action: disposeScheduledDisposable)
     }
 
     func disposeInner() {
-        if AtomicCompareAndSwap(0, 1, &_disposed) {
+        if AtomicCompareAndSwap(0, 1, &_isDisposed) {
             _disposable!.dispose()
             _disposable = nil
         }
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/SerialDisposable.swift b/Example/Pods/RxSwift/RxSwift/Disposables/SerialDisposable.swift
index cb5c4e3..a87814f 100644
--- a/Example/Pods/RxSwift/RxSwift/Disposables/SerialDisposable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Disposables/SerialDisposable.swift
@@ -1,6 +1,6 @@
 //
 //  SerialDisposable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/12/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,26 +8,20 @@
 
 import Foundation
 
-/**
-Represents a disposable resource whose underlying disposable resource can be replaced by another disposable resource, causing automatic disposal of the previous underlying disposable resource.
-*/
-public class SerialDisposable : DisposeBase, Cancelable {
+/// Represents a disposable resource whose underlying disposable resource can be replaced by another disposable resource, causing automatic disposal of the previous underlying disposable resource.
+public final class SerialDisposable : DisposeBase, Cancelable {
     private var _lock = SpinLock()
     
     // state
     private var _current = nil as Disposable?
-    private var _disposed = false
+    private var _isDisposed = false
     
-    /**
-    - returns: Was resource disposed.
-    */
-    public var disposed: Bool {
-        return _disposed
+    /// - returns: Was resource disposed.
+    public var isDisposed: Bool {
+        return _isDisposed
     }
     
-    /**
-    Initializes a new instance of the `SerialDisposable`.
-    */
+    /// Initializes a new instance of the `SerialDisposable`.
     override public init() {
         super.init()
     }
@@ -47,7 +41,7 @@ public class SerialDisposable : DisposeBase, Cancelable {
         }
         set (newDisposable) {
             let disposable: Disposable? = _lock.calculateLocked {
-                if _disposed {
+                if _isDisposed {
                     return newDisposable
                 }
                 else {
@@ -63,23 +57,21 @@ public class SerialDisposable : DisposeBase, Cancelable {
         }
     }
     
-    /**
-    Disposes the underlying disposable as well as all future replacements.
-    */
+    /// Disposes the underlying disposable as well as all future replacements.
     public func dispose() {
         _dispose()?.dispose()
     }
 
     private func _dispose() -> Disposable? {
         _lock.lock(); defer { _lock.unlock() }
-        if _disposed {
+        if _isDisposed {
             return nil
         }
         else {
-            _disposed = true
+            _isDisposed = true
             let current = _current
             _current = nil
             return current
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/SingleAssignmentDisposable.swift b/Example/Pods/RxSwift/RxSwift/Disposables/SingleAssignmentDisposable.swift
index 9fedf5f..18d27ec 100644
--- a/Example/Pods/RxSwift/RxSwift/Disposables/SingleAssignmentDisposable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Disposables/SingleAssignmentDisposable.swift
@@ -1,6 +1,6 @@
 //
 //  SingleAssignmentDisposable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/15/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -14,76 +14,84 @@ Represents a disposable resource which only allows a single assignment of its un
 If an underlying disposable resource has already been set, future attempts to set the underlying disposable resource will throw an exception.
 */
 public class SingleAssignmentDisposable : DisposeBase, Disposable, Cancelable {
-    private var _lock = SpinLock()
-    
+#if os(Linux)
+    fileprivate let _lock = SpinLock()
+#endif
+
+    fileprivate enum DisposeState: UInt32 {
+        case disposed = 1
+        case disposableSet = 2
+    }
+
+    // Jeej, swift API consistency rules
+    fileprivate enum DisposeStateInt32: Int32 {
+        case disposed = 1
+        case disposableSet = 2
+    }
+
     // state
-    private var _disposed = false
-    private var _disposableSet = false
+    private var _state: UInt32 = 0
     private var _disposable = nil as Disposable?
 
-    /**
-    - returns: A value that indicates whether the object is disposed.
-    */
-    public var disposed: Bool {
-        return _disposed
+    /// - returns: A value that indicates whether the object is disposed.
+    public var isDisposed: Bool {
+        return (_state & DisposeState.disposed.rawValue) != 0
     }
 
-    /**
-    Initializes a new instance of the `SingleAssignmentDisposable`.
-    */
+    /// Initializes a new instance of the `SingleAssignmentDisposable`.
     public override init() {
         super.init()
     }
 
-    /**
-    Gets or sets the underlying disposable. After disposal, the result of getting this property is undefined.
-    
-    **Throws exception if the `SingleAssignmentDisposable` has already been assigned to.**
-    */
-    public var disposable: Disposable {
-        get {
-            _lock.lock(); defer { _lock.unlock() }
-            return _disposable ?? NopDisposable.instance
-        }
-        set {
-            _setDisposable(newValue)?.dispose()
-        }
-    }
+    /// Gets or sets the underlying disposable. After disposal, the result of getting this property is undefined.
+    ///
+    /// **Throws exception if the `SingleAssignmentDisposable` has already been assigned to.**
+    public func setDisposable(_ disposable: Disposable) {
+        _disposable = disposable
 
-    private func _setDisposable(newValue: Disposable) -> Disposable? {
-        _lock.lock(); defer { _lock.unlock() }
-        if _disposableSet {
+        #if os(Linux)
+        _lock.lock()
+        let previousState = Int32(_state)
+        _state = _state | DisposeState.disposableSet.rawValue
+        // We know about `defer { _lock.unlock() }`, but this resolves Swift compiler bug. Using `defer` here causes anomaly.
+        _lock.unlock()
+        #else
+        let previousState = OSAtomicOr32OrigBarrier(DisposeState.disposableSet.rawValue, &_state)
+        #endif
+        
+        if (previousState & DisposeStateInt32.disposableSet.rawValue) != 0 {
             rxFatalError("oldState.disposable != nil")
         }
 
-        _disposableSet = true
-
-        if _disposed {
-            return newValue
+        if (previousState & DisposeStateInt32.disposed.rawValue) != 0 {
+            disposable.dispose()
+            _disposable = nil
         }
-
-        _disposable = newValue
-
-        return nil
     }
 
-    /**
-    Disposes the underlying disposable.
-    */
+    /// Disposes the underlying disposable.
     public func dispose() {
-        if _disposed {
+        #if os(Linux)
+        _lock.lock()
+        let previousState = Int32(_state)
+        _state = _state | DisposeState.disposed.rawValue
+        // We know about `defer { _lock.unlock() }`, but this resolves Swift compiler bug. Using `defer` here causes anomaly.
+        _lock.unlock()
+        #else
+        let previousState = OSAtomicOr32OrigBarrier(DisposeState.disposed.rawValue, &_state)
+        #endif
+
+        if (previousState & DisposeStateInt32.disposed.rawValue) != 0 {
             return
         }
-        _dispose()?.dispose()
-    }
 
-    private func _dispose() -> Disposable? {
-        _lock.lock(); defer { _lock.unlock() }
-
-        _disposed = true
-        let disposable = _disposable
-        _disposable = nil
-
-        return disposable
+        if (previousState & DisposeStateInt32.disposableSet.rawValue) != 0 {
+            guard let disposable = _disposable else {
+                rxFatalError("Disposable not set")
+            }
+            disposable.dispose()
+            _disposable = nil
+        }
     }
+
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/StableCompositeDisposable.swift b/Example/Pods/RxSwift/RxSwift/Disposables/StableCompositeDisposable.swift
deleted file mode 100644
index 54162d2..0000000
--- a/Example/Pods/RxSwift/RxSwift/Disposables/StableCompositeDisposable.swift
+++ /dev/null
@@ -1,15 +0,0 @@
-//
-//  StableCompositeDisposable.swift
-//  RxSwift
-//
-//  Created by Krunoslav Zaher on 6/12/15.
-//  Copyright © 2015 Krunoslav Zaher. All rights reserved.
-//
-
-import Foundation
-
-public final class StableCompositeDisposable {
-    public static func create(disposable1: Disposable, _ disposable2: Disposable) -> Disposable {
-        return BinaryDisposable(disposable1, disposable2)
-    }
-}
\ No newline at end of file
diff --git a/Example/Pods/RxSwift/RxSwift/Disposables/SubscriptionDisposable.swift b/Example/Pods/RxSwift/RxSwift/Disposables/SubscriptionDisposable.swift
index 7a3e1e9..9a3d639 100644
--- a/Example/Pods/RxSwift/RxSwift/Disposables/SubscriptionDisposable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Disposables/SubscriptionDisposable.swift
@@ -1,6 +1,6 @@
 //
 //  SubscriptionDisposable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 10/25/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -20,4 +20,4 @@ struct SubscriptionDisposable<T: SynchronizedUnsubscribeType> : Disposable {
     func dispose() {
         _owner?.synchronizedUnsubscribe(_key)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Errors.swift b/Example/Pods/RxSwift/RxSwift/Errors.swift
index ccb71c1..92cb2f1 100644
--- a/Example/Pods/RxSwift/RxSwift/Errors.swift
+++ b/Example/Pods/RxSwift/RxSwift/Errors.swift
@@ -1,6 +1,6 @@
 //
 //  Errors.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/28/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -11,62 +11,44 @@ import Foundation
 let RxErrorDomain       = "RxErrorDomain"
 let RxCompositeFailures = "RxCompositeFailures"
 
-/**
-Generic Rx error codes.
-*/
+/// Generic Rx error codes.
 public enum RxError
-    : ErrorType
+    : Swift.Error
     , CustomDebugStringConvertible {
-    /**
-    Unknown error occured.
-    */
-    case Unknown
-    /**
-    Performing an action on disposed object.
-    */
-    case Disposed(object: AnyObject)
-    /**
-    Aritmetic overflow error.
-    */
-    case Overflow
-    /**
-    Argument out of range error.
-    */
-    case ArgumentOutOfRange
-    /**
-    Sequence doesn't contain any elements.
-    */
-    case NoElements
-    /**
-    Sequence contains more than one element.
-    */
-    case MoreThanOneElement
-    /**
-     Timeout error.
-     */
-    case Timeout
+    /// Unknown error occured.
+    case unknown
+    /// Performing an action on disposed object.
+    case disposed(object: AnyObject)
+    /// Aritmetic overflow error.
+    case overflow
+    /// Argument out of range error.
+    case argumentOutOfRange
+    /// Sequence doesn't contain any elements.
+    case noElements
+    /// Sequence contains more than one element.
+    case moreThanOneElement
+    /// Timeout error.
+    case timeout
 }
 
-public extension RxError {
-    /**
-     A textual representation of `self`, suitable for debugging.
-    */
+extension RxError {
+    /// A textual representation of `self`, suitable for debugging.
     public var debugDescription: String {
         switch self {
-        case .Unknown:
+        case .unknown:
             return "Unknown error occured."
-        case .Disposed(let object):
+        case .disposed(let object):
             return "Object `\(object)` was already disposed."
-        case .Overflow:
+        case .overflow:
             return "Arithmetic overflow occured."
-        case .ArgumentOutOfRange:
+        case .argumentOutOfRange:
             return "Argument out of range."
-        case .NoElements:
+        case .noElements:
             return "Sequence doesn't contain any elements."
-        case .MoreThanOneElement:
+        case .moreThanOneElement:
             return "Sequence contains more than one element."
-        case .Timeout:
+        case .timeout:
             return "Sequence timeout."
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Event.swift b/Example/Pods/RxSwift/RxSwift/Event.swift
index 46e5f1b..d0f995c 100644
--- a/Example/Pods/RxSwift/RxSwift/Event.swift
+++ b/Example/Pods/RxSwift/RxSwift/Event.swift
@@ -1,6 +1,6 @@
 //
 //  Event.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/8/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,59 +8,77 @@
 
 import Foundation
 
-/**
-Represents a sequence event.
-
-Sequence grammar:
-Next\* (Error | Completed)
-*/
+/// Represents a sequence event.
+///
+/// Sequence grammar: 
+/// **next\* (error | completed)**
 public enum Event<Element> {
     /// Next element is produced.
-    case Next(Element)
+    case next(Element)
 
     /// Sequence terminated with an error.
-    case Error(ErrorType)
+    case error(Swift.Error)
 
     /// Sequence completed successfully.
-    case Completed
+    case completed
 }
 
 extension Event : CustomDebugStringConvertible {
     /// - returns: Description of event.
     public var debugDescription: String {
         switch self {
-        case .Next(let value):
-            return "Next(\(value))"
-        case .Error(let error):
-            return "Error(\(error))"
-        case .Completed:
-            return "Completed"
+        case .next(let value):
+            return "next(\(value))"
+        case .error(let error):
+            return "error(\(error))"
+        case .completed:
+            return "completed"
         }
     }
 }
 
 extension Event {
-    /// - returns: Is `Completed` or `Error` event.
+    /// Is `Completed` or `Error` event.
     public var isStopEvent: Bool {
         switch self {
-        case .Next: return false
-        case .Error, .Completed: return true
+        case .next: return false
+        case .error, .completed: return true
         }
     }
 
-    /// - returns: If `Next` event, returns element value.
+    /// If `Next` event, returns element value.
     public var element: Element? {
-        if case .Next(let value) = self {
+        if case .next(let value) = self {
             return value
         }
         return nil
     }
 
-    /// - returns: If `Error` event, returns error.
-    public var error: ErrorType? {
-        if case .Error(let error) = self {
+    /// If `Error` event, returns error.
+    public var error: Swift.Error? {
+        if case .error(let error) = self {
             return error
         }
         return nil
     }
 }
+
+extension Event {
+    /// Maps sequence elements using transform. If error happens during the transform .error
+    /// will be returned as value
+    public func map<Result>(_ transform: (Element) throws -> Result) -> Event<Result> {
+        do {
+            switch self {
+            case let .next(element):
+                return .next(try transform(element))
+            case let .error(error):
+                return .error(error)
+            case .completed:
+                return .completed
+            }
+        }
+        catch let e {
+            return .error(e)
+        }
+    }
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Extensions/Bag+Rx.swift b/Example/Pods/RxSwift/RxSwift/Extensions/Bag+Rx.swift
new file mode 100644
index 0000000..7a917e3
--- /dev/null
+++ b/Example/Pods/RxSwift/RxSwift/Extensions/Bag+Rx.swift
@@ -0,0 +1,58 @@
+//
+//  Bag+Rx.swift
+//  RxSwift
+//
+//  Created by Krunoslav Zaher on 10/19/16.
+//  Copyright © 2016 Krunoslav Zaher. All rights reserved.
+//
+
+import Foundation
+
+
+// MARK: forEach
+
+extension Bag where T: ObserverType {
+    /// Dispatches `event` to app observers contained inside bag.
+    ///
+    /// - parameter action: Enumeration closure.
+    func on(_ event: Event<T.E>) {
+        if _onlyFastPath {
+            _value0?.on(event)
+            return
+        }
+
+        let value0 = _value0
+        let dictionary = _dictionary
+
+        if let value0 = value0 {
+            value0.on(event)
+        }
+
+        if let dictionary = dictionary {
+            for element in dictionary.values {
+                element.on(event)
+            }
+        }
+    }
+}
+
+/// Dispatches `dispose` to all disposables contained inside bag.
+func disposeAll(in bag: Bag<Disposable>) {
+    if bag._onlyFastPath {
+        bag._value0?.dispose()
+        return
+    }
+
+    let value0 = bag._value0
+    let dictionary = bag._dictionary
+
+    if let value0 = value0 {
+        value0.dispose()
+    }
+
+    if let dictionary = dictionary {
+        for element in dictionary.values {
+            element.dispose()
+        }
+    }
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Extensions/String+Rx.swift b/Example/Pods/RxSwift/RxSwift/Extensions/String+Rx.swift
index 430fc3a..40fd9a8 100644
--- a/Example/Pods/RxSwift/RxSwift/Extensions/String+Rx.swift
+++ b/Example/Pods/RxSwift/RxSwift/Extensions/String+Rx.swift
@@ -1,6 +1,6 @@
 //
 //  String+Rx.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 12/25/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,13 +9,11 @@
 import Foundation
 
 extension String {
-    /**
-     This is needed because on Linux Swift doesn't have `rangeOfString(..., options: .BackwardsSearch)`
-    */
-    func lastIndexOf(character: Character) -> Index? {
+    /// This is needed because on Linux Swift doesn't have `rangeOfString(..., options: .BackwardsSearch)`
+    func lastIndexOf(_ character: Character) -> Index? {
         var index = endIndex
         while index > startIndex {
-            index = index.predecessor()
+            index = self.index(before: index)
             if self[index] == character {
                 return index
             }
@@ -23,4 +21,4 @@ extension String {
 
         return nil
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/ImmediateSchedulerType.swift b/Example/Pods/RxSwift/RxSwift/ImmediateSchedulerType.swift
index 08df61b..fa0c2d3 100644
--- a/Example/Pods/RxSwift/RxSwift/ImmediateSchedulerType.swift
+++ b/Example/Pods/RxSwift/RxSwift/ImmediateSchedulerType.swift
@@ -8,9 +8,7 @@
 
 import Foundation
 
-/**
-Represents an object that immediately schedules units of work.
-*/
+/// Represents an object that immediately schedules units of work.
 public protocol ImmediateSchedulerType {
     /**
     Schedules an action to be executed immediatelly.
@@ -19,7 +17,7 @@ public protocol ImmediateSchedulerType {
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    func schedule<StateType>(state: StateType, action: (StateType) -> Disposable) -> Disposable
+    func schedule<StateType>(_ state: StateType, action: @escaping (StateType) -> Disposable) -> Disposable
 }
 
 extension ImmediateSchedulerType {
@@ -30,11 +28,11 @@ extension ImmediateSchedulerType {
     - parameter action: Action to execute recursively. The last parameter passed to the action is used to trigger recursive scheduling of the action, passing in recursive invocation state.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    public func scheduleRecursive<State>(state: State, action: (state: State, recurse: (State) -> ()) -> ()) -> Disposable {
+    public func scheduleRecursive<State>(_ state: State, action: @escaping (_ state: State, _ recurse: (State) -> ()) -> ()) -> Disposable {
         let recursiveScheduler = RecursiveImmediateScheduler(action: action, scheduler: self)
         
         recursiveScheduler.schedule(state)
         
-        return AnonymousDisposable(recursiveScheduler.dispose)
+        return Disposables.create(with: recursiveScheduler.dispose)
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Observable.swift b/Example/Pods/RxSwift/RxSwift/Observable.swift
index 31e2e65..f394063 100644
--- a/Example/Pods/RxSwift/RxSwift/Observable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observable.swift
@@ -1,6 +1,6 @@
 //
 //  Observable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/8/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,24 +8,20 @@
 
 import Foundation
 
-/**
-A type-erased `ObservableType`. 
-
-It represents a push style sequence.
-*/
+/// A type-erased `ObservableType`. 
+///
+/// It represents a push style sequence.
 public class Observable<Element> : ObservableType {
-    /**
-    Type of elements in sequence.
-    */
+    /// Type of elements in sequence.
     public typealias E = Element
     
     init() {
 #if TRACE_RESOURCES
-        OSAtomicIncrement32(&resourceCount)
+        let _ = Resources.incrementTotal()
 #endif
     }
     
-    public func subscribe<O: ObserverType where O.E == E>(observer: O) -> Disposable {
+    public func subscribe<O: ObserverType>(_ observer: O) -> Disposable where O.E == E {
         abstractMethod()
     }
     
@@ -35,17 +31,16 @@ public class Observable<Element> : ObservableType {
     
     deinit {
 #if TRACE_RESOURCES
-        AtomicDecrement(&resourceCount)
+        let _ = Resources.decrementTotal()
 #endif
     }
 
     // this is kind of ugly I know :(
     // Swift compiler reports "Not supported yet" when trying to override protocol extensions, so ¯\_(ツ)_/¯
 
-    /**
-    Optimizations for map operator
-    */
-    internal func composeMap<R>(selector: Element throws -> R) -> Observable<R> {
-        return Map(source: self, selector: selector)
+    /// Optimizations for map operator
+    internal func composeMap<R>(_ selector: @escaping (Element) throws -> R) -> Observable<R> {
+        return Map(source: self, transform: selector)
     }
 }
+
diff --git a/Example/Pods/RxSwift/RxSwift/ObservableConvertibleType.swift b/Example/Pods/RxSwift/RxSwift/ObservableConvertibleType.swift
index a749a06..2a94d63 100644
--- a/Example/Pods/RxSwift/RxSwift/ObservableConvertibleType.swift
+++ b/Example/Pods/RxSwift/RxSwift/ObservableConvertibleType.swift
@@ -1,6 +1,6 @@
 //
 //  ObservableConvertibleType.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 9/17/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,19 +8,13 @@
 
 import Foundation
 
-/**
-Type that can be converted to observable sequence (`Observer<E>`).
-*/
+/// Type that can be converted to observable sequence (`Observer<E>`).
 public protocol ObservableConvertibleType {
-    /**
-    Type of elements in sequence.
-    */
+    /// Type of elements in sequence.
     associatedtype E
-    
-    /**
-    Converts `self` to `Observable` sequence.
-    
-    - returns: Observable sequence that represents `self`.
-    */
+
+    /// Converts `self` to `Observable` sequence.
+    ///
+    /// - returns: Observable sequence that represents `self`.
     func asObservable() -> Observable<E>
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Observable+Extensions.swift b/Example/Pods/RxSwift/RxSwift/ObservableType+Extensions.swift
similarity index 51%
rename from Example/Pods/RxSwift/RxSwift/Observable+Extensions.swift
rename to Example/Pods/RxSwift/RxSwift/ObservableType+Extensions.swift
index c44b9b0..ea225ab 100644
--- a/Example/Pods/RxSwift/RxSwift/Observable+Extensions.swift
+++ b/Example/Pods/RxSwift/RxSwift/ObservableType+Extensions.swift
@@ -1,6 +1,6 @@
 //
-//  Observable+Extensions.swift
-//  Rx
+//  ObservableType+Extensions.swift
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/21/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -15,15 +15,15 @@ extension ObservableType {
     - parameter on: Action to invoke for each event in the observable sequence.
     - returns: Subscription object used to unsubscribe from the observable sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func subscribe(on: (event: Event<E>) -> Void)
+    public func subscribe(_ on: @escaping (Event<E>) -> Void)
         -> Disposable {
         let observer = AnonymousObserver { e in
-            on(event: e)
+            on(e)
         }
         return self.subscribeSafe(observer)
     }
 
+    #if DEBUG
     /**
     Subscribes an element handler, an error handler, a completion handler and disposed handler to an observable sequence.
 
@@ -34,95 +34,86 @@ extension ObservableType {
         gracefully completed, errored, or if the generation is cancelled by disposing subscription).
     - returns: Subscription object used to unsubscribe from the observable sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func subscribe(onNext onNext: (E -> Void)? = nil, onError: (ErrorType -> Void)? = nil, onCompleted: (() -> Void)? = nil, onDisposed: (() -> Void)? = nil)
+    public func subscribe(file: String = #file, line: UInt = #line, function: String = #function, onNext: ((E) -> Void)? = nil, onError: ((Swift.Error) -> Void)? = nil, onCompleted: (() -> Void)? = nil, onDisposed: (() -> Void)? = nil)
         -> Disposable {
 
         let disposable: Disposable
 
         if let disposed = onDisposed {
-            disposable = AnonymousDisposable(disposed)
+            disposable = Disposables.create(with: disposed)
         }
         else {
-            disposable = NopDisposable.instance
+            disposable = Disposables.create()
         }
 
         let observer = AnonymousObserver<E> { e in
             switch e {
-            case .Next(let value):
+            case .next(let value):
                 onNext?(value)
-            case .Error(let e):
-                onError?(e)
+            case .error(let e):
+                if let onError = onError {
+                    onError(e)
+                }
+                else {
+                    print("Received unhandled error: \(file):\(line):\(function) -> \(e)")
+                }
                 disposable.dispose()
-            case .Completed:
+            case .completed:
                 onCompleted?()
                 disposable.dispose()
             }
         }
-        return BinaryDisposable(
+        return Disposables.create(
             self.subscribeSafe(observer),
             disposable
         )
     }
-
+    #else
     /**
-    Subscribes an element handler to an observable sequence.
+    Subscribes an element handler, an error handler, a completion handler and disposed handler to an observable sequence.
 
     - parameter onNext: Action to invoke for each element in the observable sequence.
+    - parameter onError: Action to invoke upon errored termination of the observable sequence.
+    - parameter onCompleted: Action to invoke upon graceful termination of the observable sequence.
+    - parameter onDisposed: Action to invoke upon any type of termination of sequence (if the sequence has
+        gracefully completed, errored, or if the generation is cancelled by disposing subscription).
     - returns: Subscription object used to unsubscribe from the observable sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func subscribeNext(onNext: (E) -> Void)
+    public func subscribe(onNext: ((E) -> Void)? = nil, onError: ((Swift.Error) -> Void)? = nil, onCompleted: (() -> Void)? = nil, onDisposed: (() -> Void)? = nil)
         -> Disposable {
-        let observer = AnonymousObserver<E> { e in
-            if case .Next(let value) = e {
-                onNext(value)
-            }
-        }
-        return self.subscribeSafe(observer)
-    }
 
-    /**
-    Subscribes an error handler to an observable sequence.
+        let disposable: Disposable
 
-    - parameter onError: Action to invoke upon errored termination of the observable sequence.
-    - returns: Subscription object used to unsubscribe from the observable sequence.
-    */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func subscribeError(onError: (ErrorType) -> Void)
-        -> Disposable {
-        let observer = AnonymousObserver<E> { e in
-            if case .Error(let error) = e {
-                onError(error)
-            }
+        if let disposed = onDisposed {
+            disposable = Disposables.create(with: disposed)
+        }
+        else {
+            disposable = Disposables.create()
         }
-        return self.subscribeSafe(observer)
-    }
-
-    /**
-    Subscribes a completion handler to an observable sequence.
 
-    - parameter onCompleted: Action to invoke upon graceful termination of the observable sequence.
-    - returns: Subscription object used to unsubscribe from the observable sequence.
-    */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func subscribeCompleted(onCompleted: () -> Void)
-        -> Disposable {
         let observer = AnonymousObserver<E> { e in
-            if case .Completed = e {
-                onCompleted()
+            switch e {
+            case .next(let value):
+                onNext?(value)
+            case .error(let e):
+                onError?(e)
+                disposable.dispose()
+            case .completed:
+                onCompleted?()
+                disposable.dispose()
             }
         }
-        return self.subscribeSafe(observer)
+        return Disposables.create(
+            self.subscribeSafe(observer),
+            disposable
+        )
     }
+    #endif
 }
 
-public extension ObservableType {
-    /**
-    All internal subscribe calls go through this method.
-    */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    func subscribeSafe<O: ObserverType where O.E == E>(observer: O) -> Disposable {
+extension ObservableType {
+    /// All internal subscribe calls go through this method.
+    func subscribeSafe<O: ObserverType>(_ observer: O) -> Disposable where O.E == E {
         return self.asObservable().subscribe(observer)
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/ObservableType.swift b/Example/Pods/RxSwift/RxSwift/ObservableType.swift
index 93723e3..7fd799c 100644
--- a/Example/Pods/RxSwift/RxSwift/ObservableType.swift
+++ b/Example/Pods/RxSwift/RxSwift/ObservableType.swift
@@ -8,13 +8,9 @@
 
 import Foundation
 
-/**
-Represents a push style sequence.
-*/
+/// Represents a push style sequence.
 public protocol ObservableType : ObservableConvertibleType {
-    /**
-    Type of elements in sequence.
-    */
+    /// Type of elements in sequence.
     associatedtype E
     
     /**
@@ -40,18 +36,17 @@ public protocol ObservableType : ObservableConvertibleType {
     
     - returns: Subscription for `observer` that can be used to cancel production of sequence elements and free resources.
     */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    func subscribe<O: ObserverType where O.E == E>(observer: O) -> Disposable
-   
+    func subscribe<O: ObserverType>(_ observer: O) -> Disposable where O.E == E
 }
 
 extension ObservableType {
     
-    /**
-    Default implementation of converting `ObservableType` to `Observable`.
-    */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    /// Default implementation of converting `ObservableType` to `Observable`.
     public func asObservable() -> Observable<E> {
-        return Observable.create(self.subscribe)
+        // temporary workaround
+        //return Observable.create(subscribe: self.subscribe)
+        return Observable.create { o in
+            return self.subscribe(o)
+        }
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/AddRef.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/AddRef.swift
index 50358ec..36f9d79 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/AddRef.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/AddRef.swift
@@ -1,6 +1,6 @@
 //
 //  AddRef.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Junior B. on 30/10/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -11,15 +11,15 @@ import Foundation
 class AddRefSink<O: ObserverType> : Sink<O>, ObserverType {
     typealias Element = O.E
     
-    override init(observer: O) {
-        super.init(observer: observer)
+    override init(observer: O, cancel: Cancelable) {
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         switch event {
-        case .Next(_):
+        case .next(_):
             forwardOn(event)
-        case .Completed, .Error(_):
+        case .completed, .error(_):
             forwardOn(event)
             dispose()
         }
@@ -27,7 +27,7 @@ class AddRefSink<O: ObserverType> : Sink<O>, ObserverType {
 }
 
 class AddRef<Element> : Producer<Element> {
-    typealias EventHandler = Event<Element> throws -> Void
+    typealias EventHandler = (Event<Element>) throws -> Void
     
     private let _source: Observable<Element>
     private let _refCount: RefCountDisposable
@@ -37,11 +37,11 @@ class AddRef<Element> : Producer<Element> {
         _refCount = refCount
     }
     
-    override func run<O: ObserverType where O.E == Element>(observer: O) -> Disposable {
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
         let releaseDisposable = _refCount.retain()
-        let sink = AddRefSink(observer: observer)
-        sink.disposable = StableCompositeDisposable.create(releaseDisposable, _source.subscribeSafe(sink))
+        let sink = AddRefSink(observer: observer, cancel: cancel)
+        let subscription = Disposables.create(releaseDisposable, _source.subscribeSafe(sink))
 
-        return sink
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Amb.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Amb.swift
index 874d5a1..f880354 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Amb.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Amb.swift
@@ -9,24 +9,24 @@
 import Foundation
 
 enum AmbState {
-    case Neither
-    case Left
-    case Right
+    case neither
+    case left
+    case right
 }
 
-class AmbObserver<ElementType, O: ObserverType where O.E == ElementType> : ObserverType {
+class AmbObserver<ElementType, O: ObserverType> : ObserverType where O.E == ElementType {
     typealias Element = ElementType
     typealias Parent = AmbSink<ElementType, O>
     typealias This = AmbObserver<ElementType, O>
     typealias Sink = (This, Event<Element>) -> Void
     
-    private let _parent: Parent
-    private var _sink: Sink
-    private var _cancel: Disposable
+    fileprivate let _parent: Parent
+    fileprivate var _sink: Sink
+    fileprivate var _cancel: Disposable
     
-    init(parent: Parent, cancel: Disposable, sink: Sink) {
+    init(parent: Parent, cancel: Disposable, sink: @escaping Sink) {
 #if TRACE_RESOURCES
-        AtomicIncrement(&resourceCount)
+        let _ = Resources.incrementTotal()
 #endif
         
         _parent = parent
@@ -34,7 +34,7 @@ class AmbObserver<ElementType, O: ObserverType where O.E == ElementType> : Obser
         _cancel = cancel
     }
     
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         _sink(self, event)
         if event.isStopEvent {
             _cancel.dispose()
@@ -43,12 +43,12 @@ class AmbObserver<ElementType, O: ObserverType where O.E == ElementType> : Obser
     
     deinit {
 #if TRACE_RESOURCES
-        AtomicDecrement(&resourceCount)
+        let _ = Resources.decrementTotal()
 #endif
     }
 }
 
-class AmbSink<ElementType, O: ObserverType where O.E == ElementType> : Sink<O> {
+class AmbSink<ElementType, O: ObserverType> : Sink<O> where O.E == ElementType {
     typealias Parent = Amb<ElementType>
     typealias AmbObserverType = AmbObserver<ElementType, O>
 
@@ -56,17 +56,17 @@ class AmbSink<ElementType, O: ObserverType where O.E == ElementType> : Sink<O> {
     
     private let _lock = NSRecursiveLock()
     // state
-    private var _choice = AmbState.Neither
+    private var _choice = AmbState.neither
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
         let subscription1 = SingleAssignmentDisposable()
         let subscription2 = SingleAssignmentDisposable()
-        let disposeAll = StableCompositeDisposable.create(subscription1, subscription2)
+        let disposeAll = Disposables.create(subscription1, subscription2)
         
         let forwardEvent = { (o: AmbObserverType, event: Event<ElementType>) -> Void in
             self.forwardOn(event)
@@ -74,7 +74,7 @@ class AmbSink<ElementType, O: ObserverType where O.E == ElementType> : Sink<O> {
         
         let decide = { (o: AmbObserverType, event: Event<ElementType>, me: AmbState, otherSubscription: Disposable) in
             self._lock.performLocked {
-                if self._choice == .Neither {
+                if self._choice == .neither {
                     self._choice = me
                     o._sink = forwardEvent
                     o._cancel = disposeAll
@@ -91,32 +91,32 @@ class AmbSink<ElementType, O: ObserverType where O.E == ElementType> : Sink<O> {
         }
         
         let sink1 = AmbObserver(parent: self, cancel: subscription1) { o, e in
-            decide(o, e, .Left, subscription2)
+            decide(o, e, .left, subscription2)
         }
         
         let sink2 = AmbObserver(parent: self, cancel: subscription1) { o, e in
-            decide(o, e, .Right, subscription1)
+            decide(o, e, .right, subscription1)
         }
         
-        subscription1.disposable = _parent._left.subscribe(sink1)
-        subscription2.disposable = _parent._right.subscribe(sink2)
+        subscription1.setDisposable(_parent._left.subscribe(sink1))
+        subscription2.setDisposable(_parent._right.subscribe(sink2))
         
         return disposeAll
     }
 }
 
 class Amb<Element>: Producer<Element> {
-    private let _left: Observable<Element>
-    private let _right: Observable<Element>
+    fileprivate let _left: Observable<Element>
+    fileprivate let _right: Observable<Element>
     
     init(left: Observable<Element>, right: Observable<Element>) {
         _left = left
         _right = right
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = AmbSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = AmbSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/AnonymousObservable.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/AnonymousObservable.swift
index 11346a9..bf3627a 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/AnonymousObservable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/AnonymousObservable.swift
@@ -1,6 +1,6 @@
 //
 //  AnonymousObservable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/8/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -15,18 +15,18 @@ class AnonymousObservableSink<O: ObserverType> : Sink<O>, ObserverType {
     // state
     private var _isStopped: AtomicInt = 0
 
-    override init(observer: O) {
-        super.init(observer: observer)
+    override init(observer: O, cancel: Cancelable) {
+        super.init(observer: observer, cancel: cancel)
     }
 
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         switch event {
-        case .Next:
+        case .next:
             if _isStopped == 1 {
                 return
             }
             forwardOn(event)
-        case .Error, .Completed:
+        case .error, .completed:
             if AtomicCompareAndSwap(0, 1, &_isStopped) {
                 forwardOn(event)
                 dispose()
@@ -34,7 +34,7 @@ class AnonymousObservableSink<O: ObserverType> : Sink<O>, ObserverType {
         }
     }
 
-    func run(parent: Parent) -> Disposable {
+    func run(_ parent: Parent) -> Disposable {
         return parent._subscribeHandler(AnyObserver(self))
     }
 }
@@ -44,13 +44,13 @@ class AnonymousObservable<Element> : Producer<Element> {
 
     let _subscribeHandler: SubscribeHandler
 
-    init(_ subscribeHandler: SubscribeHandler) {
+    init(_ subscribeHandler: @escaping SubscribeHandler) {
         _subscribeHandler = subscribeHandler
     }
 
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = AnonymousObservableSink(observer: observer)
-        sink.disposable = sink.run(self)
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = AnonymousObservableSink(observer: observer, cancel: cancel)
+        let subscription = sink.run(self)
+        return (sink: sink, subscription: subscription)
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Buffer.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Buffer.swift
index 2da636d..c773f47 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Buffer.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Buffer.swift
@@ -1,6 +1,6 @@
 //
 //  Buffer.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 9/13/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -10,10 +10,10 @@ import Foundation
 
 class BufferTimeCount<Element> : Producer<[Element]> {
     
-    private let _timeSpan: RxTimeInterval
-    private let _count: Int
-    private let _scheduler: SchedulerType
-    private let _source: Observable<Element>
+    fileprivate let _timeSpan: RxTimeInterval
+    fileprivate let _count: Int
+    fileprivate let _scheduler: SchedulerType
+    fileprivate let _source: Observable<Element>
     
     init(source: Observable<Element>, timeSpan: RxTimeInterval, count: Int, scheduler: SchedulerType) {
         _source = source
@@ -22,18 +22,18 @@ class BufferTimeCount<Element> : Producer<[Element]> {
         _scheduler = scheduler
     }
     
-    override func run<O : ObserverType where O.E == [Element]>(observer: O) -> Disposable {
-        let sink = BufferTimeCountSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == [Element] {
+        let sink = BufferTimeCountSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
-class BufferTimeCountSink<Element, O: ObserverType where O.E == [Element]>
+class BufferTimeCountSink<Element, O: ObserverType>
     : Sink<O>
     , LockOwnerType
     , ObserverType
-    , SynchronizedOnType {
+    , SynchronizedOnType where O.E == [Element] {
     typealias Parent = BufferTimeCount<Element>
     typealias E = Element
     
@@ -46,14 +46,14 @@ class BufferTimeCountSink<Element, O: ObserverType where O.E == [Element]>
     private var _buffer = [Element]()
     private var _windowID = 0
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
  
     func run() -> Disposable {
         createTimer(_windowID)
-        return StableCompositeDisposable.create(_timerD, _parent._source.subscribe(self))
+        return Disposables.create(_timerD, _parent._source.subscribe(self))
     }
     
     func startNewWindowAndSendCurrentOne() {
@@ -62,37 +62,37 @@ class BufferTimeCountSink<Element, O: ObserverType where O.E == [Element]>
         
         let buffer = _buffer
         _buffer = []
-        forwardOn(.Next(buffer))
+        forwardOn(.next(buffer))
         
         createTimer(windowID)
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         switch event {
-        case .Next(let element):
+        case .next(let element):
             _buffer.append(element)
             
             if _buffer.count == _parent._count {
                 startNewWindowAndSendCurrentOne()
             }
             
-        case .Error(let error):
+        case .error(let error):
             _buffer = []
-            forwardOn(.Error(error))
+            forwardOn(.error(error))
             dispose()
-        case .Completed:
-            forwardOn(.Next(_buffer))
-            forwardOn(.Completed)
+        case .completed:
+            forwardOn(.next(_buffer))
+            forwardOn(.completed)
             dispose()
         }
     }
     
-    func createTimer(windowID: Int) {
-        if _timerD.disposed {
+    func createTimer(_ windowID: Int) {
+        if _timerD.isDisposed {
             return
         }
         
@@ -104,7 +104,7 @@ class BufferTimeCountSink<Element, O: ObserverType where O.E == [Element]>
         
         _timerD.disposable = nextTimer
 
-        nextTimer.disposable = _parent._scheduler.scheduleRelative(windowID, dueTime: _parent._timeSpan) { previousWindowID in
+        let disposable = _parent._scheduler.scheduleRelative(windowID, dueTime: _parent._timeSpan) { previousWindowID in
             self._lock.performLocked {
                 if previousWindowID != self._windowID {
                     return
@@ -113,7 +113,9 @@ class BufferTimeCountSink<Element, O: ObserverType where O.E == [Element]>
                 self.startNewWindowAndSendCurrentOne()
             }
             
-            return NopDisposable.instance
+            return Disposables.create()
         }
+
+        nextTimer.setDisposable(disposable)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Catch.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Catch.swift
index 72cb33b..0f43069 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Catch.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Catch.swift
@@ -20,13 +20,13 @@ class CatchSinkProxy<O: ObserverType> : ObserverType {
         _parent = parent
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         _parent.forwardOn(event)
         
         switch event {
-        case .Next:
+        case .next:
             break
-        case .Error, .Completed:
+        case .error, .completed:
             _parent.dispose()
         }
     }
@@ -39,27 +39,27 @@ class CatchSink<O: ObserverType> : Sink<O>, ObserverType {
     private let _parent: Parent
     private let _subscription = SerialDisposable()
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
         let d1 = SingleAssignmentDisposable()
         _subscription.disposable = d1
-        d1.disposable = _parent._source.subscribe(self)
+        d1.setDisposable(_parent._source.subscribe(self))
 
         return _subscription
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         switch event {
-        case .Next:
+        case .next:
             forwardOn(event)
-        case .Completed:
+        case .completed:
             forwardOn(event)
             dispose()
-        case .Error(let error):
+        case .error(let error):
             do {
                 let catchSequence = try _parent._handler(error)
 
@@ -68,7 +68,7 @@ class CatchSink<O: ObserverType> : Sink<O>, ObserverType {
                 _subscription.disposable = catchSequence.subscribe(observer)
             }
             catch let e {
-                forwardOn(.Error(e))
+                forwardOn(.error(e))
                 dispose()
             }
         }
@@ -76,68 +76,68 @@ class CatchSink<O: ObserverType> : Sink<O>, ObserverType {
 }
 
 class Catch<Element> : Producer<Element> {
-    typealias Handler = (ErrorType) throws -> Observable<Element>
+    typealias Handler = (Swift.Error) throws -> Observable<Element>
     
-    private let _source: Observable<Element>
-    private let _handler: Handler
+    fileprivate let _source: Observable<Element>
+    fileprivate let _handler: Handler
     
-    init(source: Observable<Element>, handler: Handler) {
+    init(source: Observable<Element>, handler: @escaping Handler) {
         _source = source
         _handler = handler
     }
     
-    override func run<O: ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = CatchSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = CatchSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
 // catch enumerable
 
-class CatchSequenceSink<S: SequenceType, O: ObserverType where S.Generator.Element : ObservableConvertibleType, S.Generator.Element.E == O.E>
+class CatchSequenceSink<S: Sequence, O: ObserverType>
     : TailRecursiveSink<S, O>
-    , ObserverType {
+    , ObserverType where S.Iterator.Element : ObservableConvertibleType, S.Iterator.Element.E == O.E {
     typealias Element = O.E
     typealias Parent = CatchSequence<S>
     
-    private var _lastError: ErrorType?
+    private var _lastError: Swift.Error?
     
-    override init(observer: O) {
-        super.init(observer: observer)
+    override init(observer: O, cancel: Cancelable) {
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         switch event {
-        case .Next:
+        case .next:
             forwardOn(event)
-        case .Error(let error):
+        case .error(let error):
             _lastError = error
-            schedule(.MoveNext)
-        case .Completed:
+            schedule(.moveNext)
+        case .completed:
             forwardOn(event)
             dispose()
         }
     }
 
-    override func subscribeToNext(source: Observable<E>) -> Disposable {
+    override func subscribeToNext(_ source: Observable<E>) -> Disposable {
         return source.subscribe(self)
     }
     
     override func done() {
         if let lastError = _lastError {
-            forwardOn(.Error(lastError))
+            forwardOn(.error(lastError))
         }
         else {
-            forwardOn(.Completed)
+            forwardOn(.completed)
         }
         
         self.dispose()
     }
     
-    override func extract(observable: Observable<Element>) -> SequenceGenerator? {
+    override func extract(_ observable: Observable<Element>) -> SequenceGenerator? {
         if let onError = observable as? CatchSequence<S> {
-            return (onError.sources.generate(), nil)
+            return (onError.sources.makeIterator(), nil)
         }
         else {
             return nil
@@ -145,8 +145,8 @@ class CatchSequenceSink<S: SequenceType, O: ObserverType where S.Generator.Eleme
     }
 }
 
-class CatchSequence<S: SequenceType where S.Generator.Element : ObservableConvertibleType> : Producer<S.Generator.Element.E> {
-    typealias Element = S.Generator.Element.E
+class CatchSequence<S: Sequence> : Producer<S.Iterator.Element.E> where S.Iterator.Element : ObservableConvertibleType {
+    typealias Element = S.Iterator.Element.E
     
     let sources: S
     
@@ -154,9 +154,9 @@ class CatchSequence<S: SequenceType where S.Generator.Element : ObservableConver
         self.sources = sources
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = CatchSequenceSink<S, O>(observer: observer)
-        sink.disposable = sink.run((self.sources.generate(), nil))
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = CatchSequenceSink<S, O>(observer: observer, cancel: cancel)
+        let subscription = sink.run((self.sources.makeIterator(), nil))
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/CombineLatest+CollectionType.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/CombineLatest+Collection.swift
similarity index 59%
rename from Example/Pods/RxSwift/RxSwift/Observables/Implementations/CombineLatest+CollectionType.swift
rename to Example/Pods/RxSwift/RxSwift/Observables/Implementations/CombineLatest+Collection.swift
index c1dba6b..713a653 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/CombineLatest+CollectionType.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/CombineLatest+Collection.swift
@@ -1,6 +1,6 @@
 //
-//  CombineLatest+CollectionType.swift
-//  Rx
+//  CombineLatest+Collection.swift
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 8/29/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,10 +8,10 @@
 
 import Foundation
 
-class CombineLatestCollectionTypeSink<C: CollectionType, R, O: ObserverType where C.Generator.Element : ObservableConvertibleType, O.E == R>
-    : Sink<O> {
+class CombineLatestCollectionTypeSink<C: Collection, R, O: ObserverType>
+    : Sink<O> where C.Iterator.Element : ObservableConvertibleType, O.E == R {
     typealias Parent = CombineLatestCollectionType<C, R>
-    typealias SourceElement = C.Generator.Element.E
+    typealias SourceElement = C.Iterator.Element.E
     
     let _parent: Parent
     
@@ -24,10 +24,10 @@ class CombineLatestCollectionTypeSink<C: CollectionType, R, O: ObserverType wher
     var _numberOfDone = 0
     var _subscriptions: [SingleAssignmentDisposable]
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        _values = [SourceElement?](count: parent._count, repeatedValue: nil)
-        _isDone = [Bool](count: parent._count, repeatedValue: false)
+        _values = [SourceElement?](repeating: nil, count: parent._count)
+        _isDone = [Bool](repeating: false, count: parent._count)
         _subscriptions = Array<SingleAssignmentDisposable>()
         _subscriptions.reserveCapacity(parent._count)
         
@@ -35,13 +35,13 @@ class CombineLatestCollectionTypeSink<C: CollectionType, R, O: ObserverType wher
             _subscriptions.append(SingleAssignmentDisposable())
         }
         
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<SourceElement>, atIndex: Int) {
+    func on(_ event: Event<SourceElement>, atIndex: Int) {
         _lock.lock(); defer { _lock.unlock() } // {
             switch event {
-            case .Next(let element):
+            case .next(let element):
                 if _values[atIndex] == nil {
                    _numberOfValues += 1
                 }
@@ -51,7 +51,7 @@ class CombineLatestCollectionTypeSink<C: CollectionType, R, O: ObserverType wher
                 if _numberOfValues < _parent._count {
                     let numberOfOthersThatAreDone = self._numberOfDone - (_isDone[atIndex] ? 1 : 0)
                     if numberOfOthersThatAreDone == self._parent._count - 1 {
-                        forwardOn(.Completed)
+                        forwardOn(.completed)
                         dispose()
                     }
                     return
@@ -59,17 +59,17 @@ class CombineLatestCollectionTypeSink<C: CollectionType, R, O: ObserverType wher
                 
                 do {
                     let result = try _parent._resultSelector(_values.map { $0! })
-                    forwardOn(.Next(result))
+                    forwardOn(.next(result))
                 }
                 catch let error {
-                    forwardOn(.Error(error))
+                    forwardOn(.error(error))
                     dispose()
                 }
                 
-            case .Error(let error):
-                forwardOn(.Error(error))
+            case .error(let error):
+                forwardOn(.error(error))
                 dispose()
-            case .Completed:
+            case .completed:
                 if _isDone[atIndex] {
                     return
                 }
@@ -78,7 +78,7 @@ class CombineLatestCollectionTypeSink<C: CollectionType, R, O: ObserverType wher
                 _numberOfDone += 1
                 
                 if _numberOfDone == self._parent._count {
-                    forwardOn(.Completed)
+                    forwardOn(.completed)
                     dispose()
                 }
                 else {
@@ -90,36 +90,38 @@ class CombineLatestCollectionTypeSink<C: CollectionType, R, O: ObserverType wher
     
     func run() -> Disposable {
         var j = 0
-        for i in _parent._sources.startIndex ..< _parent._sources.endIndex {
+        for i in _parent._sources {
             let index = j
-            let source = _parent._sources[i].asObservable()
-            _subscriptions[j].disposable = source.subscribe(AnyObserver { event in
+            let source = i.asObservable()
+            let disposable = source.subscribe(AnyObserver { event in
                 self.on(event, atIndex: index)
             })
+
+            _subscriptions[j].setDisposable(disposable)
             
             j += 1
         }
         
-        return CompositeDisposable(disposables: _subscriptions.map { $0 })
+        return Disposables.create(_subscriptions)
     }
 }
 
-class CombineLatestCollectionType<C: CollectionType, R where C.Generator.Element : ObservableConvertibleType> : Producer<R> {
-    typealias ResultSelector = [C.Generator.Element.E] throws -> R
+class CombineLatestCollectionType<C: Collection, R> : Producer<R> where C.Iterator.Element : ObservableConvertibleType {
+    typealias ResultSelector = ([C.Iterator.Element.E]) throws -> R
     
     let _sources: C
     let _resultSelector: ResultSelector
     let _count: Int
 
-    init(sources: C, resultSelector: ResultSelector) {
+    init(sources: C, resultSelector: @escaping ResultSelector) {
         _sources = sources
         _resultSelector = resultSelector
         _count = Int(self._sources.count.toIntMax())
     }
     
-    override func run<O : ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = CombineLatestCollectionTypeSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = CombineLatestCollectionTypeSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/CombineLatest+arity.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/CombineLatest+arity.swift
index 8f7b608..2969b45 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/CombineLatest+arity.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/CombineLatest+arity.swift
@@ -22,9 +22,8 @@ extension Observable {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func combineLatest<O1: ObservableType, O2: ObservableType>
-        (source1: O1, _ source2: O2, resultSelector: (O1.E, O2.E) throws -> E)
+        (_ source1: O1, _ source2: O2, resultSelector: @escaping (O1.E, O2.E) throws -> E)
             -> Observable<E> {
         return CombineLatest2(
             source1: source1.asObservable(), source2: source2.asObservable(),
@@ -42,9 +41,9 @@ class CombineLatestSink2_<E1, E2, O: ObserverType> : CombineLatestSink<O> {
     var _latestElement1: E1! = nil
     var _latestElement2: E2! = nil
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(arity: 2, observer: observer)
+        super.init(arity: 2, observer: observer, cancel: cancel)
     }
 
     func run() -> Disposable {
@@ -54,10 +53,10 @@ class CombineLatestSink2_<E1, E2, O: ObserverType> : CombineLatestSink<O> {
         let observer1 = CombineLatestObserver(lock: _lock, parent: self, index: 0, setLatestValue: { (e: E1) -> Void in self._latestElement1 = e }, this: subscription1)
         let observer2 = CombineLatestObserver(lock: _lock, parent: self, index: 1, setLatestValue: { (e: E2) -> Void in self._latestElement2 = e }, this: subscription2)
 
-         subscription1.disposable = _parent._source1.subscribe(observer1)
-         subscription2.disposable = _parent._source2.subscribe(observer2)
+         subscription1.setDisposable(_parent._source1.subscribe(observer1))
+         subscription2.setDisposable(_parent._source2.subscribe(observer2))
 
-        return CompositeDisposable(disposables: [
+        return Disposables.create([
                 subscription1,
                 subscription2
         ])
@@ -76,17 +75,17 @@ class CombineLatest2<E1, E2, R> : Producer<R> {
 
     let _resultSelector: ResultSelector
 
-    init(source1: Observable<E1>, source2: Observable<E2>, resultSelector: ResultSelector) {
+    init(source1: Observable<E1>, source2: Observable<E2>, resultSelector: @escaping ResultSelector) {
         _source1 = source1
         _source2 = source2
 
         _resultSelector = resultSelector
     }
 
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = CombineLatestSink2_(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = CombineLatestSink2_(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -103,9 +102,8 @@ extension Observable {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func combineLatest<O1: ObservableType, O2: ObservableType, O3: ObservableType>
-        (source1: O1, _ source2: O2, _ source3: O3, resultSelector: (O1.E, O2.E, O3.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, resultSelector: @escaping (O1.E, O2.E, O3.E) throws -> E)
             -> Observable<E> {
         return CombineLatest3(
             source1: source1.asObservable(), source2: source2.asObservable(), source3: source3.asObservable(),
@@ -124,9 +122,9 @@ class CombineLatestSink3_<E1, E2, E3, O: ObserverType> : CombineLatestSink<O> {
     var _latestElement2: E2! = nil
     var _latestElement3: E3! = nil
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(arity: 3, observer: observer)
+        super.init(arity: 3, observer: observer, cancel: cancel)
     }
 
     func run() -> Disposable {
@@ -138,11 +136,11 @@ class CombineLatestSink3_<E1, E2, E3, O: ObserverType> : CombineLatestSink<O> {
         let observer2 = CombineLatestObserver(lock: _lock, parent: self, index: 1, setLatestValue: { (e: E2) -> Void in self._latestElement2 = e }, this: subscription2)
         let observer3 = CombineLatestObserver(lock: _lock, parent: self, index: 2, setLatestValue: { (e: E3) -> Void in self._latestElement3 = e }, this: subscription3)
 
-         subscription1.disposable = _parent._source1.subscribe(observer1)
-         subscription2.disposable = _parent._source2.subscribe(observer2)
-         subscription3.disposable = _parent._source3.subscribe(observer3)
+         subscription1.setDisposable(_parent._source1.subscribe(observer1))
+         subscription2.setDisposable(_parent._source2.subscribe(observer2))
+         subscription3.setDisposable(_parent._source3.subscribe(observer3))
 
-        return CompositeDisposable(disposables: [
+        return Disposables.create([
                 subscription1,
                 subscription2,
                 subscription3
@@ -163,7 +161,7 @@ class CombineLatest3<E1, E2, E3, R> : Producer<R> {
 
     let _resultSelector: ResultSelector
 
-    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, resultSelector: ResultSelector) {
+    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, resultSelector: @escaping ResultSelector) {
         _source1 = source1
         _source2 = source2
         _source3 = source3
@@ -171,10 +169,10 @@ class CombineLatest3<E1, E2, E3, R> : Producer<R> {
         _resultSelector = resultSelector
     }
 
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = CombineLatestSink3_(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = CombineLatestSink3_(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -191,9 +189,8 @@ extension Observable {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func combineLatest<O1: ObservableType, O2: ObservableType, O3: ObservableType, O4: ObservableType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, resultSelector: (O1.E, O2.E, O3.E, O4.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E) throws -> E)
             -> Observable<E> {
         return CombineLatest4(
             source1: source1.asObservable(), source2: source2.asObservable(), source3: source3.asObservable(), source4: source4.asObservable(),
@@ -213,9 +210,9 @@ class CombineLatestSink4_<E1, E2, E3, E4, O: ObserverType> : CombineLatestSink<O
     var _latestElement3: E3! = nil
     var _latestElement4: E4! = nil
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(arity: 4, observer: observer)
+        super.init(arity: 4, observer: observer, cancel: cancel)
     }
 
     func run() -> Disposable {
@@ -229,12 +226,12 @@ class CombineLatestSink4_<E1, E2, E3, E4, O: ObserverType> : CombineLatestSink<O
         let observer3 = CombineLatestObserver(lock: _lock, parent: self, index: 2, setLatestValue: { (e: E3) -> Void in self._latestElement3 = e }, this: subscription3)
         let observer4 = CombineLatestObserver(lock: _lock, parent: self, index: 3, setLatestValue: { (e: E4) -> Void in self._latestElement4 = e }, this: subscription4)
 
-         subscription1.disposable = _parent._source1.subscribe(observer1)
-         subscription2.disposable = _parent._source2.subscribe(observer2)
-         subscription3.disposable = _parent._source3.subscribe(observer3)
-         subscription4.disposable = _parent._source4.subscribe(observer4)
+         subscription1.setDisposable(_parent._source1.subscribe(observer1))
+         subscription2.setDisposable(_parent._source2.subscribe(observer2))
+         subscription3.setDisposable(_parent._source3.subscribe(observer3))
+         subscription4.setDisposable(_parent._source4.subscribe(observer4))
 
-        return CompositeDisposable(disposables: [
+        return Disposables.create([
                 subscription1,
                 subscription2,
                 subscription3,
@@ -257,7 +254,7 @@ class CombineLatest4<E1, E2, E3, E4, R> : Producer<R> {
 
     let _resultSelector: ResultSelector
 
-    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, resultSelector: ResultSelector) {
+    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, resultSelector: @escaping ResultSelector) {
         _source1 = source1
         _source2 = source2
         _source3 = source3
@@ -266,10 +263,10 @@ class CombineLatest4<E1, E2, E3, E4, R> : Producer<R> {
         _resultSelector = resultSelector
     }
 
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = CombineLatestSink4_(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = CombineLatestSink4_(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -286,9 +283,8 @@ extension Observable {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func combineLatest<O1: ObservableType, O2: ObservableType, O3: ObservableType, O4: ObservableType, O5: ObservableType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E) throws -> E)
             -> Observable<E> {
         return CombineLatest5(
             source1: source1.asObservable(), source2: source2.asObservable(), source3: source3.asObservable(), source4: source4.asObservable(), source5: source5.asObservable(),
@@ -309,9 +305,9 @@ class CombineLatestSink5_<E1, E2, E3, E4, E5, O: ObserverType> : CombineLatestSi
     var _latestElement4: E4! = nil
     var _latestElement5: E5! = nil
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(arity: 5, observer: observer)
+        super.init(arity: 5, observer: observer, cancel: cancel)
     }
 
     func run() -> Disposable {
@@ -327,13 +323,13 @@ class CombineLatestSink5_<E1, E2, E3, E4, E5, O: ObserverType> : CombineLatestSi
         let observer4 = CombineLatestObserver(lock: _lock, parent: self, index: 3, setLatestValue: { (e: E4) -> Void in self._latestElement4 = e }, this: subscription4)
         let observer5 = CombineLatestObserver(lock: _lock, parent: self, index: 4, setLatestValue: { (e: E5) -> Void in self._latestElement5 = e }, this: subscription5)
 
-         subscription1.disposable = _parent._source1.subscribe(observer1)
-         subscription2.disposable = _parent._source2.subscribe(observer2)
-         subscription3.disposable = _parent._source3.subscribe(observer3)
-         subscription4.disposable = _parent._source4.subscribe(observer4)
-         subscription5.disposable = _parent._source5.subscribe(observer5)
+         subscription1.setDisposable(_parent._source1.subscribe(observer1))
+         subscription2.setDisposable(_parent._source2.subscribe(observer2))
+         subscription3.setDisposable(_parent._source3.subscribe(observer3))
+         subscription4.setDisposable(_parent._source4.subscribe(observer4))
+         subscription5.setDisposable(_parent._source5.subscribe(observer5))
 
-        return CompositeDisposable(disposables: [
+        return Disposables.create([
                 subscription1,
                 subscription2,
                 subscription3,
@@ -358,7 +354,7 @@ class CombineLatest5<E1, E2, E3, E4, E5, R> : Producer<R> {
 
     let _resultSelector: ResultSelector
 
-    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, resultSelector: ResultSelector) {
+    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, resultSelector: @escaping ResultSelector) {
         _source1 = source1
         _source2 = source2
         _source3 = source3
@@ -368,10 +364,10 @@ class CombineLatest5<E1, E2, E3, E4, E5, R> : Producer<R> {
         _resultSelector = resultSelector
     }
 
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = CombineLatestSink5_(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = CombineLatestSink5_(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -388,9 +384,8 @@ extension Observable {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func combineLatest<O1: ObservableType, O2: ObservableType, O3: ObservableType, O4: ObservableType, O5: ObservableType, O6: ObservableType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E) throws -> E)
             -> Observable<E> {
         return CombineLatest6(
             source1: source1.asObservable(), source2: source2.asObservable(), source3: source3.asObservable(), source4: source4.asObservable(), source5: source5.asObservable(), source6: source6.asObservable(),
@@ -412,9 +407,9 @@ class CombineLatestSink6_<E1, E2, E3, E4, E5, E6, O: ObserverType> : CombineLate
     var _latestElement5: E5! = nil
     var _latestElement6: E6! = nil
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(arity: 6, observer: observer)
+        super.init(arity: 6, observer: observer, cancel: cancel)
     }
 
     func run() -> Disposable {
@@ -432,14 +427,14 @@ class CombineLatestSink6_<E1, E2, E3, E4, E5, E6, O: ObserverType> : CombineLate
         let observer5 = CombineLatestObserver(lock: _lock, parent: self, index: 4, setLatestValue: { (e: E5) -> Void in self._latestElement5 = e }, this: subscription5)
         let observer6 = CombineLatestObserver(lock: _lock, parent: self, index: 5, setLatestValue: { (e: E6) -> Void in self._latestElement6 = e }, this: subscription6)
 
-         subscription1.disposable = _parent._source1.subscribe(observer1)
-         subscription2.disposable = _parent._source2.subscribe(observer2)
-         subscription3.disposable = _parent._source3.subscribe(observer3)
-         subscription4.disposable = _parent._source4.subscribe(observer4)
-         subscription5.disposable = _parent._source5.subscribe(observer5)
-         subscription6.disposable = _parent._source6.subscribe(observer6)
+         subscription1.setDisposable(_parent._source1.subscribe(observer1))
+         subscription2.setDisposable(_parent._source2.subscribe(observer2))
+         subscription3.setDisposable(_parent._source3.subscribe(observer3))
+         subscription4.setDisposable(_parent._source4.subscribe(observer4))
+         subscription5.setDisposable(_parent._source5.subscribe(observer5))
+         subscription6.setDisposable(_parent._source6.subscribe(observer6))
 
-        return CompositeDisposable(disposables: [
+        return Disposables.create([
                 subscription1,
                 subscription2,
                 subscription3,
@@ -466,7 +461,7 @@ class CombineLatest6<E1, E2, E3, E4, E5, E6, R> : Producer<R> {
 
     let _resultSelector: ResultSelector
 
-    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, source6: Observable<E6>, resultSelector: ResultSelector) {
+    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, source6: Observable<E6>, resultSelector: @escaping ResultSelector) {
         _source1 = source1
         _source2 = source2
         _source3 = source3
@@ -477,10 +472,10 @@ class CombineLatest6<E1, E2, E3, E4, E5, E6, R> : Producer<R> {
         _resultSelector = resultSelector
     }
 
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = CombineLatestSink6_(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = CombineLatestSink6_(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -497,9 +492,8 @@ extension Observable {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func combineLatest<O1: ObservableType, O2: ObservableType, O3: ObservableType, O4: ObservableType, O5: ObservableType, O6: ObservableType, O7: ObservableType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E) throws -> E)
             -> Observable<E> {
         return CombineLatest7(
             source1: source1.asObservable(), source2: source2.asObservable(), source3: source3.asObservable(), source4: source4.asObservable(), source5: source5.asObservable(), source6: source6.asObservable(), source7: source7.asObservable(),
@@ -522,9 +516,9 @@ class CombineLatestSink7_<E1, E2, E3, E4, E5, E6, E7, O: ObserverType> : Combine
     var _latestElement6: E6! = nil
     var _latestElement7: E7! = nil
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(arity: 7, observer: observer)
+        super.init(arity: 7, observer: observer, cancel: cancel)
     }
 
     func run() -> Disposable {
@@ -544,15 +538,15 @@ class CombineLatestSink7_<E1, E2, E3, E4, E5, E6, E7, O: ObserverType> : Combine
         let observer6 = CombineLatestObserver(lock: _lock, parent: self, index: 5, setLatestValue: { (e: E6) -> Void in self._latestElement6 = e }, this: subscription6)
         let observer7 = CombineLatestObserver(lock: _lock, parent: self, index: 6, setLatestValue: { (e: E7) -> Void in self._latestElement7 = e }, this: subscription7)
 
-         subscription1.disposable = _parent._source1.subscribe(observer1)
-         subscription2.disposable = _parent._source2.subscribe(observer2)
-         subscription3.disposable = _parent._source3.subscribe(observer3)
-         subscription4.disposable = _parent._source4.subscribe(observer4)
-         subscription5.disposable = _parent._source5.subscribe(observer5)
-         subscription6.disposable = _parent._source6.subscribe(observer6)
-         subscription7.disposable = _parent._source7.subscribe(observer7)
+         subscription1.setDisposable(_parent._source1.subscribe(observer1))
+         subscription2.setDisposable(_parent._source2.subscribe(observer2))
+         subscription3.setDisposable(_parent._source3.subscribe(observer3))
+         subscription4.setDisposable(_parent._source4.subscribe(observer4))
+         subscription5.setDisposable(_parent._source5.subscribe(observer5))
+         subscription6.setDisposable(_parent._source6.subscribe(observer6))
+         subscription7.setDisposable(_parent._source7.subscribe(observer7))
 
-        return CompositeDisposable(disposables: [
+        return Disposables.create([
                 subscription1,
                 subscription2,
                 subscription3,
@@ -581,7 +575,7 @@ class CombineLatest7<E1, E2, E3, E4, E5, E6, E7, R> : Producer<R> {
 
     let _resultSelector: ResultSelector
 
-    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, source6: Observable<E6>, source7: Observable<E7>, resultSelector: ResultSelector) {
+    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, source6: Observable<E6>, source7: Observable<E7>, resultSelector: @escaping ResultSelector) {
         _source1 = source1
         _source2 = source2
         _source3 = source3
@@ -593,10 +587,10 @@ class CombineLatest7<E1, E2, E3, E4, E5, E6, E7, R> : Producer<R> {
         _resultSelector = resultSelector
     }
 
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = CombineLatestSink7_(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = CombineLatestSink7_(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -613,9 +607,8 @@ extension Observable {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func combineLatest<O1: ObservableType, O2: ObservableType, O3: ObservableType, O4: ObservableType, O5: ObservableType, O6: ObservableType, O7: ObservableType, O8: ObservableType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, _ source8: O8, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E, O8.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, _ source8: O8, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E, O8.E) throws -> E)
             -> Observable<E> {
         return CombineLatest8(
             source1: source1.asObservable(), source2: source2.asObservable(), source3: source3.asObservable(), source4: source4.asObservable(), source5: source5.asObservable(), source6: source6.asObservable(), source7: source7.asObservable(), source8: source8.asObservable(),
@@ -639,9 +632,9 @@ class CombineLatestSink8_<E1, E2, E3, E4, E5, E6, E7, E8, O: ObserverType> : Com
     var _latestElement7: E7! = nil
     var _latestElement8: E8! = nil
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(arity: 8, observer: observer)
+        super.init(arity: 8, observer: observer, cancel: cancel)
     }
 
     func run() -> Disposable {
@@ -663,16 +656,16 @@ class CombineLatestSink8_<E1, E2, E3, E4, E5, E6, E7, E8, O: ObserverType> : Com
         let observer7 = CombineLatestObserver(lock: _lock, parent: self, index: 6, setLatestValue: { (e: E7) -> Void in self._latestElement7 = e }, this: subscription7)
         let observer8 = CombineLatestObserver(lock: _lock, parent: self, index: 7, setLatestValue: { (e: E8) -> Void in self._latestElement8 = e }, this: subscription8)
 
-         subscription1.disposable = _parent._source1.subscribe(observer1)
-         subscription2.disposable = _parent._source2.subscribe(observer2)
-         subscription3.disposable = _parent._source3.subscribe(observer3)
-         subscription4.disposable = _parent._source4.subscribe(observer4)
-         subscription5.disposable = _parent._source5.subscribe(observer5)
-         subscription6.disposable = _parent._source6.subscribe(observer6)
-         subscription7.disposable = _parent._source7.subscribe(observer7)
-         subscription8.disposable = _parent._source8.subscribe(observer8)
+         subscription1.setDisposable(_parent._source1.subscribe(observer1))
+         subscription2.setDisposable(_parent._source2.subscribe(observer2))
+         subscription3.setDisposable(_parent._source3.subscribe(observer3))
+         subscription4.setDisposable(_parent._source4.subscribe(observer4))
+         subscription5.setDisposable(_parent._source5.subscribe(observer5))
+         subscription6.setDisposable(_parent._source6.subscribe(observer6))
+         subscription7.setDisposable(_parent._source7.subscribe(observer7))
+         subscription8.setDisposable(_parent._source8.subscribe(observer8))
 
-        return CompositeDisposable(disposables: [
+        return Disposables.create([
                 subscription1,
                 subscription2,
                 subscription3,
@@ -703,7 +696,7 @@ class CombineLatest8<E1, E2, E3, E4, E5, E6, E7, E8, R> : Producer<R> {
 
     let _resultSelector: ResultSelector
 
-    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, source6: Observable<E6>, source7: Observable<E7>, source8: Observable<E8>, resultSelector: ResultSelector) {
+    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, source6: Observable<E6>, source7: Observable<E7>, source8: Observable<E8>, resultSelector: @escaping ResultSelector) {
         _source1 = source1
         _source2 = source2
         _source3 = source3
@@ -716,10 +709,10 @@ class CombineLatest8<E1, E2, E3, E4, E5, E6, E7, E8, R> : Producer<R> {
         _resultSelector = resultSelector
     }
 
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = CombineLatestSink8_(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = CombineLatestSink8_(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/CombineLatest.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/CombineLatest.swift
index f493fde..be5cc2e 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/CombineLatest.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/CombineLatest.swift
@@ -1,6 +1,6 @@
 //
 //  CombineLatest.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/21/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,9 +9,9 @@
 import Foundation
 
 protocol CombineLatestProtocol : class {
-    func next(index: Int)
-    func fail(error: ErrorType)
-    func done(index: Int)
+    func next(_ index: Int)
+    func fail(_ error: Swift.Error)
+    func done(_ index: Int)
 }
 
 class CombineLatestSink<O: ObserverType>
@@ -27,19 +27,19 @@ class CombineLatestSink<O: ObserverType>
     private var _hasValue: [Bool]
     private var _isDone: [Bool]
    
-    init(arity: Int, observer: O) {
+    init(arity: Int, observer: O, cancel: Cancelable) {
         _arity = arity
-        _hasValue = [Bool](count: arity, repeatedValue: false)
-        _isDone = [Bool](count: arity, repeatedValue: false)
+        _hasValue = [Bool](repeating: false, count: arity)
+        _isDone = [Bool](repeating: false, count: arity)
         
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func getResult() throws -> Element {
         abstractMethod()
     }
     
-    func next(index: Int) {
+    func next(_ index: Int) {
         if !_hasValue[index] {
             _hasValue[index] = true
             _numberOfValues += 1
@@ -48,10 +48,10 @@ class CombineLatestSink<O: ObserverType>
         if _numberOfValues == _arity {
             do {
                 let result = try getResult()
-                forwardOn(.Next(result))
+                forwardOn(.next(result))
             }
             catch let e {
-                forwardOn(.Error(e))
+                forwardOn(.error(e))
                 dispose()
             }
         }
@@ -66,18 +66,18 @@ class CombineLatestSink<O: ObserverType>
             }
             
             if allOthersDone {
-                forwardOn(.Completed)
+                forwardOn(.completed)
                 dispose()
             }
         }
     }
     
-    func fail(error: ErrorType) {
-        forwardOn(.Error(error))
+    func fail(_ error: Swift.Error) {
+        forwardOn(.error(error))
         dispose()
     }
     
-    func done(index: Int) {
+    func done(_ index: Int) {
         if _isDone[index] {
             return
         }
@@ -86,7 +86,7 @@ class CombineLatestSink<O: ObserverType>
         _numberOfDone += 1
 
         if _numberOfDone == _arity {
-            forwardOn(.Completed)
+            forwardOn(.completed)
             dispose()
         }
     }
@@ -106,7 +106,7 @@ class CombineLatestObserver<ElementType>
     private let _this: Disposable
     private let _setLatestValue: ValueSetter
     
-    init(lock: NSRecursiveLock, parent: CombineLatestProtocol, index: Int, setLatestValue: ValueSetter, this: Disposable) {
+    init(lock: NSRecursiveLock, parent: CombineLatestProtocol, index: Int, setLatestValue: @escaping ValueSetter, this: Disposable) {
         _lock = lock
         _parent = parent
         _index = index
@@ -114,21 +114,21 @@ class CombineLatestObserver<ElementType>
         _setLatestValue = setLatestValue
     }
     
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<Element>) {
+    func _synchronized_on(_ event: Event<Element>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             _setLatestValue(value)
             _parent.next(_index)
-        case .Error(let error):
+        case .error(let error):
             _this.dispose()
             _parent.fail(error)
-        case .Completed:
+        case .completed:
             _this.dispose()
             _parent.done(_index)
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Concat.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Concat.swift
index 05352b9..51ac494 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Concat.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Concat.swift
@@ -1,6 +1,6 @@
 //
 //  Concat.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/21/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,34 +9,34 @@
 import Foundation
 
 
-class ConcatSink<S: SequenceType, O: ObserverType where S.Generator.Element : ObservableConvertibleType, S.Generator.Element.E == O.E>
+class ConcatSink<S: Sequence, O: ObserverType>
     : TailRecursiveSink<S, O>
-    , ObserverType {
+    , ObserverType where S.Iterator.Element : ObservableConvertibleType, S.Iterator.Element.E == O.E {
     typealias Element = O.E
     
-    override init(observer: O) {
-        super.init(observer: observer)
+    override init(observer: O, cancel: Cancelable) {
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<Element>){
+    func on(_ event: Event<Element>){
         switch event {
-        case .Next:
+        case .next:
             forwardOn(event)
-        case .Error:
+        case .error:
             forwardOn(event)
             dispose()
-        case .Completed:
-            schedule(.MoveNext)
+        case .completed:
+            schedule(.moveNext)
         }
     }
 
-    override func subscribeToNext(source: Observable<E>) -> Disposable {
+    override func subscribeToNext(_ source: Observable<E>) -> Disposable {
         return source.subscribe(self)
     }
     
-    override func extract(observable: Observable<E>) -> SequenceGenerator? {
+    override func extract(_ observable: Observable<E>) -> SequenceGenerator? {
         if let source = observable as? Concat<S> {
-            return (source._sources.generate(), source._count)
+            return (source._sources.makeIterator(), source._count)
         }
         else {
             return nil
@@ -44,20 +44,20 @@ class ConcatSink<S: SequenceType, O: ObserverType where S.Generator.Element : Ob
     }
 }
 
-class Concat<S: SequenceType where S.Generator.Element : ObservableConvertibleType> : Producer<S.Generator.Element.E> {
-    typealias Element = S.Generator.Element.E
+class Concat<S: Sequence> : Producer<S.Iterator.Element.E> where S.Iterator.Element : ObservableConvertibleType {
+    typealias Element = S.Iterator.Element.E
     
-    private let _sources: S
-    private let _count: IntMax?
+    fileprivate let _sources: S
+    fileprivate let _count: IntMax?
 
     init(sources: S, count: IntMax?) {
         _sources = sources
         _count = count
     }
     
-    override func run<O: ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = ConcatSink<S, O>(observer: observer)
-        sink.disposable = sink.run((_sources.generate(), _count))
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = ConcatSink<S, O>(observer: observer, cancel: cancel)
+        let subscription = sink.run((_sources.makeIterator(), _count))
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ConnectableObservable.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ConnectableObservable.swift
index ce78bab..12eb555 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ConnectableObservable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ConnectableObservable.swift
@@ -1,6 +1,6 @@
 //
 //  ConnectableObservable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/1/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -63,13 +63,13 @@ class ConnectableObservableAdapter<S: SubjectType>
     : ConnectableObservable<S.E> {
     typealias ConnectionType = Connection<S>
     
-    private let _subject: S
-    private let _source: Observable<S.SubjectObserverType.E>
+    fileprivate let _subject: S
+    fileprivate let _source: Observable<S.SubjectObserverType.E>
     
-    private let _lock = NSRecursiveLock()
+    fileprivate let _lock = NSRecursiveLock()
     
     // state
-    private var _connection: ConnectionType?
+    fileprivate var _connection: ConnectionType?
     
     init(source: Observable<S.SubjectObserverType.E>, subject: S) {
         _source = source
@@ -90,7 +90,7 @@ class ConnectableObservableAdapter<S: SubjectType>
         }
     }
     
-    override func subscribe<O : ObserverType where O.E == S.E>(observer: O) -> Disposable {
+    override func subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == S.E {
         return _subject.subscribe(observer)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Debug.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Debug.swift
index b74b9a1..76f8ecd 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Debug.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Debug.swift
@@ -10,56 +10,64 @@ import Foundation
 
 let dateFormat = "yyyy-MM-dd HH:mm:ss.SSS"
 
-func logEvent(identifier: String, dateFormat: NSDateFormatter, content: String) {
-    print("\(dateFormat.stringFromDate(NSDate())): \(identifier) -> \(content)")
+func logEvent(_ identifier: String, dateFormat: DateFormatter, content: String) {
+    print("\(dateFormat.string(from: Date())): \(identifier) -> \(content)")
 }
 
-class Debug_<O: ObserverType> : Sink<O>, ObserverType {
+class DebugSink<Source: ObservableType, O: ObserverType> : Sink<O>, ObserverType where O.E == Source.E {
     typealias Element = O.E
-    typealias Parent = Debug<Element>
+    typealias Parent = Debug<Source>
     
     private let _parent: Parent
-    private let _timestampFormatter = NSDateFormatter()
+    private let _timestampFormatter = DateFormatter()
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
         _timestampFormatter.dateFormat = dateFormat
 
         logEvent(_parent._identifier, dateFormat: _timestampFormatter, content: "subscribed")
 
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         let maxEventTextLength = 40
         let eventText = "\(event)"
-        let eventNormalized = eventText.characters.count > maxEventTextLength
+
+        let eventNormalized = (eventText.characters.count > maxEventTextLength) && _parent._trimOutput
             ? String(eventText.characters.prefix(maxEventTextLength / 2)) + "..." + String(eventText.characters.suffix(maxEventTextLength / 2))
             : eventText
 
         logEvent(_parent._identifier, dateFormat: _timestampFormatter, content: "Event \(eventNormalized)")
+
         forwardOn(event)
+        if event.isStopEvent {
+            dispose()
+        }
     }
     
     override func dispose() {
-        logEvent(_parent._identifier, dateFormat: _timestampFormatter, content: "disposed")
+        if !self.disposed {
+            logEvent(_parent._identifier, dateFormat: _timestampFormatter, content: "isDisposed")
+        }
         super.dispose()
     }
 }
 
-class Debug<Element> : Producer<Element> {
-    private let _identifier: String
-    
-    private let _source: Observable<Element>
+class Debug<Source: ObservableType> : Producer<Source.E> {
+    fileprivate let _identifier: String
+    fileprivate let _trimOutput: Bool
+    fileprivate let _source: Source
 
-    init(source: Observable<Element>, identifier: String?, file: String, line: UInt, function: String) {
+    init(source: Source, identifier: String?, trimOutput: Bool, file: String, line: UInt, function: String) {
+        _trimOutput = trimOutput
         if let identifier = identifier {
             _identifier = identifier
         }
         else {
             let trimmedFile: String
             if let lastIndex = file.lastIndexOf("/") {
-                trimmedFile = file[lastIndex.successor() ..< file.endIndex]
+                trimmedFile = file[file.index(after: lastIndex) ..< file.endIndex]
             }
             else {
                 trimmedFile = file
@@ -69,9 +77,9 @@ class Debug<Element> : Producer<Element> {
         _source = source
     }
     
-    override func run<O: ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = Debug_(parent: self, observer: observer)
-        sink.disposable = _source.subscribe(sink)
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Source.E {
+        let sink = DebugSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = _source.subscribe(sink)
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Debunce.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Debunce.swift
new file mode 100644
index 0000000..99e8013
--- /dev/null
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Debunce.swift
@@ -0,0 +1,104 @@
+//
+//  Debunce.swift
+//  RxSwift
+//
+//  Created by Krunoslav Zaher on 9/11/16.
+//  Copyright © 2016 Krunoslav Zaher. All rights reserved.
+//
+
+import Foundation
+
+class DebounceSink<O: ObserverType>
+    : Sink<O>
+    , ObserverType
+    , LockOwnerType
+    , SynchronizedOnType {
+    typealias Element = O.E
+    typealias ParentType = Debounce<Element>
+
+    private let _parent: ParentType
+
+    let _lock = NSRecursiveLock()
+
+    // state
+    private var _id = 0 as UInt64
+    private var _value: Element? = nil
+
+    let cancellable = SerialDisposable()
+
+    init(parent: ParentType, observer: O, cancel: Cancelable) {
+        _parent = parent
+
+        super.init(observer: observer, cancel: cancel)
+    }
+
+    func run() -> Disposable {
+        let subscription = _parent._source.subscribe(self)
+
+        return Disposables.create(subscription, cancellable)
+    }
+
+    func on(_ event: Event<Element>) {
+        synchronizedOn(event)
+    }
+
+    func _synchronized_on(_ event: Event<Element>) {
+        switch event {
+        case .next(let element):
+            _id = _id &+ 1
+            let currentId = _id
+            _value = element
+
+
+            let scheduler = _parent._scheduler
+            let dueTime = _parent._dueTime
+
+            let d = SingleAssignmentDisposable()
+            self.cancellable.disposable = d
+            d.setDisposable(scheduler.scheduleRelative(currentId, dueTime: dueTime, action: self.propagate))
+        case .error:
+            _value = nil
+            forwardOn(event)
+            dispose()
+        case .completed:
+            if let value = _value {
+                _value = nil
+                forwardOn(.next(value))
+            }
+            forwardOn(.completed)
+            dispose()
+        }
+    }
+
+    func propagate(_ currentId: UInt64) -> Disposable {
+        _lock.lock(); defer { _lock.unlock() } // {
+        let originalValue = _value
+
+        if let value = originalValue, _id == currentId {
+            _value = nil
+            forwardOn(.next(value))
+        }
+        // }
+        return Disposables.create()
+    }
+}
+
+class Debounce<Element> : Producer<Element> {
+
+    fileprivate let _source: Observable<Element>
+    fileprivate let _dueTime: RxTimeInterval
+    fileprivate let _scheduler: SchedulerType
+
+    init(source: Observable<Element>, dueTime: RxTimeInterval, scheduler: SchedulerType) {
+        _source = source
+        _dueTime = dueTime
+        _scheduler = scheduler
+    }
+
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = DebounceSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
+    }
+    
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Deferred.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Deferred.swift
index 31c6f2b..43182ce 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Deferred.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Deferred.swift
@@ -8,14 +8,14 @@
 
 import Foundation
 
-class DeferredSink<S: ObservableType, O: ObserverType where S.E == O.E> : Sink<O>, ObserverType {
+class DeferredSink<S: ObservableType, O: ObserverType> : Sink<O>, ObserverType where S.E == O.E {
     typealias E = O.E
 
     private let _observableFactory: () throws -> S
 
-    init(observableFactory: () throws -> S, observer: O) {
+    init(observableFactory: @escaping () throws -> S, observer: O, cancel: Cancelable) {
         _observableFactory = observableFactory
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
@@ -24,21 +24,21 @@ class DeferredSink<S: ObservableType, O: ObserverType where S.E == O.E> : Sink<O
             return result.subscribe(self)
         }
         catch let e {
-            forwardOn(.Error(e))
+            forwardOn(.error(e))
             dispose()
-            return NopDisposable.instance
+            return Disposables.create()
         }
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         forwardOn(event)
         
         switch event {
-        case .Next:
+        case .next:
             break
-        case .Error:
+        case .error:
             dispose()
-        case .Completed:
+        case .completed:
             dispose()
         }
     }
@@ -49,13 +49,13 @@ class Deferred<S: ObservableType> : Producer<S.E> {
     
     private let _observableFactory : Factory
     
-    init(observableFactory: Factory) {
+    init(observableFactory: @escaping Factory) {
         _observableFactory = observableFactory
     }
     
-    override func run<O: ObserverType where O.E == S.E>(observer: O) -> Disposable {
-        let sink = DeferredSink(observableFactory: _observableFactory, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == S.E {
+        let sink = DeferredSink(observableFactory: _observableFactory, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Delay.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Delay.swift
new file mode 100644
index 0000000..1697692
--- /dev/null
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Delay.swift
@@ -0,0 +1,164 @@
+//
+//  Delay.swift
+//  RxSwift
+//
+//  Created by tarunon on 2016/02/09.
+//  Copyright © 2016 Krunoslav Zaher. All rights reserved.
+//
+
+import Foundation
+
+class DelaySink<ElementType, O: ObserverType>
+    : Sink<O>
+    , ObserverType where O.E == ElementType {
+    typealias E = O.E
+    typealias Source = Observable<E>
+    typealias DisposeKey = Bag<Disposable>.KeyType
+    
+    private let _lock = NSRecursiveLock()
+
+    private let _dueTime: RxTimeInterval
+    private let _scheduler: SchedulerType
+    
+    private let _sourceSubscription = SingleAssignmentDisposable()
+    private let _cancelable = SerialDisposable()
+
+    // is scheduled some action
+    private var _active = false
+    // is "run loop" on different scheduler running
+    private var _running = false
+    private var _errorEvent: Event<E>? = nil
+
+    // state
+    private var _queue = Queue<(eventTime: RxTime, event: Event<E>)>(capacity: 0)
+    private var _disposed = false
+    
+    init(observer: O, dueTime: RxTimeInterval, scheduler: SchedulerType, cancel: Cancelable) {
+        _dueTime = dueTime
+        _scheduler = scheduler
+        super.init(observer: observer, cancel: cancel)
+    }
+
+    // All of these complications in this method are caused by the fact that 
+    // error should be propagated immediatelly. Error can bepotentially received on different
+    // scheduler so this process needs to be synchronized somehow.
+    //
+    // Another complication is that scheduler is potentially concurrent so internal queue is used.
+    func drainQueue(state: (), scheduler: AnyRecursiveScheduler<()>) {
+
+        _lock.lock()    // {
+            let hasFailed = _errorEvent != nil
+            if !hasFailed {
+                _running = true
+            }
+        _lock.unlock()  // }
+
+        if hasFailed {
+            return
+        }
+
+        var ranAtLeastOnce = false
+
+        while true {
+            _lock.lock() // {
+                let errorEvent = _errorEvent
+
+                let eventToForwardImmediatelly = ranAtLeastOnce ? nil : _queue.dequeue()?.event
+                let nextEventToScheduleOriginalTime: Date? = ranAtLeastOnce && !_queue.isEmpty ? _queue.peek().eventTime : nil
+
+                if let _ = errorEvent {
+                }
+                else  {
+                    if let _ = eventToForwardImmediatelly {
+                    }
+                    else if let _ = nextEventToScheduleOriginalTime {
+                        _running = false
+                    }
+                    else {
+                        _running = false
+                        _active = false
+                    }
+                }
+            _lock.unlock() // {
+
+            if let errorEvent = errorEvent {
+                self.forwardOn(errorEvent)
+                self.dispose()
+                return
+            }
+            else {
+                if let eventToForwardImmediatelly = eventToForwardImmediatelly {
+                    ranAtLeastOnce = true
+                    self.forwardOn(eventToForwardImmediatelly)
+                    if case .completed = eventToForwardImmediatelly {
+                        self.dispose()
+                        return
+                    }
+                }
+                else if let nextEventToScheduleOriginalTime = nextEventToScheduleOriginalTime {
+                    let elapsedTime = _scheduler.now.timeIntervalSince(nextEventToScheduleOriginalTime)
+                    let interval = _dueTime - elapsedTime
+                    let normalizedInterval = interval < 0.0 ? 0.0 : interval
+                    scheduler.schedule((), dueTime: normalizedInterval)
+                    return
+                }
+                else {
+                    return
+                }
+            }
+        }
+    }
+    
+    func on(_ event: Event<E>) {
+        if event.isStopEvent {
+            _sourceSubscription.dispose()
+        }
+
+        switch event {
+        case .error(_):
+            _lock.lock()    // {
+                let shouldSendImmediatelly = !_running
+                _queue = Queue(capacity: 0)
+                _errorEvent = event
+            _lock.unlock()  // }
+
+            if shouldSendImmediatelly {
+                forwardOn(event)
+                dispose()
+            }
+        default:
+            _lock.lock()    // {
+                let shouldSchedule = !_active
+                _active = true
+                _queue.enqueue((_scheduler.now, event))
+            _lock.unlock()  // }
+
+            if shouldSchedule {
+                _cancelable.disposable = _scheduler.scheduleRecursive((), dueTime: _dueTime, action: self.drainQueue)
+            }
+        }
+    }
+    
+    func run(source: Source) -> Disposable {
+        _sourceSubscription.setDisposable(source.subscribeSafe(self))
+        return Disposables.create(_sourceSubscription, _cancelable)
+    }
+}
+
+class Delay<Element>: Producer<Element> {
+    private let _source: Observable<Element>
+    private let _dueTime: RxTimeInterval
+    private let _scheduler: SchedulerType
+    
+    init(source: Observable<Element>, dueTime: RxTimeInterval, scheduler: SchedulerType) {
+        _source = source
+        _dueTime = dueTime
+        _scheduler = scheduler
+    }
+
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = DelaySink(observer: observer, dueTime: _dueTime, scheduler: _scheduler, cancel: cancel)
+        let subscription = sink.run(source: _source)
+        return (sink: sink, subscription: subscription)
+    }
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/DelaySubscription.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/DelaySubscription.swift
index 3dc62ac..d7abf20 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/DelaySubscription.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/DelaySubscription.swift
@@ -8,20 +8,20 @@
 
 import Foundation
 
-class DelaySubscriptionSink<ElementType, O: ObserverType where O.E == ElementType>
+class DelaySubscriptionSink<ElementType, O: ObserverType>
     : Sink<O>
-    , ObserverType {
+    , ObserverType where O.E == ElementType {
     typealias Parent = DelaySubscription<ElementType>
     typealias E = O.E
     
     private let _parent: Parent
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         forwardOn(event)
         if event.isStopEvent {
             dispose()
@@ -41,12 +41,12 @@ class DelaySubscription<Element>: Producer<Element> {
         _scheduler = scheduler
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = DelaySubscriptionSink(parent: self, observer: observer)
-        sink.disposable = _scheduler.scheduleRelative((), dueTime: _dueTime) { _ in
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = DelaySubscriptionSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = _scheduler.scheduleRelative((), dueTime: _dueTime) { _ in
             return self._source.subscribe(sink)
         }
 
-        return sink
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/DistinctUntilChanged.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/DistinctUntilChanged.swift
index 9f03da4..a54f6cf 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/DistinctUntilChanged.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/DistinctUntilChanged.swift
@@ -1,6 +1,6 @@
 //
 //  DistinctUntilChanged.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/15/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -14,14 +14,14 @@ class DistinctUntilChangedSink<O: ObserverType, Key>: Sink<O>, ObserverType {
     private let _parent: DistinctUntilChanged<E, Key>
     private var _currentKey: Key? = nil
     
-    init(parent: DistinctUntilChanged<E, Key>, observer: O) {
+    init(parent: DistinctUntilChanged<E, Key>, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             do {
                 let key = try _parent._selector(value)
                 var areEqual = false
@@ -38,10 +38,10 @@ class DistinctUntilChangedSink<O: ObserverType, Key>: Sink<O>, ObserverType {
                 forwardOn(event)
             }
             catch let error {
-                forwardOn(.Error(error))
+                forwardOn(.error(error))
                 dispose()
             }
-        case .Error, .Completed:
+        case .error, .completed:
             forwardOn(event)
             dispose()
         }
@@ -52,19 +52,19 @@ class DistinctUntilChanged<Element, Key>: Producer<Element> {
     typealias KeySelector = (Element) throws -> Key
     typealias EqualityComparer = (Key, Key) throws -> Bool
     
-    private let _source: Observable<Element>
-    private let _selector: KeySelector
-    private let _comparer: EqualityComparer
+    fileprivate let _source: Observable<Element>
+    fileprivate let _selector: KeySelector
+    fileprivate let _comparer: EqualityComparer
     
-    init(source: Observable<Element>, selector: KeySelector, comparer: EqualityComparer) {
+    init(source: Observable<Element>, selector: @escaping KeySelector, comparer: @escaping EqualityComparer) {
         _source = source
         _selector = selector
         _comparer = comparer
     }
     
-    override func run<O: ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = DistinctUntilChangedSink(parent: self, observer: observer)
-        sink.disposable = _source.subscribe(sink)
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = DistinctUntilChangedSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = _source.subscribe(sink)
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Do.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Do.swift
index 719f2bb..0e766dd 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Do.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Do.swift
@@ -1,6 +1,6 @@
 //
 //  Do.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/21/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -14,12 +14,12 @@ class DoSink<O: ObserverType> : Sink<O>, ObserverType {
     
     private let _parent: Parent
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         do {
             try _parent._eventHandler(event)
             forwardOn(event)
@@ -28,26 +28,36 @@ class DoSink<O: ObserverType> : Sink<O>, ObserverType {
             }
         }
         catch let error {
-            forwardOn(.Error(error))
+            forwardOn(.error(error))
             dispose()
         }
     }
 }
 
 class Do<Element> : Producer<Element> {
-    typealias EventHandler = Event<Element> throws -> Void
+    typealias EventHandler = (Event<Element>) throws -> Void
     
-    private let _source: Observable<Element>
-    private let _eventHandler: EventHandler
+    fileprivate let _source: Observable<Element>
+    fileprivate let _eventHandler: EventHandler
+    fileprivate let _onSubscribe: (() -> ())?
+    fileprivate let _onDispose: (() -> ())?
     
-    init(source: Observable<Element>, eventHandler: EventHandler) {
+    init(source: Observable<Element>, eventHandler: @escaping EventHandler, onSubscribe: (() -> ())?, onDispose: (() -> ())?) {
         _source = source
         _eventHandler = eventHandler
+        _onSubscribe = onSubscribe
+        _onDispose = onDispose
     }
     
-    override func run<O: ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = DoSink(parent: self, observer: observer)
-        sink.disposable = _source.subscribe(sink)
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        _onSubscribe?()
+        let sink = DoSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = _source.subscribe(sink)
+        let onDispose = _onDispose
+        let allSubscriptions = Disposables.create {
+            subscription.dispose()
+            onDispose?()
+        }
+        return (sink: sink, subscription: allSubscriptions)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ElementAt.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ElementAt.swift
index 4360afb..62b5587 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ElementAt.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ElementAt.swift
@@ -1,6 +1,6 @@
 //
 //  ElementAt.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Junior B. on 21/10/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,45 +9,45 @@
 import Foundation
 
 
-class ElementAtSink<SourceType, O: ObserverType where O.E == SourceType> : Sink<O>, ObserverType {
+class ElementAtSink<SourceType, O: ObserverType> : Sink<O>, ObserverType where O.E == SourceType {
     typealias Parent = ElementAt<SourceType>
     
     let _parent: Parent
     var _i: Int
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
         _i = parent._index
         
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<SourceType>) {
+    func on(_ event: Event<SourceType>) {
         switch event {
-        case .Next(_):
+        case .next(_):
 
             if (_i == 0) {
                 forwardOn(event)
-                forwardOn(.Completed)
+                forwardOn(.completed)
                 self.dispose()
             }
             
             do {
-                try decrementChecked(&_i)
+                let _ = try decrementChecked(&_i)
             } catch(let e) {
-                forwardOn(.Error(e))
+                forwardOn(.error(e))
                 dispose()
                 return
             }
             
-        case .Error(let e):
-            forwardOn(.Error(e))
+        case .error(let e):
+            forwardOn(.error(e))
             self.dispose()
-        case .Completed:
+        case .completed:
             if (_parent._throwOnEmpty) {
-                forwardOn(.Error(RxError.ArgumentOutOfRange))
+                forwardOn(.error(RxError.argumentOutOfRange))
             } else {
-                forwardOn(.Completed)
+                forwardOn(.completed)
             }
             
             self.dispose()
@@ -71,9 +71,9 @@ class ElementAt<SourceType> : Producer<SourceType> {
         self._throwOnEmpty = throwOnEmpty
     }
     
-    override func run<O: ObserverType where O.E == SourceType>(observer: O) -> Disposable {
-        let sink = ElementAtSink(parent: self, observer: observer)
-        sink.disposable = _source.subscribeSafe(sink)
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == SourceType {
+        let sink = ElementAtSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = _source.subscribeSafe(sink)
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Empty.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Empty.swift
index d2ebb18..39861a7 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Empty.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Empty.swift
@@ -1,6 +1,6 @@
 //
 //  Empty.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 8/30/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,8 +9,8 @@
 import Foundation
 
 class Empty<Element> : Producer<Element> {
-    override func subscribe<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        observer.on(.Completed)
-        return NopDisposable.instance
+    override func subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == Element {
+        observer.on(.completed)
+        return Disposables.create()
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Error.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Error.swift
index 79f19c9..6ddae8b 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Error.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Error.swift
@@ -1,6 +1,6 @@
 //
 //  Error.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 8/30/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,14 +9,14 @@
 import Foundation
 
 class Error<Element> : Producer<Element> {
-    private let _error: ErrorType
+    private let _error: Swift.Error
     
-    init(error: ErrorType) {
+    init(error: Swift.Error) {
         _error = error
     }
     
-    override func subscribe<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        observer.on(.Error(_error))
-        return NopDisposable.instance
+    override func subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == Element {
+        observer.on(.error(_error))
+        return Disposables.create()
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Filter.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Filter.swift
index b78fafb..2f03135 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Filter.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Filter.swift
@@ -1,6 +1,6 @@
 //
 //  Filter.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/17/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -12,29 +12,27 @@ class FilterSink<O : ObserverType>: Sink<O>, ObserverType {
     typealias Predicate = (Element) throws -> Bool
     typealias Element = O.E
     
-    typealias Parent = Filter<Element>
-    
     private let _predicate: Predicate
     
-    init(predicate: Predicate, observer: O) {
+    init(predicate: @escaping Predicate, observer: O, cancel: Cancelable) {
         _predicate = predicate
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         switch event {
-            case .Next(let value):
+            case .next(let value):
                 do {
                     let satisfies = try _predicate(value)
                     if satisfies {
-                        forwardOn(.Next(value))
+                        forwardOn(.next(value))
                     }
                 }
                 catch let e {
-                    forwardOn(.Error(e))
+                    forwardOn(.error(e))
                     dispose()
                 }
-            case .Completed, .Error:
+            case .completed, .error:
                 forwardOn(event)
                 dispose()
         }
@@ -47,14 +45,14 @@ class Filter<Element> : Producer<Element> {
     private let _source: Observable<Element>
     private let _predicate: Predicate
     
-    init(source: Observable<Element>, predicate: Predicate) {
+    init(source: Observable<Element>, predicate: @escaping Predicate) {
         _source = source
         _predicate = predicate
     }
     
-    override func run<O: ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = FilterSink(predicate: _predicate, observer: observer)
-        sink.disposable = _source.subscribe(sink)
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = FilterSink(predicate: _predicate, observer: observer, cancel: cancel)
+        let subscription = _source.subscribe(sink)
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Generate.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Generate.swift
index 8321f94..aebfb95 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Generate.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Generate.swift
@@ -1,6 +1,6 @@
 //
 //  Generate.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 9/2/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -15,10 +15,10 @@ class GenerateSink<S, O: ObserverType> : Sink<O> {
     
     private var _state: S
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
         _state = parent._initialState
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
@@ -30,17 +30,17 @@ class GenerateSink<S, O: ObserverType> : Sink<O> {
                 
                 if try self._parent._condition(self._state) {
                     let result = try self._parent._resultSelector(self._state)
-                    self.forwardOn(.Next(result))
+                    self.forwardOn(.next(result))
                     
                     recurse(false)
                 }
                 else {
-                    self.forwardOn(.Completed)
+                    self.forwardOn(.completed)
                     self.dispose()
                 }
             }
             catch let error {
-                self.forwardOn(.Error(error))
+                self.forwardOn(.error(error))
                 self.dispose()
             }
         }
@@ -48,13 +48,13 @@ class GenerateSink<S, O: ObserverType> : Sink<O> {
 }
 
 class Generate<S, E> : Producer<E> {
-    private let _initialState: S
-    private let _condition: S throws -> Bool
-    private let _iterate: S throws -> S
-    private let _resultSelector: S throws -> E
-    private let _scheduler: ImmediateSchedulerType
+    fileprivate let _initialState: S
+    fileprivate let _condition: (S) throws -> Bool
+    fileprivate let _iterate: (S) throws -> S
+    fileprivate let _resultSelector: (S) throws -> E
+    fileprivate let _scheduler: ImmediateSchedulerType
     
-    init(initialState: S, condition: S throws -> Bool, iterate: S throws -> S, resultSelector: S throws -> E, scheduler: ImmediateSchedulerType) {
+    init(initialState: S, condition: @escaping (S) throws -> Bool, iterate: @escaping (S) throws -> S, resultSelector: @escaping (S) throws -> E, scheduler: ImmediateSchedulerType) {
         _initialState = initialState
         _condition = condition
         _iterate = iterate
@@ -63,9 +63,9 @@ class Generate<S, E> : Producer<E> {
         super.init()
     }
     
-    override func run<O : ObserverType where O.E == E>(observer: O) -> Disposable {
-        let sink = GenerateSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == E {
+        let sink = GenerateSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Just.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Just.swift
index 280827a..08ef34c 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Just.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Just.swift
@@ -1,6 +1,6 @@
 //
 //  Just.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 8/30/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -13,36 +13,36 @@ class JustScheduledSink<O: ObserverType> : Sink<O> {
 
     private let _parent: Parent
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
 
     func run() -> Disposable {
         let scheduler = _parent._scheduler
         return scheduler.schedule(_parent._element) { element in
-            self.forwardOn(.Next(element))
+            self.forwardOn(.next(element))
             return scheduler.schedule(()) { _ in
-                self.forwardOn(.Completed)
-                return NopDisposable.instance
+                self.forwardOn(.completed)
+                return Disposables.create()
             }
         }
     }
 }
 
 class JustScheduled<Element> : Producer<Element> {
-    private let _scheduler: ImmediateSchedulerType
-    private let _element: Element
+    fileprivate let _scheduler: ImmediateSchedulerType
+    fileprivate let _element: Element
 
     init(element: Element, scheduler: ImmediateSchedulerType) {
         _scheduler = scheduler
         _element = element
     }
 
-    override func subscribe<O : ObserverType where O.E == E>(observer: O) -> Disposable {
-        let sink = JustScheduledSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == E {
+        let sink = JustScheduledSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -53,9 +53,9 @@ class Just<Element> : Producer<Element> {
         _element = element
     }
     
-    override func subscribe<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        observer.on(.Next(_element))
-        observer.on(.Completed)
-        return NopDisposable.instance
+    override func subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == Element {
+        observer.on(.next(_element))
+        observer.on(.completed)
+        return Disposables.create()
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Map.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Map.swift
index a4dc379..1a28fcb 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Map.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Map.swift
@@ -1,6 +1,6 @@
 //
 //  Map.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/15/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,34 +9,34 @@
 import Foundation
 
 class MapSink<SourceType, O : ObserverType> : Sink<O>, ObserverType {
-    typealias Selector = (SourceType) throws -> ResultType
+    typealias Transform = (SourceType) throws -> ResultType
 
     typealias ResultType = O.E
     typealias Element = SourceType
 
-    private let _selector: Selector
+    private let _transform: Transform
     
-    init(selector: Selector, observer: O) {
-        _selector = selector
-        super.init(observer: observer)
+    init(transform: @escaping Transform, observer: O, cancel: Cancelable) {
+        _transform = transform
+        super.init(observer: observer, cancel: cancel)
     }
 
-    func on(event: Event<SourceType>) {
+    func on(_ event: Event<SourceType>) {
         switch event {
-        case .Next(let element):
+        case .next(let element):
             do {
-                let mappedElement = try _selector(element)
-                forwardOn(.Next(mappedElement))
+                let mappedElement = try _transform(element)
+                forwardOn(.next(mappedElement))
             }
             catch let e {
-                forwardOn(.Error(e))
+                forwardOn(.error(e))
                 dispose()
             }
-        case .Error(let error):
-            forwardOn(.Error(error))
+        case .error(let error):
+            forwardOn(.error(error))
             dispose()
-        case .Completed:
-            forwardOn(.Completed)
+        case .completed:
+            forwardOn(.completed)
             dispose()
         }
     }
@@ -53,27 +53,27 @@ class MapWithIndexSink<SourceType, O : ObserverType> : Sink<O>, ObserverType {
 
     private var _index = 0
 
-    init(selector: Selector, observer: O) {
+    init(selector: @escaping Selector, observer: O, cancel: Cancelable) {
         _selector = selector
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
 
-    func on(event: Event<SourceType>) {
+    func on(_ event: Event<SourceType>) {
         switch event {
-        case .Next(let element):
+        case .next(let element):
             do {
                 let mappedElement = try _selector(element, try incrementChecked(&_index))
-                forwardOn(.Next(mappedElement))
+                forwardOn(.next(mappedElement))
             }
             catch let e {
-                forwardOn(.Error(e))
+                forwardOn(.error(e))
                 dispose()
             }
-        case .Error(let error):
-            forwardOn(.Error(error))
+        case .error(let error):
+            forwardOn(.error(error))
             dispose()
-        case .Completed:
-            forwardOn(.Completed)
+        case .completed:
+            forwardOn(.completed)
             dispose()
         }
     }
@@ -86,55 +86,60 @@ class MapWithIndex<SourceType, ResultType> : Producer<ResultType> {
 
     private let _selector: Selector
 
-    init(source: Observable<SourceType>, selector: Selector) {
+    init(source: Observable<SourceType>, selector: @escaping Selector) {
         _source = source
         _selector = selector
     }
 
-    override func run<O: ObserverType where O.E == ResultType>(observer: O) -> Disposable {
-        let sink = MapWithIndexSink(selector: _selector, observer: observer)
-        sink.disposable = _source.subscribe(sink)
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == ResultType {
+        let sink = MapWithIndexSink(selector: _selector, observer: observer, cancel: cancel)
+        let subscription = _source.subscribe(sink)
+        return (sink: sink, subscription: subscription)
     }
 }
 
 #if TRACE_RESOURCES
-public var numberOfMapOperators: Int32 = 0
+    var _numberOfMapOperators: AtomicInt = 0
+    extension Resources {
+        public static var numberOfMapOperators: Int32 {
+            return _numberOfMapOperators.valueSnapshot()
+        }
+    }
 #endif
 
 class Map<SourceType, ResultType>: Producer<ResultType> {
-    typealias Selector = (SourceType) throws -> ResultType
+    typealias Transform = (SourceType) throws -> ResultType
 
     private let _source: Observable<SourceType>
 
-    private let _selector: Selector
+    private let _transform: Transform
 
-    init(source: Observable<SourceType>, selector: Selector) {
+    init(source: Observable<SourceType>, transform: @escaping Transform) {
         _source = source
-        _selector = selector
+        _transform = transform
 
 #if TRACE_RESOURCES
-        AtomicIncrement(&numberOfMapOperators)
+        let _ = AtomicIncrement(&_numberOfMapOperators)
 #endif
     }
 
-    override func composeMap<R>(selector: ResultType throws -> R) -> Observable<R> {
-        let originalSelector = _selector
-        return Map<SourceType, R>(source: _source, selector: { (s: SourceType) throws -> R in
+    override func composeMap<R>(_ selector: @escaping (ResultType) throws -> R) -> Observable<R> {
+        let originalSelector = _transform
+        return Map<SourceType, R>(source: _source, transform: { (s: SourceType) throws -> R in
             let r: ResultType = try originalSelector(s)
             return try selector(r)
         })
     }
     
-    override func run<O: ObserverType where O.E == ResultType>(observer: O) -> Disposable {
-        let sink = MapSink(selector: _selector, observer: observer)
-        sink.disposable = _source.subscribe(sink)
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == ResultType {
+        let sink = MapSink(transform: _transform, observer: observer, cancel: cancel)
+        let subscription = _source.subscribe(sink)
+        return (sink: sink, subscription: subscription)
     }
 
     #if TRACE_RESOURCES
     deinit {
-        AtomicDecrement(&numberOfMapOperators)
+        let _ = AtomicDecrement(&_numberOfMapOperators)
     }
     #endif
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Merge.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Merge.swift
index a7b90bb..cd700ab 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Merge.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Merge.swift
@@ -1,6 +1,6 @@
 //
 //  Merge.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/28/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -10,12 +10,12 @@ import Foundation
 
 // MARK: Limited concurrency version
 
-class MergeLimitedSinkIter<S: ObservableConvertibleType, O: ObserverType where S.E == O.E>
+class MergeLimitedSinkIter<S: ObservableConvertibleType, O: ObserverType>
     : ObserverType
     , LockOwnerType
-    , SynchronizedOnType {
+    , SynchronizedOnType where S.E == O.E {
     typealias E = O.E
-    typealias DisposeKey = Bag<Disposable>.KeyType
+    typealias DisposeKey = CompositeDisposable.DisposeKey
     typealias Parent = MergeLimitedSink<S, O>
     
     private let _parent: Parent
@@ -30,19 +30,19 @@ class MergeLimitedSinkIter<S: ObservableConvertibleType, O: ObserverType where S
         _disposeKey = disposeKey
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         switch event {
-        case .Next:
+        case .next:
             _parent.forwardOn(event)
-        case .Error:
+        case .error:
             _parent.forwardOn(event)
             _parent.dispose()
-        case .Completed:
-            _parent._group.removeDisposable(_disposeKey)
+        case .completed:
+            _parent._group.remove(for: _disposeKey)
             if let next = _parent._queue.dequeue() {
                 _parent.subscribe(next, group: _parent._group)
             }
@@ -50,7 +50,7 @@ class MergeLimitedSinkIter<S: ObservableConvertibleType, O: ObserverType where S
                 _parent._activeCount = _parent._activeCount - 1
                 
                 if _parent._stopped && _parent._activeCount == 0 {
-                    _parent.forwardOn(.Completed)
+                    _parent.forwardOn(.completed)
                     _parent.dispose()
                 }
             }
@@ -58,61 +58,61 @@ class MergeLimitedSinkIter<S: ObservableConvertibleType, O: ObserverType where S
     }
 }
 
-class MergeLimitedSink<S: ObservableConvertibleType, O: ObserverType where S.E == O.E>
+class MergeLimitedSink<S: ObservableConvertibleType, O: ObserverType>
     : Sink<O>
     , ObserverType
     , LockOwnerType
-    , SynchronizedOnType {
+    , SynchronizedOnType where S.E == O.E {
     typealias E = S
     typealias QueueType = Queue<S>
 
-    private let _maxConcurrent: Int
+    fileprivate let _maxConcurrent: Int
 
     let _lock = NSRecursiveLock()
 
     // state
-    private var _stopped = false
-    private var _activeCount = 0
-    private var _queue = QueueType(capacity: 2)
+    fileprivate var _stopped = false
+    fileprivate var _activeCount = 0
+    fileprivate var _queue = QueueType(capacity: 2)
     
-    private let _sourceSubscription = SingleAssignmentDisposable()
-    private let _group = CompositeDisposable()
+    fileprivate let _sourceSubscription = SingleAssignmentDisposable()
+    fileprivate let _group = CompositeDisposable()
     
-    init(maxConcurrent: Int, observer: O) {
+    init(maxConcurrent: Int, observer: O, cancel: Cancelable) {
         _maxConcurrent = maxConcurrent
         
-        _group.addDisposable(_sourceSubscription)
-        super.init(observer: observer)
+        let _ = _group.insert(_sourceSubscription)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func run(source: Observable<S>) -> Disposable {
-        _group.addDisposable(_sourceSubscription)
+    func run(_ source: Observable<S>) -> Disposable {
+        let _ = _group.insert(_sourceSubscription)
         
         let disposable = source.subscribe(self)
-        _sourceSubscription.disposable = disposable
+        _sourceSubscription.setDisposable(disposable)
         return _group
     }
     
-    func subscribe(innerSource: E, group: CompositeDisposable) {
+    func subscribe(_ innerSource: E, group: CompositeDisposable) {
         let subscription = SingleAssignmentDisposable()
         
-        let key = group.addDisposable(subscription)
+        let key = group.insert(subscription)
         
         if let key = key {
             let observer = MergeLimitedSinkIter(parent: self, disposeKey: key)
             
             let disposable = innerSource.asObservable().subscribe(observer)
-            subscription.disposable = disposable
+            subscription.setDisposable(disposable)
         }
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             let subscribe: Bool
             if _activeCount < _maxConcurrent {
                 _activeCount += 1
@@ -126,12 +126,12 @@ class MergeLimitedSink<S: ObservableConvertibleType, O: ObserverType where S.E =
             if subscribe {
                 self.subscribe(value, group: _group)
             }
-        case .Error(let error):
-            forwardOn(.Error(error))
+        case .error(let error):
+            forwardOn(.error(error))
             dispose()
-        case .Completed:
+        case .completed:
             if _activeCount == 0 {
-                forwardOn(.Completed)
+                forwardOn(.completed)
                 dispose()
             }
             else {
@@ -152,61 +152,61 @@ class MergeLimited<S: ObservableConvertibleType> : Producer<S.E> {
         _maxConcurrent = maxConcurrent
     }
     
-    override func run<O: ObserverType where O.E == S.E>(observer: O) -> Disposable {
-        let sink = MergeLimitedSink<S, O>(maxConcurrent: _maxConcurrent, observer: observer)
-        sink.disposable = sink.run(_source)
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == S.E {
+        let sink = MergeLimitedSink<S, O>(maxConcurrent: _maxConcurrent, observer: observer, cancel: cancel)
+        let subscription = sink.run(_source)
+        return (sink: sink, subscription: subscription)
     }
 }
 
 // MARK: Merge
 
-final class MergeBasicSink<S: ObservableConvertibleType, O: ObserverType where O.E == S.E> : MergeSink<S, S, O> {
-    override init(observer: O) {
-        super.init(observer: observer)
+final class MergeBasicSink<S: ObservableConvertibleType, O: ObserverType> : MergeSink<S, S, O> where O.E == S.E {
+    override init(observer: O, cancel: Cancelable) {
+        super.init(observer: observer, cancel: cancel)
     }
 
-    override func performMap(element: S) throws -> S {
+    override func performMap(_ element: S) throws -> S {
         return element
     }
 }
 
 // MARK: flatMap
 
-final class FlatMapSink<SourceType, S: ObservableConvertibleType, O: ObserverType where O.E == S.E> : MergeSink<SourceType, S, O> {
+final class FlatMapSink<SourceType, S: ObservableConvertibleType, O: ObserverType> : MergeSink<SourceType, S, O> where O.E == S.E {
     typealias Selector = (SourceType) throws -> S
 
     private let _selector: Selector
 
-    init(selector: Selector, observer: O) {
+    init(selector: @escaping Selector, observer: O, cancel: Cancelable) {
         _selector = selector
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
 
-    override func performMap(element: SourceType) throws -> S {
+    override func performMap(_ element: SourceType) throws -> S {
         return try _selector(element)
     }
 }
 
-final class FlatMapWithIndexSink<SourceType, S: ObservableConvertibleType, O: ObserverType where O.E == S.E> : MergeSink<SourceType, S, O> {
+final class FlatMapWithIndexSink<SourceType, S: ObservableConvertibleType, O: ObserverType> : MergeSink<SourceType, S, O> where O.E == S.E {
     typealias Selector = (SourceType, Int) throws -> S
 
     private var _index = 0
     private let _selector: Selector
 
-    init(selector: Selector, observer: O) {
+    init(selector: @escaping Selector, observer: O, cancel: Cancelable) {
         _selector = selector
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
 
-    override func performMap(element: SourceType) throws -> S {
+    override func performMap(_ element: SourceType) throws -> S {
         return try _selector(element, try incrementChecked(&_index))
     }
 }
 
 // MARK: FlatMapFirst
 
-final class FlatMapFirstSink<SourceType, S: ObservableConvertibleType, O: ObserverType where O.E == S.E> : MergeSink<SourceType, S, O> {
+final class FlatMapFirstSink<SourceType, S: ObservableConvertibleType, O: ObserverType> : MergeSink<SourceType, S, O> where O.E == S.E {
     typealias Selector = (SourceType) throws -> S
 
     private let _selector: Selector
@@ -215,12 +215,12 @@ final class FlatMapFirstSink<SourceType, S: ObservableConvertibleType, O: Observ
         return _group.count == MergeNoIterators
     }
 
-    init(selector: Selector, observer: O) {
+    init(selector: @escaping Selector, observer: O, cancel: Cancelable) {
         _selector = selector
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
 
-    override func performMap(element: SourceType) throws -> S {
+    override func performMap(_ element: SourceType) throws -> S {
         return try _selector(element)
     }
 }
@@ -228,7 +228,7 @@ final class FlatMapFirstSink<SourceType, S: ObservableConvertibleType, O: Observ
 // It's value is one because initial source subscription is always in CompositeDisposable
 private let MergeNoIterators = 1
 
-class MergeSinkIter<SourceType, S: ObservableConvertibleType, O: ObserverType where O.E == S.E> : ObserverType {
+class MergeSinkIter<SourceType, S: ObservableConvertibleType, O: ObserverType> : ObserverType where O.E == S.E {
     typealias Parent = MergeSink<SourceType, S, O>
     typealias DisposeKey = CompositeDisposable.DisposeKey
     typealias E = O.E
@@ -241,19 +241,19 @@ class MergeSinkIter<SourceType, S: ObservableConvertibleType, O: ObserverType wh
         _disposeKey = disposeKey
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             _parent._lock.lock(); defer { _parent._lock.unlock() } // lock {
-                _parent.forwardOn(.Next(value))
+                _parent.forwardOn(.next(value))
             // }
-        case .Error(let error):
+        case .error(let error):
             _parent._lock.lock(); defer { _parent._lock.unlock() } // lock {
-                _parent.forwardOn(.Error(error))
+                _parent.forwardOn(.error(error))
                 _parent.dispose()
             // }
-        case .Completed:
-            _parent._group.removeDisposable(_disposeKey)
+        case .completed:
+            _parent._group.remove(for: _disposeKey)
             // If this has returned true that means that `Completed` should be sent.
             // In case there is a race who will sent first completed,
             // lock will sort it out. When first Completed message is sent
@@ -261,7 +261,7 @@ class MergeSinkIter<SourceType, S: ObservableConvertibleType, O: ObserverType wh
             // to be sent, and thus preserving the sequence grammar.
             if _parent._stopped && _parent._group.count == MergeNoIterators {
                 _parent._lock.lock(); defer { _parent._lock.unlock() } // lock {
-                    _parent.forwardOn(.Completed)
+                    _parent.forwardOn(.completed)
                     _parent.dispose()
                 // }
             }
@@ -270,35 +270,35 @@ class MergeSinkIter<SourceType, S: ObservableConvertibleType, O: ObserverType wh
 }
 
 
-class MergeSink<SourceType, S: ObservableConvertibleType, O: ObserverType where O.E == S.E>
+class MergeSink<SourceType, S: ObservableConvertibleType, O: ObserverType>
     : Sink<O>
-    , ObserverType {
+    , ObserverType where O.E == S.E {
     typealias ResultType = O.E
     typealias Element = SourceType
 
-    private let _lock = NSRecursiveLock()
+    fileprivate let _lock = NSRecursiveLock()
 
-    private var subscribeNext: Bool {
+    fileprivate var subscribeNext: Bool {
         return true
     }
 
     // state
-    private let _group = CompositeDisposable()
-    private let _sourceSubscription = SingleAssignmentDisposable()
+    fileprivate let _group = CompositeDisposable()
+    fileprivate let _sourceSubscription = SingleAssignmentDisposable()
 
-    private var _stopped = false
+    fileprivate var _stopped = false
 
-    override init(observer: O) {
-        super.init(observer: observer)
+    override init(observer: O, cancel: Cancelable) {
+        super.init(observer: observer, cancel: cancel)
     }
 
-    func performMap(element: SourceType) throws -> S {
+    func performMap(_ element: SourceType) throws -> S {
         abstractMethod()
     }
     
-    func on(event: Event<SourceType>) {
+    func on(_ event: Event<SourceType>) {
         switch event {
-        case .Next(let element):
+        case .next(let element):
             if !subscribeNext {
                 return
             }
@@ -307,19 +307,19 @@ class MergeSink<SourceType, S: ObservableConvertibleType, O: ObserverType where
                 subscribeInner(value.asObservable())
             }
             catch let e {
-                forwardOn(.Error(e))
+                forwardOn(.error(e))
                 dispose()
             }
-        case .Error(let error):
+        case .error(let error):
             _lock.lock(); defer { _lock.unlock() } // lock {
-                forwardOn(.Error(error))
+                forwardOn(.error(error))
                 dispose()
             // }
-        case .Completed:
+        case .completed:
             _lock.lock(); defer { _lock.unlock() } // lock {
                 _stopped = true
                 if _group.count == MergeNoIterators {
-                    forwardOn(.Completed)
+                    forwardOn(.completed)
                     dispose()
                 }
                 else {
@@ -329,20 +329,20 @@ class MergeSink<SourceType, S: ObservableConvertibleType, O: ObserverType where
         }
     }
     
-    func subscribeInner(source: Observable<O.E>) {
+    func subscribeInner(_ source: Observable<O.E>) {
         let iterDisposable = SingleAssignmentDisposable()
-        if let disposeKey = _group.addDisposable(iterDisposable) {
+        if let disposeKey = _group.insert(iterDisposable) {
             let iter = MergeSinkIter(parent: self, disposeKey: disposeKey)
             let subscription = source.subscribe(iter)
-            iterDisposable.disposable = subscription
+            iterDisposable.setDisposable(subscription)
         }
     }
     
-    func run(source: Observable<SourceType>) -> Disposable {
-        _group.addDisposable(_sourceSubscription)
+    func run(_ source: Observable<SourceType>) -> Disposable {
+        let _ = _group.insert(_sourceSubscription)
 
         let subscription = source.subscribe(self)
-        _sourceSubscription.disposable = subscription
+        _sourceSubscription.setDisposable(subscription)
         
         return _group
     }
@@ -357,15 +357,15 @@ final class FlatMap<SourceType, S: ObservableConvertibleType>: Producer<S.E> {
     
     private let _selector: Selector
 
-    init(source: Observable<SourceType>, selector: Selector) {
+    init(source: Observable<SourceType>, selector: @escaping Selector) {
         _source = source
         _selector = selector
     }
     
-    override func run<O: ObserverType where O.E == S.E>(observer: O) -> Disposable {
-        let sink = FlatMapSink(selector: _selector, observer: observer)
-        sink.disposable = sink.run(_source)
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == S.E {
+        let sink = FlatMapSink(selector: _selector, observer: observer, cancel: cancel)
+        let subscription = sink.run(_source)
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -376,15 +376,15 @@ final class FlatMapWithIndex<SourceType, S: ObservableConvertibleType>: Producer
     
     private let _selector: Selector
 
-    init(source: Observable<SourceType>, selector: Selector) {
+    init(source: Observable<SourceType>, selector: @escaping Selector) {
         _source = source
         _selector = selector
     }
     
-    override func run<O: ObserverType where O.E == S.E>(observer: O) -> Disposable {
-        let sink = FlatMapWithIndexSink<SourceType, S, O>(selector: _selector, observer: observer)
-        sink.disposable = sink.run(_source)
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == S.E {
+        let sink = FlatMapWithIndexSink<SourceType, S, O>(selector: _selector, observer: observer, cancel: cancel)
+        let subscription = sink.run(_source)
+        return (sink: sink, subscription: subscription)
     }
 
 }
@@ -396,15 +396,15 @@ final class FlatMapFirst<SourceType, S: ObservableConvertibleType>: Producer<S.E
 
     private let _selector: Selector
 
-    init(source: Observable<SourceType>, selector: Selector) {
+    init(source: Observable<SourceType>, selector: @escaping Selector) {
         _source = source
         _selector = selector
     }
 
-    override func run<O: ObserverType where O.E == S.E>(observer: O) -> Disposable {
-        let sink = FlatMapFirstSink<SourceType, S, O>(selector: _selector, observer: observer)
-        sink.disposable = sink.run(_source)
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == S.E {
+        let sink = FlatMapFirstSink<SourceType, S, O>(selector: _selector, observer: observer, cancel: cancel)
+        let subscription = sink.run(_source)
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -415,10 +415,10 @@ final class Merge<S: ObservableConvertibleType> : Producer<S.E> {
         _source = source
     }
     
-    override func run<O: ObserverType where O.E == S.E>(observer: O) -> Disposable {
-        let sink = MergeBasicSink<S, O>(observer: observer)
-        sink.disposable = sink.run(_source)
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == S.E {
+        let sink = MergeBasicSink<S, O>(observer: observer, cancel: cancel)
+        let subscription = sink.run(_source)
+        return (sink: sink, subscription: subscription)
     }
 }
 
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Multicast.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Multicast.swift
index fd8bfd6..fe4ec2d 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Multicast.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Multicast.swift
@@ -1,6 +1,6 @@
 //
 //  Multicast.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/27/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -15,9 +15,9 @@ class MulticastSink<S: SubjectType, O: ObserverType>: Sink<O>, ObserverType {
     
     private let _parent: MutlicastType
     
-    init(parent: MutlicastType, observer: O) {
+    init(parent: MutlicastType, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
@@ -30,20 +30,20 @@ class MulticastSink<S: SubjectType, O: ObserverType>: Sink<O>, ObserverType {
             let subscription = observable.subscribe(self)
             let connection = connectable.connect()
                 
-            return BinaryDisposable(subscription, connection)
+            return Disposables.create(subscription, connection)
         }
         catch let e {
-            forwardOn(.Error(e))
+            forwardOn(.error(e))
             dispose()
-            return NopDisposable.instance
+            return Disposables.create()
         }
     }
     
-    func on(event: Event<ResultType>) {
+    func on(_ event: Event<ResultType>) {
         forwardOn(event)
         switch event {
-            case .Next: break
-            case .Error, .Completed:
+            case .next: break
+            case .error, .completed:
                 dispose()
         }
     }
@@ -53,19 +53,19 @@ class Multicast<S: SubjectType, R>: Producer<R> {
     typealias SubjectSelectorType = () throws -> S
     typealias SelectorType = (Observable<S.E>) throws -> Observable<R>
     
-    private let _source: Observable<S.SubjectObserverType.E>
-    private let _subjectSelector: SubjectSelectorType
-    private let _selector: SelectorType
+    fileprivate let _source: Observable<S.SubjectObserverType.E>
+    fileprivate let _subjectSelector: SubjectSelectorType
+    fileprivate let _selector: SelectorType
     
-    init(source: Observable<S.SubjectObserverType.E>, subjectSelector: SubjectSelectorType, selector: SelectorType) {
+    init(source: Observable<S.SubjectObserverType.E>, subjectSelector: @escaping SubjectSelectorType, selector: @escaping SelectorType) {
         _source = source
         _subjectSelector = subjectSelector
         _selector = selector
     }
     
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = MulticastSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = MulticastSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Never.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Never.swift
index 1b20b27..2e1df69 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Never.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Never.swift
@@ -1,6 +1,6 @@
 //
 //  Never.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 8/30/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,7 +9,7 @@
 import Foundation
 
 class Never<Element> : Producer<Element> {
-    override func subscribe<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        return NopDisposable.instance
+    override func subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == Element {
+        return Disposables.create()
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ObserveOn.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ObserveOn.swift
index c0fb46d..9c561b1 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ObserveOn.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ObserveOn.swift
@@ -17,28 +17,28 @@ class ObserveOn<E> : Producer<E> {
         self.source = source
         
 #if TRACE_RESOURCES
-        AtomicIncrement(&resourceCount)
+        let _ = Resources.incrementTotal()
 #endif
     }
     
-    override func run<O : ObserverType where O.E == E>(observer: O) -> Disposable {
-        let sink = ObserveOnSink(scheduler: scheduler, observer: observer)
-        sink._subscription.disposable = source.subscribe(sink)
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == E {
+        let sink = ObserveOnSink(scheduler: scheduler, observer: observer, cancel: cancel)
+        let subscription = source.subscribe(sink)
+        return (sink: sink, subscription: subscription)
     }
     
 #if TRACE_RESOURCES
     deinit {
-        AtomicDecrement(&resourceCount)
+        let _ = Resources.decrementTotal()
     }
 #endif
 }
 
 enum ObserveOnState : Int32 {
     // pump is not running
-    case Stopped = 0
+    case stopped = 0
     // pump is running
-    case Running = 1
+    case running = 1
 }
 
 class ObserveOnSink<O: ObserverType> : ObserverBase<O.E> {
@@ -47,29 +47,30 @@ class ObserveOnSink<O: ObserverType> : ObserverBase<O.E> {
     let _scheduler: ImmediateSchedulerType
 
     var _lock = SpinLock()
+    let _observer: O
 
     // state
-    var _state = ObserveOnState.Stopped
-    var _observer: O?
+    var _state = ObserveOnState.stopped
     var _queue = Queue<Event<E>>(capacity: 10)
 
     let _scheduleDisposable = SerialDisposable()
-    let _subscription = SingleAssignmentDisposable()
+    let _cancel: Cancelable
 
-    init(scheduler: ImmediateSchedulerType, observer: O) {
+    init(scheduler: ImmediateSchedulerType, observer: O, cancel: Cancelable) {
         _scheduler = scheduler
         _observer = observer
+        _cancel = cancel
     }
 
-    override func onCore(event: Event<E>) {
+    override func onCore(_ event: Event<E>) {
         let shouldStart = _lock.calculateLocked { () -> Bool in
             self._queue.enqueue(event)
             
             switch self._state {
-            case .Stopped:
-                self._state = .Running
+            case .stopped:
+                self._state = .running
                 return true
-            case .Running:
+            case .running:
                 return false
             }
         }
@@ -79,19 +80,19 @@ class ObserveOnSink<O: ObserverType> : ObserverBase<O.E> {
         }
     }
     
-    func run(state: Void, recurse: Void -> Void) {
-        let (nextEvent, observer) = self._lock.calculateLocked { () -> (Event<E>?, O?) in
+    func run(_ state: Void, recurse: (Void) -> Void) {
+        let (nextEvent, observer) = self._lock.calculateLocked { () -> (Event<E>?, O) in
             if self._queue.count > 0 {
                 return (self._queue.dequeue(), self._observer)
             }
             else {
-                self._state = .Stopped
+                self._state = .stopped
                 return (nil, self._observer)
             }
         }
         
-        if let nextEvent = nextEvent {
-            observer?.on(nextEvent)
+        if let nextEvent = nextEvent, !_cancel.isDisposed {
+            observer.on(nextEvent)
             if nextEvent.isStopEvent {
                 dispose()
             }
@@ -113,7 +114,7 @@ class ObserveOnSink<O: ObserverType> : ObserverBase<O.E> {
                 return true
             }
             else {
-                self._state = .Stopped
+                self._state = .stopped
                 return false
             }
         // }
@@ -122,12 +123,7 @@ class ObserveOnSink<O: ObserverType> : ObserverBase<O.E> {
     override func dispose() {
         super.dispose()
 
-        _subscription.dispose()
+        _cancel.dispose()
         _scheduleDisposable.dispose()
-
-        _lock.lock(); defer { _lock.unlock() } // {
-            _observer = nil
-        
-        // }
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ObserveOnSerialDispatchQueue.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ObserveOnSerialDispatchQueue.swift
index f051f82..7f4ab9c 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ObserveOnSerialDispatchQueue.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ObserveOnSerialDispatchQueue.swift
@@ -9,25 +9,31 @@
 import Foundation
 
 #if TRACE_RESOURCES
-/**
-Counts number of `SerialDispatchQueueObservables`.
+    fileprivate var _numberOfSerialDispatchQueueObservables: AtomicInt = 0
+    extension Resources {
+        /**
+        Counts number of `SerialDispatchQueueObservables`.
 
-Purposed for unit tests.
-*/
-public var numberOfSerialDispatchQueueObservables: AtomicInt = 0
+        Purposed for unit tests.
+        */
+        public static var numberOfSerialDispatchQueueObservables: Int32 {
+            return _numberOfSerialDispatchQueueObservables.valueSnapshot()
+        }
+    }
 #endif
 
 class ObserveOnSerialDispatchQueueSink<O: ObserverType> : ObserverBase<O.E> {
     let scheduler: SerialDispatchQueueScheduler
     let observer: O
     
-    let subscription = SingleAssignmentDisposable()
+    let cancel: Cancelable
 
     var cachedScheduleLambda: ((ObserveOnSerialDispatchQueueSink<O>, Event<E>) -> Disposable)!
 
-    init(scheduler: SerialDispatchQueueScheduler, observer: O) {
+    init(scheduler: SerialDispatchQueueScheduler, observer: O, cancel: Cancelable) {
         self.scheduler = scheduler
         self.observer = observer
+        self.cancel = cancel
         super.init()
 
         cachedScheduleLambda = { sink, event in
@@ -37,18 +43,18 @@ class ObserveOnSerialDispatchQueueSink<O: ObserverType> : ObserverBase<O.E> {
                 sink.dispose()
             }
 
-            return NopDisposable.instance
+            return Disposables.create()
         }
     }
 
-    override func onCore(event: Event<E>) {
-        self.scheduler.schedule((self, event), action: cachedScheduleLambda)
+    override func onCore(_ event: Event<E>) {
+        let _ = self.scheduler.schedule((self, event), action: cachedScheduleLambda)
     }
    
     override func dispose() {
         super.dispose()
 
-        subscription.dispose()
+        cancel.dispose()
     }
 }
     
@@ -61,21 +67,21 @@ class ObserveOnSerialDispatchQueue<E> : Producer<E> {
         self.source = source
         
 #if TRACE_RESOURCES
-        AtomicIncrement(&resourceCount)
-        AtomicIncrement(&numberOfSerialDispatchQueueObservables)
+        let _ = Resources.incrementTotal()
+        let _ = AtomicIncrement(&_numberOfSerialDispatchQueueObservables)
 #endif
     }
     
-    override func run<O : ObserverType where O.E == E>(observer: O) -> Disposable {
-        let sink = ObserveOnSerialDispatchQueueSink(scheduler: scheduler, observer: observer)
-        sink.subscription.disposable = source.subscribe(sink)
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == E {
+        let sink = ObserveOnSerialDispatchQueueSink(scheduler: scheduler, observer: observer, cancel: cancel)
+        let subscription = source.subscribe(sink)
+        return (sink: sink, subscription: subscription)
     }
     
 #if TRACE_RESOURCES
     deinit {
-        AtomicDecrement(&resourceCount)
-        AtomicDecrement(&numberOfSerialDispatchQueueObservables)
+        let _ = Resources.decrementTotal()
+        let _ = AtomicDecrement(&_numberOfSerialDispatchQueueObservables)
     }
 #endif
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Producer.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Producer.swift
index 0a3048a..ca20f8a 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Producer.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Producer.swift
@@ -1,6 +1,6 @@
 //
 //  Producer.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/20/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -13,18 +13,107 @@ class Producer<Element> : Observable<Element> {
         super.init()
     }
     
-    override func subscribe<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
+    override func subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == Element {
         if !CurrentThreadScheduler.isScheduleRequired {
-            return run(observer)
+            // The returned disposable needs to release all references once it was disposed.
+            let disposer = SinkDisposer()
+            let sinkAndSubscription = run(observer, cancel: disposer)
+            disposer.setSinkAndSubscription(sink: sinkAndSubscription.sink, subscription: sinkAndSubscription.subscription)
+
+            return disposer
         }
         else {
             return CurrentThreadScheduler.instance.schedule(()) { _ in
-                return self.run(observer)
+                let disposer = SinkDisposer()
+                let sinkAndSubscription = self.run(observer, cancel: disposer)
+                disposer.setSinkAndSubscription(sink: sinkAndSubscription.sink, subscription: sinkAndSubscription.subscription)
+
+                return disposer
             }
         }
     }
     
-    func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
+    func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
         abstractMethod()
     }
-}
\ No newline at end of file
+}
+
+fileprivate class SinkDisposer: Cancelable {
+    #if os(Linux)
+    fileprivate let _lock = SpinLock()
+    #endif
+
+    fileprivate enum DisposeState: UInt32 {
+        case disposed = 1
+        case sinkAndSubscriptionSet = 2
+    }
+
+    // Jeej, swift API consistency rules
+    fileprivate enum DisposeStateInt32: Int32 {
+        case disposed = 1
+        case sinkAndSubscriptionSet = 2
+    }
+    
+    private var _state: UInt32 = 0
+    private var _sink: Disposable? = nil
+    private var _subscription: Disposable? = nil
+
+    var isDisposed: Bool {
+        return (_state & DisposeState.disposed.rawValue) != 0
+    }
+
+    func setSinkAndSubscription(sink: Disposable, subscription: Disposable) {
+        _sink = sink
+        _subscription = subscription
+
+        #if os(Linux)
+        _lock.lock()
+        let previousState = Int32(_state)
+        _state = _state | DisposeState.sinkAndSubscriptionSet.rawValue
+        // We know about `defer { _lock.unlock() }`, but this resolves Swift compiler bugs. Using `defer` here causes anomaly.
+        _lock.unlock()
+        #else
+        let previousState = OSAtomicOr32OrigBarrier(DisposeState.sinkAndSubscriptionSet.rawValue, &_state)
+        #endif
+        if (previousState & DisposeStateInt32.sinkAndSubscriptionSet.rawValue) != 0 {
+            rxFatalError("Sink and subscription were already set")
+        }
+
+        if (previousState & DisposeStateInt32.disposed.rawValue) != 0 {
+            sink.dispose()
+            subscription.dispose()
+            _sink = nil
+            _subscription = nil
+        }
+    }
+    
+    func dispose() {
+        #if os(Linux)
+        _lock.lock()
+        let previousState = Int32(_state)
+        _state = _state | DisposeState.disposed.rawValue
+        // We know about `defer { _lock.unlock() }`, but this resolves Swift compiler bugs. Using `defer` here causes anomaly.
+        _lock.unlock()
+        #else
+        let previousState = OSAtomicOr32OrigBarrier(DisposeState.disposed.rawValue, &_state)
+        #endif
+        if (previousState & DisposeStateInt32.disposed.rawValue) != 0 {
+            return
+        }
+
+        if (previousState & DisposeStateInt32.sinkAndSubscriptionSet.rawValue) != 0 {
+            guard let sink = _sink else {
+                rxFatalError("Sink not set")
+            }
+            guard let subscription = _subscription else {
+                rxFatalError("Subscription not set")
+            }
+
+            sink.dispose()
+            subscription.dispose()
+
+            _sink = nil
+            _subscription = nil
+        }
+    }
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Range.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Range.swift
index 8295c59..74ece4d 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Range.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Range.swift
@@ -1,6 +1,6 @@
 //
 //  Range.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 9/13/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,10 +8,10 @@
 
 import Foundation
 
-class RangeProducer<E: SignedIntegerType> : Producer<E> {
-    private let _start: E
-    private let _count: E
-    private let _scheduler: ImmediateSchedulerType
+class RangeProducer<E: SignedInteger> : Producer<E> {
+    fileprivate let _start: E
+    fileprivate let _count: E
+    fileprivate let _scheduler: ImmediateSchedulerType
 
     init(start: E, count: E, scheduler: ImmediateSchedulerType) {
         if count < 0 {
@@ -27,33 +27,33 @@ class RangeProducer<E: SignedIntegerType> : Producer<E> {
         _scheduler = scheduler
     }
     
-    override func run<O : ObserverType where O.E == E>(observer: O) -> Disposable {
-        let sink = RangeSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == E {
+        let sink = RangeSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
-class RangeSink<O: ObserverType where O.E: SignedIntegerType> : Sink<O> {
+class RangeSink<O: ObserverType> : Sink<O> where O.E: SignedInteger {
     typealias Parent = RangeProducer<O.E>
     
     private let _parent: Parent
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
         return _parent._scheduler.scheduleRecursive(0 as O.E) { i, recurse in
             if i < self._parent._count {
-                self.forwardOn(.Next(self._parent._start + i))
+                self.forwardOn(.next(self._parent._start + i))
                 recurse(i + 1)
             }
             else {
-                self.forwardOn(.Completed)
+                self.forwardOn(.completed)
                 self.dispose()
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Reduce.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Reduce.swift
index 10e03b8..f203709 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Reduce.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Reduce.swift
@@ -1,6 +1,6 @@
 //
 //  Reduce.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 4/1/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -15,35 +15,35 @@ class ReduceSink<SourceType, AccumulateType, O: ObserverType> : Sink<O>, Observe
     private let _parent: Parent
     private var _accumulation: AccumulateType
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
         _accumulation = parent._seed
         
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<SourceType>) {
+    func on(_ event: Event<SourceType>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             do {
                 _accumulation = try _parent._accumulator(_accumulation, value)
             }
             catch let e {
-                forwardOn(.Error(e))
+                forwardOn(.error(e))
                 dispose()
             }
-        case .Error(let e):
-            forwardOn(.Error(e))
+        case .error(let e):
+            forwardOn(.error(e))
             dispose()
-        case .Completed:
+        case .completed:
             do {
                 let result = try _parent._mapResult(_accumulation)
-                forwardOn(.Next(result))
-                forwardOn(.Completed)
+                forwardOn(.next(result))
+                forwardOn(.completed)
                 dispose()
             }
             catch let e {
-                forwardOn(.Error(e))
+                forwardOn(.error(e))
                 dispose()
             }
         }
@@ -54,21 +54,21 @@ class Reduce<SourceType, AccumulateType, ResultType> : Producer<ResultType> {
     typealias AccumulatorType = (AccumulateType, SourceType) throws -> AccumulateType
     typealias ResultSelectorType = (AccumulateType) throws -> ResultType
     
-    private let _source: Observable<SourceType>
-    private let _seed: AccumulateType
-    private let _accumulator: AccumulatorType
-    private let _mapResult: ResultSelectorType
+    fileprivate let _source: Observable<SourceType>
+    fileprivate let _seed: AccumulateType
+    fileprivate let _accumulator: AccumulatorType
+    fileprivate let _mapResult: ResultSelectorType
     
-    init(source: Observable<SourceType>, seed: AccumulateType, accumulator: AccumulatorType, mapResult: ResultSelectorType) {
+    init(source: Observable<SourceType>, seed: AccumulateType, accumulator: @escaping AccumulatorType, mapResult: @escaping ResultSelectorType) {
         _source = source
         _seed = seed
         _accumulator = accumulator
         _mapResult = mapResult
     }
-    
-    override func run<O: ObserverType where O.E == ResultType>(observer: O) -> Disposable {
-        let sink = ReduceSink(parent: self, observer: observer)
-        sink.disposable = _source.subscribe(sink)
-        return sink
+
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == ResultType {
+        let sink = ReduceSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = _source.subscribe(sink)
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/RefCount.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/RefCount.swift
index 1649dda..1c5e88c 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/RefCount.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/RefCount.swift
@@ -1,6 +1,6 @@
 //
 //  RefCount.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/5/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,17 +8,17 @@
 
 import Foundation
 
-class RefCountSink<CO: ConnectableObservableType, O: ObserverType where CO.E == O.E>
+class RefCountSink<CO: ConnectableObservableType, O: ObserverType>
     : Sink<O>
-    , ObserverType {
+    , ObserverType where CO.E == O.E {
     typealias Element = O.E
     typealias Parent = RefCount<CO>
     
     private let _parent: Parent
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
@@ -34,7 +34,7 @@ class RefCountSink<CO: ConnectableObservableType, O: ObserverType where CO.E ==
             }
         // }
         
-        return AnonymousDisposable {
+        return Disposables.create {
             subscription.dispose()
             self._parent._lock.lock(); defer { self._parent._lock.unlock() } // {
                 if self._parent._count == 1 {
@@ -52,11 +52,11 @@ class RefCountSink<CO: ConnectableObservableType, O: ObserverType where CO.E ==
         }
     }
 
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         switch event {
-        case .Next:
+        case .next:
             forwardOn(event)
-        case .Error, .Completed:
+        case .error, .completed:
             forwardOn(event)
             dispose()
         }
@@ -64,21 +64,21 @@ class RefCountSink<CO: ConnectableObservableType, O: ObserverType where CO.E ==
 }
 
 class RefCount<CO: ConnectableObservableType>: Producer<CO.E> {
-    private let _lock = NSRecursiveLock()
+    fileprivate let _lock = NSRecursiveLock()
     
     // state
-    private var _count = 0
-    private var _connectableSubscription = nil as Disposable?
+    fileprivate var _count = 0
+    fileprivate var _connectableSubscription = nil as Disposable?
     
-    private let _source: CO
+    fileprivate let _source: CO
     
     init(source: CO) {
         _source = source
     }
     
-    override func run<O: ObserverType where O.E == CO.E>(observer: O) -> Disposable {
-        let sink = RefCountSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == CO.E {
+        let sink = RefCountSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Repeat.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Repeat.swift
index 13b9cc7..90b850b 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Repeat.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Repeat.swift
@@ -1,6 +1,6 @@
 //
 //  Repeat.swift
-//  RxExample
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 9/13/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,19 +9,19 @@
 import Foundation
 
 class RepeatElement<Element> : Producer<Element> {
-    private let _element: Element
-    private let _scheduler: ImmediateSchedulerType
+    fileprivate let _element: Element
+    fileprivate let _scheduler: ImmediateSchedulerType
     
     init(element: Element, scheduler: ImmediateSchedulerType) {
         _element = element
         _scheduler = scheduler
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = RepeatElementSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = RepeatElementSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
 
-        return sink
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -30,15 +30,15 @@ class RepeatElementSink<O: ObserverType> : Sink<O> {
     
     private let _parent: Parent
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
         return _parent._scheduler.scheduleRecursive(_parent._element) { e, recurse in
-            self.forwardOn(.Next(e))
+            self.forwardOn(.next(e))
             recurse(e)
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/RetryWhen.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/RetryWhen.swift
index 724218e..00cba3d 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/RetryWhen.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/RetryWhen.swift
@@ -1,6 +1,6 @@
 //
 //  RetryWhen.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Junior B. on 06/10/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,51 +8,51 @@
 
 import Foundation
 
-class RetryTriggerSink<S: SequenceType, O: ObserverType, TriggerObservable: ObservableType, Error where S.Generator.Element : ObservableType, S.Generator.Element.E == O.E>
-    : ObserverType {
+class RetryTriggerSink<S: Sequence, O: ObserverType, TriggerObservable: ObservableType, Error>
+    : ObserverType where S.Iterator.Element : ObservableType, S.Iterator.Element.E == O.E {
     typealias E = TriggerObservable.E
     
     typealias Parent = RetryWhenSequenceSinkIter<S, O, TriggerObservable, Error>
     
-    private let _parent: Parent
+    fileprivate let _parent: Parent
 
     init(parent: Parent) {
         _parent = parent
     }
 
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         switch event {
-        case .Next:
+        case .next:
             _parent._parent._lastError = nil
-            _parent._parent.schedule(.MoveNext)
-        case .Error(let e):
-            _parent._parent.forwardOn(.Error(e))
+            _parent._parent.schedule(.moveNext)
+        case .error(let e):
+            _parent._parent.forwardOn(.error(e))
             _parent._parent.dispose()
-        case .Completed:
-            _parent._parent.forwardOn(.Completed)
+        case .completed:
+            _parent._parent.forwardOn(.completed)
             _parent._parent.dispose()
         }
     }
 }
 
-class RetryWhenSequenceSinkIter<S: SequenceType, O: ObserverType, TriggerObservable: ObservableType, Error where S.Generator.Element : ObservableType, S.Generator.Element.E == O.E>
+class RetryWhenSequenceSinkIter<S: Sequence, O: ObserverType, TriggerObservable: ObservableType, Error>
     : SingleAssignmentDisposable
-    , ObserverType {
+    , ObserverType where S.Iterator.Element : ObservableType, S.Iterator.Element.E == O.E {
     typealias E = O.E
     typealias Parent = RetryWhenSequenceSink<S, O, TriggerObservable, Error>
 
-    private let _parent: Parent
-    private let _errorHandlerSubscription = SingleAssignmentDisposable()
+    fileprivate let _parent: Parent
+    fileprivate let _errorHandlerSubscription = SingleAssignmentDisposable()
 
     init(parent: Parent) {
         _parent = parent
     }
 
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         switch event {
-        case .Next:
+        case .next:
             _parent.forwardOn(event)
-        case .Error(let error):
+        case .error(let error):
             _parent._lastError = error
 
             if let failedWith = error as? Error {
@@ -60,14 +60,14 @@ class RetryWhenSequenceSinkIter<S: SequenceType, O: ObserverType, TriggerObserva
                 super.dispose()
 
                 let errorHandlerSubscription = _parent._notifier.subscribe(RetryTriggerSink(parent: self))
-                _errorHandlerSubscription.disposable = errorHandlerSubscription
-                _parent._errorSubject.on(.Next(failedWith))
+                _errorHandlerSubscription.setDisposable(errorHandlerSubscription)
+                _parent._errorSubject.on(.next(failedWith))
             }
             else {
-                _parent.forwardOn(.Error(error))
+                _parent.forwardOn(.error(error))
                 _parent.dispose()
             }
-        case .Completed:
+        case .completed:
             _parent.forwardOn(event)
             _parent.dispose()
         }
@@ -79,72 +79,72 @@ class RetryWhenSequenceSinkIter<S: SequenceType, O: ObserverType, TriggerObserva
     }
 }
 
-class RetryWhenSequenceSink<S: SequenceType, O: ObserverType, TriggerObservable: ObservableType, Error where S.Generator.Element : ObservableType, S.Generator.Element.E == O.E>
-    : TailRecursiveSink<S, O> {
+class RetryWhenSequenceSink<S: Sequence, O: ObserverType, TriggerObservable: ObservableType, Error>
+    : TailRecursiveSink<S, O> where S.Iterator.Element : ObservableType, S.Iterator.Element.E == O.E {
     typealias Element = O.E
     typealias Parent = RetryWhenSequence<S, TriggerObservable, Error>
     
     let _lock = NSRecursiveLock()
     
-    private let _parent: Parent
+    fileprivate let _parent: Parent
     
-    private var _lastError: ErrorType?
-    private let _errorSubject = PublishSubject<Error>()
-    private let _handler: Observable<TriggerObservable.E>
-    private let _notifier = PublishSubject<TriggerObservable.E>()
+    fileprivate var _lastError: Swift.Error?
+    fileprivate let _errorSubject = PublishSubject<Error>()
+    fileprivate let _handler: Observable<TriggerObservable.E>
+    fileprivate let _notifier = PublishSubject<TriggerObservable.E>()
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
         _handler = parent._notificationHandler(_errorSubject).asObservable()
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     override func done() {
         if let lastError = _lastError {
-            forwardOn(.Error(lastError))
+            forwardOn(.error(lastError))
             _lastError = nil
         }
         else {
-            forwardOn(.Completed)
+            forwardOn(.completed)
         }
 
         dispose()
     }
     
-    override func extract(observable: Observable<E>) -> SequenceGenerator? {
+    override func extract(_ observable: Observable<E>) -> SequenceGenerator? {
         // It is important to always return `nil` here because there are sideffects in the `run` method
         // that are dependant on particular `retryWhen` operator so single operator stack can't be reused in this
         // case.
         return nil
     }
 
-    override func subscribeToNext(source: Observable<E>) -> Disposable {
+    override func subscribeToNext(_ source: Observable<E>) -> Disposable {
         let iter = RetryWhenSequenceSinkIter(parent: self)
-        iter.disposable = source.subscribe(iter)
+        iter.setDisposable(source.subscribe(iter))
         return iter
     }
 
-    override func run(sources: SequenceGenerator) -> Disposable {
+    override func run(_ sources: SequenceGenerator) -> Disposable {
         let triggerSubscription = _handler.subscribe(_notifier.asObserver())
         let superSubscription = super.run(sources)
-        return StableCompositeDisposable.create(superSubscription, triggerSubscription)
+        return Disposables.create(superSubscription, triggerSubscription)
     }
 }
 
-class RetryWhenSequence<S: SequenceType, TriggerObservable: ObservableType, Error where S.Generator.Element : ObservableType> : Producer<S.Generator.Element.E> {
-    typealias Element = S.Generator.Element.E
+class RetryWhenSequence<S: Sequence, TriggerObservable: ObservableType, Error> : Producer<S.Iterator.Element.E> where S.Iterator.Element : ObservableType {
+    typealias Element = S.Iterator.Element.E
     
-    private let _sources: S
-    private let _notificationHandler: Observable<Error> -> TriggerObservable
+    fileprivate let _sources: S
+    fileprivate let _notificationHandler: (Observable<Error>) -> TriggerObservable
     
-    init(sources: S, notificationHandler: Observable<Error> -> TriggerObservable) {
+    init(sources: S, notificationHandler: @escaping (Observable<Error>) -> TriggerObservable) {
         _sources = sources
         _notificationHandler = notificationHandler
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = RetryWhenSequenceSink<S, O, TriggerObservable, Error>(parent: self, observer: observer)
-        sink.disposable = sink.run((self._sources.generate(), nil))
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = RetryWhenSequenceSink<S, O, TriggerObservable, Error>(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run((self._sources.makeIterator(), nil))
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Sample.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Sample.swift
index a8f0ad4..7190bfb 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Sample.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Sample.swift
@@ -8,15 +8,15 @@
 
 import Foundation
 
-class SamplerSink<O: ObserverType, ElementType, SampleType where O.E == ElementType>
+class SamplerSink<O: ObserverType, ElementType, SampleType>
     : ObserverType
     , LockOwnerType
-    , SynchronizedOnType {
+    , SynchronizedOnType where O.E == ElementType {
     typealias E = SampleType
     
     typealias Parent = SampleSequenceSink<O, SampleType>
     
-    private let _parent: Parent
+    fileprivate let _parent: Parent
 
     var _lock: NSRecursiveLock {
         return _parent._lock
@@ -26,35 +26,35 @@ class SamplerSink<O: ObserverType, ElementType, SampleType where O.E == ElementT
         _parent = parent
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         switch event {
-        case .Next:
+        case .next:
             if let element = _parent._element {
                 if _parent._parent._onlyNew {
                     _parent._element = nil
                 }
                 
-                _parent.forwardOn(.Next(element))
+                _parent.forwardOn(.next(element))
             }
 
             if _parent._atEnd {
-                _parent.forwardOn(.Completed)
+                _parent.forwardOn(.completed)
                 _parent.dispose()
             }
-        case .Error(let e):
-            _parent.forwardOn(.Error(e))
+        case .error(let e):
+            _parent.forwardOn(.error(e))
             _parent.dispose()
-        case .Completed:
+        case .completed:
             if let element = _parent._element {
                 _parent._element = nil
-                _parent.forwardOn(.Next(element))
+                _parent.forwardOn(.next(element))
             }
             if _parent._atEnd {
-                _parent.forwardOn(.Completed)
+                _parent.forwardOn(.completed)
                 _parent.dispose()
             }
         }
@@ -69,40 +69,40 @@ class SampleSequenceSink<O: ObserverType, SampleType>
     typealias Element = O.E
     typealias Parent = Sample<Element, SampleType>
     
-    private let _parent: Parent
+    fileprivate let _parent: Parent
 
     let _lock = NSRecursiveLock()
     
     // state
-    private var _element = nil as Element?
-    private var _atEnd = false
+    fileprivate var _element = nil as Element?
+    fileprivate var _atEnd = false
     
-    private let _sourceSubscription = SingleAssignmentDisposable()
+    fileprivate let _sourceSubscription = SingleAssignmentDisposable()
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
-        _sourceSubscription.disposable = _parent._source.subscribe(self)
+        _sourceSubscription.setDisposable(_parent._source.subscribe(self))
         let samplerSubscription = _parent._sampler.subscribe(SamplerSink(parent: self))
         
-        return StableCompositeDisposable.create(_sourceSubscription, samplerSubscription)
+        return Disposables.create(_sourceSubscription, samplerSubscription)
     }
     
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<Element>) {
+    func _synchronized_on(_ event: Event<Element>) {
         switch event {
-        case .Next(let element):
+        case .next(let element):
             _element = element
-        case .Error:
+        case .error:
             forwardOn(event)
             dispose()
-        case .Completed:
+        case .completed:
             _atEnd = true
             _sourceSubscription.dispose()
         }
@@ -111,9 +111,9 @@ class SampleSequenceSink<O: ObserverType, SampleType>
 }
 
 class Sample<Element, SampleType> : Producer<Element> {
-    private let _source: Observable<Element>
-    private let _sampler: Observable<SampleType>
-    private let _onlyNew: Bool
+    fileprivate let _source: Observable<Element>
+    fileprivate let _sampler: Observable<SampleType>
+    fileprivate let _onlyNew: Bool
 
     init(source: Observable<Element>, sampler: Observable<SampleType>, onlyNew: Bool) {
         _source = source
@@ -121,9 +121,9 @@ class Sample<Element, SampleType> : Producer<Element> {
         _onlyNew = onlyNew
     }
     
-    override func run<O: ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = SampleSequenceSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = SampleSequenceSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Scan.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Scan.swift
index 958dd69..dbb9173 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Scan.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Scan.swift
@@ -8,35 +8,35 @@
 
 import Foundation
 
-class ScanSink<ElementType, Accumulate, O: ObserverType where O.E == Accumulate> : Sink<O>, ObserverType {
+class ScanSink<ElementType, Accumulate, O: ObserverType> : Sink<O>, ObserverType where O.E == Accumulate {
     typealias Parent = Scan<ElementType, Accumulate>
     typealias E = ElementType
     
-    private let _parent: Parent
-    private var _accumulate: Accumulate
+    fileprivate let _parent: Parent
+    fileprivate var _accumulate: Accumulate
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
         _accumulate = parent._seed
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<ElementType>) {
+    func on(_ event: Event<ElementType>) {
         switch event {
-        case .Next(let element):
+        case .next(let element):
             do {
                 _accumulate = try _parent._accumulator(_accumulate, element)
-                forwardOn(.Next(_accumulate))
+                forwardOn(.next(_accumulate))
             }
             catch let error {
-                forwardOn(.Error(error))
+                forwardOn(.error(error))
                 dispose()
             }
-        case .Error(let error):
-            forwardOn(.Error(error))
+        case .error(let error):
+            forwardOn(.error(error))
             dispose()
-        case .Completed:
-            forwardOn(.Completed)
+        case .completed:
+            forwardOn(.completed)
             dispose()
         }
     }
@@ -46,19 +46,19 @@ class ScanSink<ElementType, Accumulate, O: ObserverType where O.E == Accumulate>
 class Scan<Element, Accumulate>: Producer<Accumulate> {
     typealias Accumulator = (Accumulate, Element) throws -> Accumulate
     
-    private let _source: Observable<Element>
-    private let _seed: Accumulate
-    private let _accumulator: Accumulator
+    fileprivate let _source: Observable<Element>
+    fileprivate let _seed: Accumulate
+    fileprivate let _accumulator: Accumulator
     
-    init(source: Observable<Element>, seed: Accumulate, accumulator: Accumulator) {
+    init(source: Observable<Element>, seed: Accumulate, accumulator: @escaping Accumulator) {
         _source = source
         _seed = seed
         _accumulator = accumulator
     }
     
-    override func run<O : ObserverType where O.E == Accumulate>(observer: O) -> Disposable {
-        let sink = ScanSink(parent: self, observer: observer)
-        sink.disposable = _source.subscribe(sink)
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Accumulate {
+        let sink = ScanSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = _source.subscribe(sink)
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Sequence.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Sequence.swift
index 63ee713..b5f972d 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Sequence.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Sequence.swift
@@ -1,6 +1,6 @@
 //
 //  Sequence.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 11/14/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,51 +8,42 @@
 
 import Foundation
 
-class SequenceSink<O: ObserverType> : Sink<O> {
-    typealias Parent = Sequence<O.E>
+class ObservableSequenceSink<S: Sequence, O: ObserverType> : Sink<O> where S.Iterator.Element == O.E {
+    typealias Parent = ObservableSequence<S>
 
     private let _parent: Parent
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
 
     func run() -> Disposable {
-        return _parent._scheduler!.scheduleRecursive((0, _parent._elements)) { (state, recurse) in
-            if state.0 < state.1.count {
-                self.forwardOn(.Next(state.1[state.0]))
-                recurse((state.0 + 1, state.1))
+        return _parent._scheduler.scheduleRecursive((_parent._elements.makeIterator(), _parent._elements)) { (iterator, recurse) in
+            var mutableIterator = iterator
+            if let next = mutableIterator.0.next() {
+                self.forwardOn(.next(next))
+                recurse(mutableIterator)
             }
             else {
-                self.forwardOn(.Completed)
+                self.forwardOn(.completed)
             }
         }
     }
 }
 
-class Sequence<E> : Producer<E> {
-    private let _elements: [E]
-    private let _scheduler: ImmediateSchedulerType?
+class ObservableSequence<S: Sequence> : Producer<S.Iterator.Element> {
+    fileprivate let _elements: S
+    fileprivate let _scheduler: ImmediateSchedulerType
 
-    init(elements: [E], scheduler: ImmediateSchedulerType?) {
+    init(elements: S, scheduler: ImmediateSchedulerType) {
         _elements = elements
         _scheduler = scheduler
     }
 
-    override func subscribe<O : ObserverType where O.E == E>(observer: O) -> Disposable {
-        // optimized version without scheduler
-        guard _scheduler != nil else {
-            for element in _elements {
-                observer.on(.Next(element))
-            }
-            
-            observer.on(.Completed)
-            return NopDisposable.instance
-        }
-
-        let sink = SequenceSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == E {
+        let sink = ObservableSequenceSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ShareReplay1.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ShareReplay1.swift
index 52cb5eb..6f7497b 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ShareReplay1.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ShareReplay1.swift
@@ -1,6 +1,6 @@
 //
 //  ShareReplay1.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 10/10/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -30,19 +30,19 @@ final class ShareReplay1<Element>
         self._source = source
     }
 
-    override func subscribe<O : ObserverType where O.E == E>(observer: O) -> Disposable {
+    override func subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == E {
         _lock.lock(); defer { _lock.unlock() }
         return _synchronized_subscribe(observer)
     }
 
-    func _synchronized_subscribe<O : ObserverType where O.E == E>(observer: O) -> Disposable {
+    func _synchronized_subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == E {
         if let element = self._element {
-            observer.on(.Next(element))
+            observer.on(.next(element))
         }
 
         if let stopEvent = self._stopEvent {
             observer.on(stopEvent)
-            return NopDisposable.instance
+            return Disposables.create()
         }
 
         let initialCount = self._observers.count
@@ -53,18 +53,18 @@ final class ShareReplay1<Element>
             let connection = SingleAssignmentDisposable()
             _connection = connection
 
-            connection.disposable = self._source.subscribe(self)
+            connection.setDisposable(self._source.subscribe(self))
         }
 
         return SubscriptionDisposable(owner: self, key: disposeKey)
     }
 
-    func synchronizedUnsubscribe(disposeKey: DisposeKey) {
+    func synchronizedUnsubscribe(_ disposeKey: DisposeKey) {
         _lock.lock(); defer { _lock.unlock() }
         _synchronized_unsubscribe(disposeKey)
     }
 
-    func _synchronized_unsubscribe(disposeKey: DisposeKey) {
+    func _synchronized_unsubscribe(_ disposeKey: DisposeKey) {
         // if already unsubscribed, just return
         if self._observers.removeKey(disposeKey) == nil {
             return
@@ -76,26 +76,26 @@ final class ShareReplay1<Element>
         }
     }
 
-    func on(event: Event<E>) {
-        _lock.lock(); defer { _lock.unlock() }
-        _synchronized_on(event)
+    func on(_ event: Event<E>) {
+        _synchronized_on(event).on(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) -> Bag<AnyObserver<Element>> {
+        _lock.lock(); defer { _lock.unlock() }
         if _stopped {
-            return
+            return Bag()
         }
 
         switch event {
-        case .Next(let element):
+        case .next(let element):
             _element = element
-        case .Error, .Completed:
+        case .error, .completed:
             _stopEvent = event
             _stopped = true
             _connection?.dispose()
             _connection = nil
         }
 
-        _observers.on(event)
+        return _observers
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ShareReplay1WhileConnected.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ShareReplay1WhileConnected.swift
index af776b1..fa8c252 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ShareReplay1WhileConnected.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ShareReplay1WhileConnected.swift
@@ -1,6 +1,6 @@
 //
 //  ShareReplay1WhileConnected.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 12/6/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -28,14 +28,14 @@ final class ShareReplay1WhileConnected<Element>
         self._source = source
     }
 
-    override func subscribe<O : ObserverType where O.E == E>(observer: O) -> Disposable {
+    override func subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == E {
         _lock.lock(); defer { _lock.unlock() }
         return _synchronized_subscribe(observer)
     }
 
-    func _synchronized_subscribe<O : ObserverType where O.E == E>(observer: O) -> Disposable {
+    func _synchronized_subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == E {
         if let element = self._element {
-            observer.on(.Next(element))
+            observer.on(.next(element))
         }
 
         let initialCount = self._observers.count
@@ -46,18 +46,18 @@ final class ShareReplay1WhileConnected<Element>
             let connection = SingleAssignmentDisposable()
             _connection = connection
 
-            connection.disposable = self._source.subscribe(self)
+            connection.setDisposable(self._source.subscribe(self))
         }
 
         return SubscriptionDisposable(owner: self, key: disposeKey)
     }
 
-    func synchronizedUnsubscribe(disposeKey: DisposeKey) {
+    func synchronizedUnsubscribe(_ disposeKey: DisposeKey) {
         _lock.lock(); defer { _lock.unlock() }
         _synchronized_unsubscribe(disposeKey)
     }
 
-    func _synchronized_unsubscribe(disposeKey: DisposeKey) {
+    func _synchronized_unsubscribe(_ disposeKey: DisposeKey) {
         // if already unsubscribed, just return
         if self._observers.removeKey(disposeKey) == nil {
             return
@@ -70,23 +70,23 @@ final class ShareReplay1WhileConnected<Element>
         }
     }
 
-    func on(event: Event<E>) {
-        _lock.lock(); defer { _lock.unlock() }
-        _synchronized_on(event)
+    func on(_ event: Event<E>) {
+        _synchronized_on(event).on(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) -> Bag<AnyObserver<Element>> {
+        _lock.lock(); defer { _lock.unlock() }
         switch event {
-        case .Next(let element):
+        case .next(let element):
             _element = element
-            _observers.on(event)
-        case .Error, .Completed:
+            return _observers
+        case .error, .completed:
             _element = nil
             _connection?.dispose()
             _connection = nil
             let observers = _observers
             _observers = Bag()
-            observers.on(event)
+            return observers
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SingleAsync.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SingleAsync.swift
index af7a09a..e0316fd 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SingleAsync.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SingleAsync.swift
@@ -1,6 +1,6 @@
 //
 //  SingleAsync.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Junior B. on 09/11/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,21 +8,21 @@
 
 import Foundation
 
-class SingleAsyncSink<ElementType, O: ObserverType where O.E == ElementType> : Sink<O>, ObserverType {
+class SingleAsyncSink<ElementType, O: ObserverType> : Sink<O>, ObserverType where O.E == ElementType {
     typealias Parent = SingleAsync<ElementType>
     typealias E = ElementType
     
     private let _parent: Parent
     private var _seenValue: Bool = false
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             do {
                 let forward = try _parent._predicate?(value) ?? true
                 if !forward {
@@ -30,27 +30,27 @@ class SingleAsyncSink<ElementType, O: ObserverType where O.E == ElementType> : S
                 }
             }
             catch let error {
-                forwardOn(.Error(error as ErrorType))
+                forwardOn(.error(error as Swift.Error))
                 dispose()
                 return
             }
 
             if _seenValue == false {
                 _seenValue = true
-                forwardOn(.Next(value))
+                forwardOn(.next(value))
             } else {
-                forwardOn(.Error(RxError.MoreThanOneElement))
+                forwardOn(.error(RxError.moreThanOneElement))
                 dispose()
             }
             
-        case .Error:
+        case .error:
             forwardOn(event)
             dispose()
-        case .Completed:
+        case .completed:
             if (!_seenValue) {
-                forwardOn(.Error(RxError.NoElements))
+                forwardOn(.error(RxError.noElements))
             } else {
-                forwardOn(.Completed)
+                forwardOn(.completed)
             }
             dispose()
         }
@@ -60,17 +60,17 @@ class SingleAsyncSink<ElementType, O: ObserverType where O.E == ElementType> : S
 class SingleAsync<Element>: Producer<Element> {
     typealias Predicate = (Element) throws -> Bool
     
-    private let _source: Observable<Element>
-    private let _predicate: Predicate?
+    fileprivate let _source: Observable<Element>
+    fileprivate let _predicate: Predicate?
     
     init(source: Observable<Element>, predicate: Predicate? = nil) {
         _source = source
         _predicate = predicate
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = SingleAsyncSink(parent: self, observer: observer)
-        sink.disposable = _source.subscribe(sink)
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = SingleAsyncSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = _source.subscribe(sink)
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Sink.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Sink.swift
index dff961f..21e1d78 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Sink.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Sink.swift
@@ -1,6 +1,6 @@
 //
 //  Sink.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/19/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,18 +8,22 @@
 
 import Foundation
 
-class Sink<O : ObserverType> : SingleAssignmentDisposable {
-    private let _observer: O
+class Sink<O : ObserverType> : Disposable {
+    fileprivate let _observer: O
+    fileprivate let _cancel: Cancelable
+    fileprivate var _disposed: Bool
 
-    init(observer: O) {
+    init(observer: O, cancel: Cancelable) {
 #if TRACE_RESOURCES
-        AtomicIncrement(&resourceCount)
+        let _ = Resources.incrementTotal()
 #endif
         _observer = observer
+        _cancel = cancel
+        _disposed = false
     }
     
-    final func forwardOn(event: Event<O.E>) {
-        if disposed {
+    final func forwardOn(_ event: Event<O.E>) {
+        if _disposed {
             return
         }
         _observer.on(event)
@@ -29,9 +33,18 @@ class Sink<O : ObserverType> : SingleAssignmentDisposable {
         return SinkForward(forward: self)
     }
 
+    var disposed: Bool {
+        return _disposed
+    }
+
+    func dispose() {
+        _disposed = true
+        _cancel.dispose()
+    }
+
     deinit {
 #if TRACE_RESOURCES
-        AtomicDecrement(&resourceCount)
+       let _ =  Resources.decrementTotal()
 #endif
     }
 }
@@ -45,13 +58,13 @@ class SinkForward<O: ObserverType>: ObserverType {
         _forward = forward
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         switch event {
-        case .Next:
+        case .next:
             _forward._observer.on(event)
-        case .Error, .Completed:
+        case .error, .completed:
             _forward._observer.on(event)
-            _forward.dispose()
+            _forward._cancel.dispose()
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Skip.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Skip.swift
index 2c1bf40..95252c4 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Skip.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Skip.swift
@@ -10,7 +10,7 @@ import Foundation
 
 // count version
 
-class SkipCountSink<ElementType, O: ObserverType where O.E == ElementType> : Sink<O>, ObserverType {
+class SkipCountSink<ElementType, O: ObserverType> : Sink<O>, ObserverType where O.E == ElementType {
     typealias Parent = SkipCount<ElementType>
     typealias Element = ElementType
     
@@ -18,26 +18,26 @@ class SkipCountSink<ElementType, O: ObserverType where O.E == ElementType> : Sin
     
     var remaining: Int
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         self.parent = parent
         self.remaining = parent.count
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             
             if remaining <= 0 {
-                forwardOn(.Next(value))
+                forwardOn(.next(value))
             }
             else {
                 remaining -= 1
             }
-        case .Error:
+        case .error:
             forwardOn(event)
             self.dispose()
-        case .Completed:
+        case .completed:
             forwardOn(event)
             self.dispose()
         }
@@ -54,17 +54,17 @@ class SkipCount<Element>: Producer<Element> {
         self.count = count
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = SkipCountSink(parent: self, observer: observer)
-        sink.disposable = source.subscribe(sink)
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = SkipCountSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = source.subscribe(sink)
 
-        return sink
+        return (sink: sink, subscription: subscription)
     }
 }
 
 // time version
 
-class SkipTimeSink<ElementType, O: ObserverType where O.E == ElementType> : Sink<O>, ObserverType {
+class SkipTimeSink<ElementType, O: ObserverType> : Sink<O>, ObserverType where O.E == ElementType {
     typealias Parent = SkipTime<ElementType>
     typealias Element = ElementType
 
@@ -73,21 +73,21 @@ class SkipTimeSink<ElementType, O: ObserverType where O.E == ElementType> : Sink
     // state
     var open = false
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         self.parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             if open {
-                forwardOn(.Next(value))
+                forwardOn(.next(value))
             }
-        case .Error:
+        case .error:
             forwardOn(event)
             self.dispose()
-        case .Completed:
+        case .completed:
             forwardOn(event)
             self.dispose()
         }
@@ -100,12 +100,12 @@ class SkipTimeSink<ElementType, O: ObserverType where O.E == ElementType> : Sink
     func run() -> Disposable {
         let disposeTimer = parent.scheduler.scheduleRelative((), dueTime: self.parent.duration) {
             self.tick()
-            return NopDisposable.instance
+            return Disposables.create()
         }
         
         let disposeSubscription = parent.source.subscribe(self)
         
-        return BinaryDisposable(disposeTimer, disposeSubscription)
+        return Disposables.create(disposeTimer, disposeSubscription)
     }
 }
 
@@ -120,9 +120,9 @@ class SkipTime<Element>: Producer<Element> {
         self.duration = duration
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = SkipTimeSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = SkipTimeSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SkipUntil.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SkipUntil.swift
index 97c7680..8217730 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SkipUntil.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SkipUntil.swift
@@ -1,6 +1,6 @@
 //
 //  SkipUntil.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Yury Korolev on 10/3/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,14 +8,14 @@
 
 import Foundation
 
-class SkipUntilSinkOther<ElementType, Other, O: ObserverType where O.E == ElementType>
+class SkipUntilSinkOther<ElementType, Other, O: ObserverType>
     : ObserverType
     , LockOwnerType
-    , SynchronizedOnType {
+    , SynchronizedOnType where O.E == ElementType {
     typealias Parent = SkipUntilSink<ElementType, Other, O>
     typealias E = Other
     
-    private let _parent: Parent
+    fileprivate let _parent: Parent
 
     var _lock: NSRecursiveLock {
         return _parent._lock
@@ -26,69 +26,69 @@ class SkipUntilSinkOther<ElementType, Other, O: ObserverType where O.E == Elemen
     init(parent: Parent) {
         _parent = parent
         #if TRACE_RESOURCES
-            AtomicIncrement(&resourceCount)
+            let _ = Resources.incrementTotal()
         #endif
     }
 
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         switch event {
-        case .Next:
+        case .next:
             _parent._forwardElements = true
             _subscription.dispose()
-        case .Error(let e):
-            _parent.forwardOn(.Error(e))
+        case .error(let e):
+            _parent.forwardOn(.error(e))
             _parent.dispose()
-        case .Completed:
+        case .completed:
             _subscription.dispose()
         }
     }
     
     #if TRACE_RESOURCES
     deinit {
-        AtomicDecrement(&resourceCount)
+        let _ = Resources.decrementTotal()
     }
     #endif
 
 }
 
 
-class SkipUntilSink<ElementType, Other, O: ObserverType where O.E == ElementType>
+class SkipUntilSink<ElementType, Other, O: ObserverType>
     : Sink<O>
     , ObserverType
     , LockOwnerType
-    , SynchronizedOnType {
+    , SynchronizedOnType where O.E == ElementType {
     typealias E = ElementType
     typealias Parent = SkipUntil<E, Other>
     
     let _lock = NSRecursiveLock()
-    private let _parent: Parent
-    private var _forwardElements = false
+    fileprivate let _parent: Parent
+    fileprivate var _forwardElements = false
     
-    private let _sourceSubscription = SingleAssignmentDisposable()
+    fileprivate let _sourceSubscription = SingleAssignmentDisposable()
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         switch event {
-        case .Next:
+        case .next:
             if _forwardElements {
                 forwardOn(event)
             }
-        case .Error:
+        case .error:
             forwardOn(event)
             dispose()
-        case .Completed:
+        case .completed:
             if _forwardElements {
                 forwardOn(event)
             }
@@ -100,26 +100,26 @@ class SkipUntilSink<ElementType, Other, O: ObserverType where O.E == ElementType
         let sourceSubscription = _parent._source.subscribe(self)
         let otherObserver = SkipUntilSinkOther(parent: self)
         let otherSubscription = _parent._other.subscribe(otherObserver)
-        _sourceSubscription.disposable = sourceSubscription
-        otherObserver._subscription.disposable = otherSubscription
+        _sourceSubscription.setDisposable(sourceSubscription)
+        otherObserver._subscription.setDisposable(otherSubscription)
         
-        return StableCompositeDisposable.create(_sourceSubscription, otherObserver._subscription)
+        return Disposables.create(_sourceSubscription, otherObserver._subscription)
     }
 }
 
 class SkipUntil<Element, Other>: Producer<Element> {
     
-    private let _source: Observable<Element>
-    private let _other: Observable<Other>
+    fileprivate let _source: Observable<Element>
+    fileprivate let _other: Observable<Other>
     
     init(source: Observable<Element>, other: Observable<Other>) {
         _source = source
         _other = other
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = SkipUntilSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = SkipUntilSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SkipWhile.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SkipWhile.swift
index d16304a..4f5610a 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SkipWhile.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SkipWhile.swift
@@ -1,79 +1,79 @@
 //
 //  SkipWhile.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Yury Korolev on 10/9/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
 //
 
-class SkipWhileSink<ElementType, O: ObserverType where O.E == ElementType> : Sink<O>, ObserverType {
+class SkipWhileSink<ElementType, O: ObserverType> : Sink<O>, ObserverType where O.E == ElementType {
 
     typealias Parent = SkipWhile<ElementType>
     typealias Element = ElementType
 
-    private let _parent: Parent
-    private var _running = false
+    fileprivate let _parent: Parent
+    fileprivate var _running = false
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
 
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             if !_running {
                 do {
                     _running = try !_parent._predicate(value)
                 } catch let e {
-                    forwardOn(.Error(e))
+                    forwardOn(.error(e))
                     dispose()
                     return
                 }
             }
 
             if _running {
-                forwardOn(.Next(value))
+                forwardOn(.next(value))
             }
-        case .Error, .Completed:
+        case .error, .completed:
             forwardOn(event)
             dispose()
         }
     }
 }
 
-class SkipWhileSinkWithIndex<ElementType, O: ObserverType where O.E == ElementType> : Sink<O>, ObserverType {
+class SkipWhileSinkWithIndex<ElementType, O: ObserverType> : Sink<O>, ObserverType where O.E == ElementType {
 
     typealias Parent = SkipWhile<ElementType>
     typealias Element = ElementType
 
-    private let _parent: Parent
-    private var _index = 0
-    private var _running = false
+    fileprivate let _parent: Parent
+    fileprivate var _index = 0
+    fileprivate var _running = false
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
 
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             if !_running {
                 do {
                     _running = try !_parent._predicateWithIndex(value, _index)
-                    try incrementChecked(&_index)
+                    let _ = try incrementChecked(&_index)
                 } catch let e {
-                    forwardOn(.Error(e))
+                    forwardOn(.error(e))
                     dispose()
                     return
                 }
             }
 
             if _running {
-                forwardOn(.Next(value))
+                forwardOn(.next(value))
             }
-        case .Error, .Completed:
+        case .error, .completed:
             forwardOn(event)
             dispose()
         }
@@ -84,32 +84,32 @@ class SkipWhile<Element>: Producer<Element> {
     typealias Predicate = (Element) throws -> Bool
     typealias PredicateWithIndex = (Element, Int) throws -> Bool
 
-    private let _source: Observable<Element>
-    private let _predicate: Predicate!
-    private let _predicateWithIndex: PredicateWithIndex!
+    fileprivate let _source: Observable<Element>
+    fileprivate let _predicate: Predicate!
+    fileprivate let _predicateWithIndex: PredicateWithIndex!
 
-    init(source: Observable<Element>, predicate: Predicate) {
+    init(source: Observable<Element>, predicate: @escaping Predicate) {
         _source = source
         _predicate = predicate
         _predicateWithIndex = nil
     }
 
-    init(source: Observable<Element>, predicate: PredicateWithIndex) {
+    init(source: Observable<Element>, predicate: @escaping PredicateWithIndex) {
         _source = source
         _predicate = nil
         _predicateWithIndex = predicate
     }
 
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
         if let _ = _predicate {
-            let sink = SkipWhileSink(parent: self, observer: observer)
-            sink.disposable = _source.subscribe(sink)
-            return sink
+            let sink = SkipWhileSink(parent: self, observer: observer, cancel: cancel)
+            let subscription = _source.subscribe(sink)
+            return (sink: sink, subscription: subscription)
         }
         else {
-            let sink = SkipWhileSinkWithIndex(parent: self, observer: observer)
-            sink.disposable = _source.subscribe(sink)
-            return sink
+            let sink = SkipWhileSinkWithIndex(parent: self, observer: observer, cancel: cancel)
+            let subscription = _source.subscribe(sink)
+            return (sink: sink, subscription: subscription)
         }
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/StartWith.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/StartWith.swift
index c60cb36..a5ac927 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/StartWith.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/StartWith.swift
@@ -1,6 +1,6 @@
 //
 //  StartWith.swift
-//  RxCocoa
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 4/6/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -18,11 +18,11 @@ class StartWith<Element>: Producer<Element> {
         super.init()
     }
 
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
         for e in elements {
-            observer.on(.Next(e))
+            observer.on(.next(e))
         }
 
-        return source.subscribe(observer)
+        return (sink: Disposables.create(), subscription: source.subscribe(observer))
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SubscribeOn.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SubscribeOn.swift
index 1f16760..b2f871c 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SubscribeOn.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/SubscribeOn.swift
@@ -8,18 +8,18 @@
 
 import Foundation
 
-class SubscribeOnSink<Ob: ObservableType, O: ObserverType where Ob.E == O.E> : Sink<O>, ObserverType {
+class SubscribeOnSink<Ob: ObservableType, O: ObserverType> : Sink<O>, ObserverType where Ob.E == O.E {
     typealias Element = O.E
     typealias Parent = SubscribeOn<Ob>
     
     let parent: Parent
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         self.parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         forwardOn(event)
         
         if event.isStopEvent {
@@ -33,11 +33,13 @@ class SubscribeOnSink<Ob: ObservableType, O: ObserverType where Ob.E == O.E> : S
         
         disposeEverything.disposable = cancelSchedule
         
-        cancelSchedule.disposable = parent.scheduler.schedule(()) { (_) -> Disposable in
+        let disposeSchedule = parent.scheduler.schedule(()) { (_) -> Disposable in
             let subscription = self.parent.source.subscribe(self)
             disposeEverything.disposable = ScheduledDisposable(scheduler: self.parent.scheduler, disposable: subscription)
-            return NopDisposable.instance
+            return Disposables.create()
         }
+
+        cancelSchedule.setDisposable(disposeSchedule)
     
         return disposeEverything
     }
@@ -52,9 +54,9 @@ class SubscribeOn<Ob: ObservableType> : Producer<Ob.E> {
         self.scheduler = scheduler
     }
     
-    override func run<O : ObserverType where O.E == Ob.E>(observer: O) -> Disposable {
-        let sink = SubscribeOnSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Ob.E {
+        let sink = SubscribeOnSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Switch.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Switch.swift
index ca31c0f..5b8e34f 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Switch.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Switch.swift
@@ -1,6 +1,6 @@
 //
 //  Switch.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/12/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,44 +8,44 @@
 
 import Foundation
 
-class SwitchSink<SourceType, S: ObservableConvertibleType, O: ObserverType where S.E == O.E>
+class SwitchSink<SourceType, S: ObservableConvertibleType, O: ObserverType>
     : Sink<O>
     , ObserverType
     , LockOwnerType
-    , SynchronizedOnType {
+    , SynchronizedOnType where S.E == O.E {
     typealias E = SourceType
 
-    private let _subscriptions: SingleAssignmentDisposable = SingleAssignmentDisposable()
-    private let _innerSubscription: SerialDisposable = SerialDisposable()
+    fileprivate let _subscriptions: SingleAssignmentDisposable = SingleAssignmentDisposable()
+    fileprivate let _innerSubscription: SerialDisposable = SerialDisposable()
 
     let _lock = NSRecursiveLock()
     
     // state
-    private var _stopped = false
-    private var _latest = 0
-    private var _hasLatest = false
+    fileprivate var _stopped = false
+    fileprivate var _latest = 0
+    fileprivate var _hasLatest = false
     
-    override init(observer: O) {
-        super.init(observer: observer)
+    override init(observer: O, cancel: Cancelable) {
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func run(source: Observable<SourceType>) -> Disposable {
+    func run(_ source: Observable<SourceType>) -> Disposable {
         let subscription = source.subscribe(self)
-        _subscriptions.disposable = subscription
-        return StableCompositeDisposable.create(_subscriptions, _innerSubscription)
+        _subscriptions.setDisposable(subscription)
+        return Disposables.create(_subscriptions, _innerSubscription)
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func performMap(element: SourceType) throws -> S {
+    func performMap(_ element: SourceType) throws -> S {
         abstractMethod()
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         switch event {
-        case .Next(let element):
+        case .next(let element):
             do {
                 let observable = try performMap(element).asObservable()
                 _hasLatest = true
@@ -57,38 +57,38 @@ class SwitchSink<SourceType, S: ObservableConvertibleType, O: ObserverType where
                    
                 let observer = SwitchSinkIter(parent: self, id: latest, _self: d)
                 let disposable = observable.subscribe(observer)
-                d.disposable = disposable
+                d.setDisposable(disposable)
             }
             catch let error {
-                forwardOn(.Error(error))
+                forwardOn(.error(error))
                 dispose()
             }
-        case .Error(let error):
-            forwardOn(.Error(error))
+        case .error(let error):
+            forwardOn(.error(error))
             dispose()
-        case .Completed:
+        case .completed:
             _stopped = true
             
             _subscriptions.dispose()
             
             if !_hasLatest {
-                forwardOn(.Completed)
+                forwardOn(.completed)
                 dispose()
             }
         }
     }
 }
 
-class SwitchSinkIter<SourceType, S: ObservableConvertibleType, O: ObserverType where S.E == O.E>
+class SwitchSinkIter<SourceType, S: ObservableConvertibleType, O: ObserverType>
     : ObserverType
     , LockOwnerType
-    , SynchronizedOnType {
+    , SynchronizedOnType where S.E == O.E {
     typealias E = S.E
     typealias Parent = SwitchSink<SourceType, S, O>
     
-    private let _parent: Parent
-    private let _id: Int
-    private let _self: Disposable
+    fileprivate let _parent: Parent
+    fileprivate let _id: Int
+    fileprivate let _self: Disposable
 
     var _lock: NSRecursiveLock {
         return _parent._lock
@@ -100,14 +100,14 @@ class SwitchSinkIter<SourceType, S: ObservableConvertibleType, O: ObserverType w
         self._self = _self
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         switch event {
-        case .Next: break
-        case .Error, .Completed:
+        case .next: break
+        case .error, .completed:
             _self.dispose()
         }
         
@@ -116,12 +116,12 @@ class SwitchSinkIter<SourceType, S: ObservableConvertibleType, O: ObserverType w
         }
        
         switch event {
-        case .Next:
+        case .next:
             _parent.forwardOn(event)
-        case .Error:
+        case .error:
             _parent.forwardOn(event)
             _parent.dispose()
-        case .Completed:
+        case .completed:
             _parent._hasLatest = false
             if _parent._stopped {
                 _parent.forwardOn(event)
@@ -133,27 +133,27 @@ class SwitchSinkIter<SourceType, S: ObservableConvertibleType, O: ObserverType w
 
 // MARK: Specializations
 
-final class SwitchIdentitySink<S: ObservableConvertibleType, O: ObserverType where O.E == S.E> : SwitchSink<S, S, O> {
-    override init(observer: O) {
-        super.init(observer: observer)
+final class SwitchIdentitySink<S: ObservableConvertibleType, O: ObserverType> : SwitchSink<S, S, O> where O.E == S.E {
+    override init(observer: O, cancel: Cancelable) {
+        super.init(observer: observer, cancel: cancel)
     }
 
-    override func performMap(element: S) throws -> S {
+    override func performMap(_ element: S) throws -> S {
         return element
     }
 }
 
-final class MapSwitchSink<SourceType, S: ObservableConvertibleType, O: ObserverType where O.E == S.E> : SwitchSink<SourceType, S, O> {
-    typealias Selector = SourceType throws -> S
+final class MapSwitchSink<SourceType, S: ObservableConvertibleType, O: ObserverType> : SwitchSink<SourceType, S, O> where O.E == S.E {
+    typealias Selector = (SourceType) throws -> S
 
-    private let _selector: Selector
+    fileprivate let _selector: Selector
 
-    init(selector: Selector, observer: O) {
+    init(selector: @escaping Selector, observer: O, cancel: Cancelable) {
         _selector = selector
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
 
-    override func performMap(element: SourceType) throws -> S {
+    override func performMap(_ element: SourceType) throws -> S {
         return try _selector(element)
     }
 }
@@ -161,33 +161,33 @@ final class MapSwitchSink<SourceType, S: ObservableConvertibleType, O: ObserverT
 // MARK: Producers
 
 final class Switch<S: ObservableConvertibleType> : Producer<S.E> {
-    private let _source: Observable<S>
+    fileprivate let _source: Observable<S>
     
     init(source: Observable<S>) {
         _source = source
     }
     
-    override func run<O : ObserverType where O.E == S.E>(observer: O) -> Disposable {
-        let sink = SwitchIdentitySink<S, O>(observer: observer)
-        sink.disposable = sink.run(_source)
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == S.E {
+        let sink = SwitchIdentitySink<S, O>(observer: observer, cancel: cancel)
+        let subscription = sink.run(_source)
+        return (sink: sink, subscription: subscription)
     }
 }
 
 final class FlatMapLatest<SourceType, S: ObservableConvertibleType> : Producer<S.E> {
-    typealias Selector = SourceType throws -> S
+    typealias Selector = (SourceType) throws -> S
 
-    private let _source: Observable<SourceType>
-    private let _selector: Selector
+    fileprivate let _source: Observable<SourceType>
+    fileprivate let _selector: Selector
 
-    init(source: Observable<SourceType>, selector: Selector) {
+    init(source: Observable<SourceType>, selector: @escaping Selector) {
         _source = source
         _selector = selector
     }
 
-    override func run<O : ObserverType where O.E == S.E>(observer: O) -> Disposable {
-        let sink = MapSwitchSink<SourceType, S, O>(selector: _selector, observer: observer)
-        sink.disposable = sink.run(_source)
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == S.E {
+        let sink = MapSwitchSink<SourceType, S, O>(selector: _selector, observer: observer, cancel: cancel)
+        let subscription = sink.run(_source)
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Take.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Take.swift
index 10d1b30..d1c1e18 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Take.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Take.swift
@@ -10,7 +10,7 @@ import Foundation
 
 // count version
 
-class TakeCountSink<ElementType, O: ObserverType where O.E == ElementType> : Sink<O>, ObserverType {
+class TakeCountSink<ElementType, O: ObserverType> : Sink<O>, ObserverType where O.E == ElementType {
     typealias Parent = TakeCount<ElementType>
     typealias E = ElementType
     
@@ -18,30 +18,30 @@ class TakeCountSink<ElementType, O: ObserverType where O.E == ElementType> : Sin
     
     private var _remaining: Int
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
         _remaining = parent._count
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             
             if _remaining > 0 {
                 _remaining -= 1
                 
-                forwardOn(.Next(value))
+                forwardOn(.next(value))
             
                 if _remaining == 0 {
-                    forwardOn(.Completed)
+                    forwardOn(.completed)
                     dispose()
                 }
             }
-        case .Error:
+        case .error:
             forwardOn(event)
             dispose()
-        case .Completed:
+        case .completed:
             forwardOn(event)
             dispose()
         }
@@ -50,8 +50,8 @@ class TakeCountSink<ElementType, O: ObserverType where O.E == ElementType> : Sin
 }
 
 class TakeCount<Element>: Producer<Element> {
-    private let _source: Observable<Element>
-    private let _count: Int
+    fileprivate let _source: Observable<Element>
+    fileprivate let _count: Int
     
     init(source: Observable<Element>, count: Int) {
         if count < 0 {
@@ -61,44 +61,44 @@ class TakeCount<Element>: Producer<Element> {
         _count = count
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = TakeCountSink(parent: self, observer: observer)
-        sink.disposable = _source.subscribe(sink)
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = TakeCountSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = _source.subscribe(sink)
+        return (sink: sink, subscription: subscription)
     }
 }
 
 // time version
 
-class TakeTimeSink<ElementType, O: ObserverType where O.E == ElementType>
+class TakeTimeSink<ElementType, O: ObserverType>
     : Sink<O>
     , LockOwnerType
     , ObserverType
-    , SynchronizedOnType {
+    , SynchronizedOnType where O.E == ElementType {
     typealias Parent = TakeTime<ElementType>
     typealias E = ElementType
 
-    private let _parent: Parent
+    fileprivate let _parent: Parent
     
     let _lock = NSRecursiveLock()
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         switch event {
-        case .Next(let value):
-            forwardOn(.Next(value))
-        case .Error:
+        case .next(let value):
+            forwardOn(.next(value))
+        case .error:
             forwardOn(event)
             dispose()
-        case .Completed:
+        case .completed:
             forwardOn(event)
             dispose()
         }
@@ -107,28 +107,28 @@ class TakeTimeSink<ElementType, O: ObserverType where O.E == ElementType>
     func tick() {
         _lock.lock(); defer { _lock.unlock() }
 
-        forwardOn(.Completed)
+        forwardOn(.completed)
         dispose()
     }
     
     func run() -> Disposable {
         let disposeTimer = _parent._scheduler.scheduleRelative((), dueTime: _parent._duration) {
             self.tick()
-            return NopDisposable.instance
+            return Disposables.create()
         }
         
         let disposeSubscription = _parent._source.subscribe(self)
         
-        return BinaryDisposable(disposeTimer, disposeSubscription)
+        return Disposables.create(disposeTimer, disposeSubscription)
     }
 }
 
 class TakeTime<Element> : Producer<Element> {
     typealias TimeInterval = RxTimeInterval
     
-    private let _source: Observable<Element>
-    private let _duration: TimeInterval
-    private let _scheduler: SchedulerType
+    fileprivate let _source: Observable<Element>
+    fileprivate let _duration: TimeInterval
+    fileprivate let _scheduler: SchedulerType
     
     init(source: Observable<Element>, duration: TimeInterval, scheduler: SchedulerType) {
         _source = source
@@ -136,9 +136,9 @@ class TakeTime<Element> : Producer<Element> {
         _duration = duration
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = TakeTimeSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = TakeTimeSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/TakeLast.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/TakeLast.swift
index c5dd8a9..7a41479 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/TakeLast.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/TakeLast.swift
@@ -1,6 +1,6 @@
 //
 //  TakeLast.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Tomi Koskinen on 25/10/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,7 +9,7 @@
 import Foundation
 
 
-class TakeLastSink<ElementType, O: ObserverType where O.E == ElementType> : Sink<O>, ObserverType {
+class TakeLastSink<ElementType, O: ObserverType> : Sink<O>, ObserverType where O.E == ElementType {
     typealias Parent = TakeLast<ElementType>
     typealias E = ElementType
     
@@ -17,35 +17,35 @@ class TakeLastSink<ElementType, O: ObserverType where O.E == ElementType> : Sink
     
     private var _elements: Queue<ElementType>
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
         _elements = Queue<ElementType>(capacity: parent._count + 1)
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             _elements.enqueue(value)
             if _elements.count > self._parent._count {
-                _elements.dequeue()
+                let _ = _elements.dequeue()
             }
-        case .Error:
+        case .error:
             forwardOn(event)
             dispose()
-        case .Completed:
+        case .completed:
             for e in _elements {
-                forwardOn(.Next(e))
+                forwardOn(.next(e))
             }
-            forwardOn(.Completed)
+            forwardOn(.completed)
             dispose()
         }
     }
 }
 
 class TakeLast<Element>: Producer<Element> {
-    private let _source: Observable<Element>
-    private let _count: Int
+    fileprivate let _source: Observable<Element>
+    fileprivate let _count: Int
     
     init(source: Observable<Element>, count: Int) {
         if count < 0 {
@@ -55,9 +55,9 @@ class TakeLast<Element>: Producer<Element> {
         _count = count
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = TakeLastSink(parent: self, observer: observer)
-        sink.disposable = _source.subscribe(sink)
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = TakeLastSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = _source.subscribe(sink)
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/TakeUntil.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/TakeUntil.swift
index c806e23..0769e8a 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/TakeUntil.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/TakeUntil.swift
@@ -8,41 +8,41 @@
 
 import Foundation
 
-class TakeUntilSinkOther<ElementType, Other, O: ObserverType where O.E == ElementType>
+class TakeUntilSinkOther<ElementType, Other, O: ObserverType>
     : ObserverType
     , LockOwnerType
-    , SynchronizedOnType {
+    , SynchronizedOnType where O.E == ElementType {
     typealias Parent = TakeUntilSink<ElementType, Other, O>
     typealias E = Other
     
-    private let _parent: Parent
+    fileprivate let _parent: Parent
 
     var _lock: NSRecursiveLock {
         return _parent._lock
     }
     
-    private let _subscription = SingleAssignmentDisposable()
+    fileprivate let _subscription = SingleAssignmentDisposable()
     
     init(parent: Parent) {
         _parent = parent
 #if TRACE_RESOURCES
-        AtomicIncrement(&resourceCount)
+        let _ = Resources.incrementTotal()
 #endif
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         switch event {
-        case .Next:
-            _parent.forwardOn(.Completed)
+        case .next:
+            _parent.forwardOn(.completed)
             _parent.dispose()
-        case .Error(let e):
-            _parent.forwardOn(.Error(e))
+        case .error(let e):
+            _parent.forwardOn(.error(e))
             _parent.dispose()
-        case .Completed:
+        case .completed:
             _parent._open = true
             _subscription.dispose()
         }
@@ -50,43 +50,43 @@ class TakeUntilSinkOther<ElementType, Other, O: ObserverType where O.E == Elemen
     
 #if TRACE_RESOURCES
     deinit {
-        AtomicDecrement(&resourceCount)
+        let _ = Resources.decrementTotal()
     }
 #endif
 }
 
-class TakeUntilSink<ElementType, Other, O: ObserverType where O.E == ElementType>
+class TakeUntilSink<ElementType, Other, O: ObserverType>
     : Sink<O>
     , LockOwnerType
     , ObserverType
-    , SynchronizedOnType {
+    , SynchronizedOnType where O.E == ElementType {
     typealias E = ElementType
     typealias Parent = TakeUntil<E, Other>
     
-    private let _parent: Parent
+    fileprivate let _parent: Parent
  
     let _lock = NSRecursiveLock()
     
     // state
-    private var _open = false
+    fileprivate var _open = false
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         switch event {
-        case .Next:
+        case .next:
             forwardOn(event)
-        case .Error:
+        case .error:
             forwardOn(event)
             dispose()
-        case .Completed:
+        case .completed:
             forwardOn(event)
             dispose()
         }
@@ -95,26 +95,26 @@ class TakeUntilSink<ElementType, Other, O: ObserverType where O.E == ElementType
     func run() -> Disposable {
         let otherObserver = TakeUntilSinkOther(parent: self)
         let otherSubscription = _parent._other.subscribe(otherObserver)
-        otherObserver._subscription.disposable = otherSubscription
+        otherObserver._subscription.setDisposable(otherSubscription)
         let sourceSubscription = _parent._source.subscribe(self)
         
-        return StableCompositeDisposable.create(sourceSubscription, otherObserver._subscription)
+        return Disposables.create(sourceSubscription, otherObserver._subscription)
     }
 }
 
 class TakeUntil<Element, Other>: Producer<Element> {
     
-    private let _source: Observable<Element>
-    private let _other: Observable<Other>
+    fileprivate let _source: Observable<Element>
+    fileprivate let _other: Observable<Other>
     
     init(source: Observable<Element>, other: Observable<Other>) {
         _source = source
         _other = other
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = TakeUntilSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = TakeUntilSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/TakeWhile.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/TakeWhile.swift
index 7db0752..259bc25 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/TakeWhile.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/TakeWhile.swift
@@ -8,24 +8,24 @@
 
 import Foundation
 
-class TakeWhileSink<ElementType, O: ObserverType where O.E == ElementType>
+class TakeWhileSink<ElementType, O: ObserverType>
     : Sink<O>
-    , ObserverType {
+    , ObserverType where O.E == ElementType {
     typealias Parent = TakeWhile<ElementType>
     typealias Element = ElementType
 
-    private let _parent: Parent
+    fileprivate let _parent: Parent
 
-    private var _running = true
+    fileprivate var _running = true
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             if !_running {
                 return
             }
@@ -33,18 +33,18 @@ class TakeWhileSink<ElementType, O: ObserverType where O.E == ElementType>
             do {
                 _running = try _parent._predicate(value)
             } catch let e {
-                forwardOn(.Error(e))
+                forwardOn(.error(e))
                 dispose()
                 return
             }
             
             if _running {
-                forwardOn(.Next(value))
+                forwardOn(.next(value))
             } else {
-                forwardOn(.Completed)
+                forwardOn(.completed)
                 dispose()
             }
-        case .Error, .Completed:
+        case .error, .completed:
             forwardOn(event)
             dispose()
         }
@@ -52,45 +52,45 @@ class TakeWhileSink<ElementType, O: ObserverType where O.E == ElementType>
     
 }
 
-class TakeWhileSinkWithIndex<ElementType, O: ObserverType where O.E == ElementType>
+class TakeWhileSinkWithIndex<ElementType, O: ObserverType>
     : Sink<O>
-    , ObserverType {
+    , ObserverType where O.E == ElementType {
     typealias Parent = TakeWhile<ElementType>
     typealias Element = ElementType
     
-    private let _parent: Parent
+    fileprivate let _parent: Parent
     
-    private var _running = true
-    private var _index = 0
+    fileprivate var _running = true
+    fileprivate var _index = 0
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             if !_running {
                 return
             }
             
             do {
                 _running = try _parent._predicateWithIndex(value, _index)
-                try incrementChecked(&_index)
+                let _ = try incrementChecked(&_index)
             } catch let e {
-                forwardOn(.Error(e))
+                forwardOn(.error(e))
                 dispose()
                 return
             }
             
             if _running {
-                forwardOn(.Next(value))
+                forwardOn(.next(value))
             } else {
-                forwardOn(.Completed)
+                forwardOn(.completed)
                 dispose()
             }
-        case .Error, .Completed:
+        case .error, .completed:
             forwardOn(event)
             dispose()
         }
@@ -102,31 +102,31 @@ class TakeWhile<Element>: Producer<Element> {
     typealias Predicate = (Element) throws -> Bool
     typealias PredicateWithIndex = (Element, Int) throws -> Bool
 
-    private let _source: Observable<Element>
-    private let _predicate: Predicate!
-    private let _predicateWithIndex: PredicateWithIndex!
+    fileprivate let _source: Observable<Element>
+    fileprivate let _predicate: Predicate!
+    fileprivate let _predicateWithIndex: PredicateWithIndex!
 
-    init(source: Observable<Element>, predicate: Predicate) {
+    init(source: Observable<Element>, predicate: @escaping Predicate) {
         _source = source
         _predicate = predicate
         _predicateWithIndex = nil
     }
     
-    init(source: Observable<Element>, predicate: PredicateWithIndex) {
+    init(source: Observable<Element>, predicate: @escaping PredicateWithIndex) {
         _source = source
         _predicate = nil
         _predicateWithIndex = predicate
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
         if let _ = _predicate {
-            let sink = TakeWhileSink(parent: self, observer: observer)
-            sink.disposable = _source.subscribe(sink)
-            return sink
+            let sink = TakeWhileSink(parent: self, observer: observer, cancel: cancel)
+            let subscription = _source.subscribe(sink)
+            return (sink: sink, subscription: subscription)
         } else {
-            let sink = TakeWhileSinkWithIndex(parent: self, observer: observer)
-            sink.disposable = _source.subscribe(sink)
-            return sink
+            let sink = TakeWhileSinkWithIndex(parent: self, observer: observer, cancel: cancel)
+            let subscription = _source.subscribe(sink)
+            return (sink: sink, subscription: subscription)
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Throttle.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Throttle.swift
index b0db576..f9683fe 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Throttle.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Throttle.swift
@@ -1,6 +1,6 @@
 //
 //  Throttle.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/22/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -21,84 +21,123 @@ class ThrottleSink<O: ObserverType>
     let _lock = NSRecursiveLock()
     
     // state
-    private var _id = 0 as UInt64
-    private var _value: Element? = nil
-    
+    private var _lastUnsentElement: Element? = nil
+    private var _lastSentTime: Date? = nil
+    private var _completed: Bool = false
+
     let cancellable = SerialDisposable()
     
-    init(parent: ParentType, observer: O) {
+    init(parent: ParentType, observer: O, cancel: Cancelable) {
         _parent = parent
         
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
         let subscription = _parent._source.subscribe(self)
         
-        return StableCompositeDisposable.create(subscription, cancellable)
+        return Disposables.create(subscription, cancellable)
     }
 
-    func on(event: Event<Element>) {
+    func on(_ event: Event<Element>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<Element>) {
+    func _synchronized_on(_ event: Event<Element>) {
         switch event {
-        case .Next(let element):
-            _id = _id &+ 1
-            let currentId = _id
-            _value = element
+        case .next(let element):
+            let now = _parent._scheduler.now
+
+            let timeIntervalSinceLast: RxTimeInterval
+
+            if let lastSendingTime = _lastSentTime {
+                timeIntervalSinceLast = now.timeIntervalSince(lastSendingTime)
+            }
+            else {
+                timeIntervalSinceLast = _parent._dueTime
+            }
 
+            let couldSendNow = timeIntervalSinceLast >= _parent._dueTime
+
+            if couldSendNow {
+                self.sendNow(element: element)
+                return
+            }
+
+            if !_parent._latest {
+                return
+            }
+
+            let isThereAlreadyInFlightRequest = _lastUnsentElement != nil
             
+            _lastUnsentElement = element
+
+            if isThereAlreadyInFlightRequest {
+                return
+            }
+
             let scheduler = _parent._scheduler
             let dueTime = _parent._dueTime
 
             let d = SingleAssignmentDisposable()
             self.cancellable.disposable = d
-            d.disposable = scheduler.scheduleRelative(currentId, dueTime: dueTime, action: self.propagate)
-        case .Error:
-            _value = nil
+
+            d.setDisposable(scheduler.scheduleRelative(0, dueTime: dueTime - timeIntervalSinceLast, action: self.propagate))
+        case .error:
+            _lastUnsentElement = nil
             forwardOn(event)
             dispose()
-        case .Completed:
-            if let value = _value {
-                _value = nil
-                forwardOn(.Next(value))
+        case .completed:
+            if let _ = _lastUnsentElement {
+                _completed = true
+            }
+            else {
+                forwardOn(.completed)
+                dispose()
             }
-            forwardOn(.Completed)
-            dispose()
         }
     }
+
+    private func sendNow(element: Element) {
+        _lastUnsentElement = nil
+        self.forwardOn(.next(element))
+        // in case element processing takes a while, this should give some more room
+        _lastSentTime = _parent._scheduler.now
+    }
     
-    func propagate(currentId: UInt64) -> Disposable {
+    func propagate(_: Int) -> Disposable {
         _lock.lock(); defer { _lock.unlock() } // {
-            let originalValue = _value
+            if let lastUnsentElement = _lastUnsentElement {
+                sendNow(element: lastUnsentElement)
+            }
 
-            if let value = originalValue where _id == currentId {
-                _value = nil
-                forwardOn(.Next(value))
+            if _completed {
+                forwardOn(.completed)
+                dispose()
             }
         // }
-        return NopDisposable.instance
+        return Disposables.create()
     }
 }
 
 class Throttle<Element> : Producer<Element> {
     
-    private let _source: Observable<Element>
-    private let _dueTime: RxTimeInterval
-    private let _scheduler: SchedulerType
-    
-    init(source: Observable<Element>, dueTime: RxTimeInterval, scheduler: SchedulerType) {
+    fileprivate let _source: Observable<Element>
+    fileprivate let _dueTime: RxTimeInterval
+    fileprivate let _latest: Bool
+    fileprivate let _scheduler: SchedulerType
+
+    init(source: Observable<Element>, dueTime: RxTimeInterval, latest: Bool, scheduler: SchedulerType) {
         _source = source
         _dueTime = dueTime
+        _latest = latest
         _scheduler = scheduler
     }
     
-    override func run<O: ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = ThrottleSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = ThrottleSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
     
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Timeout.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Timeout.swift
index db210ca..f354ccf 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Timeout.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Timeout.swift
@@ -1,6 +1,6 @@
 //
 //  Timeout.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Tomi Koskinen on 13/11/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,7 +8,7 @@
 
 import Foundation
 
-class TimeoutSink<ElementType, O: ObserverType where O.E == ElementType>: Sink<O>, LockOwnerType, ObserverType {
+class TimeoutSink<ElementType, O: ObserverType>: Sink<O>, LockOwnerType, ObserverType where O.E == ElementType {
     typealias E = ElementType
     typealias Parent = Timeout<E>
     
@@ -22,9 +22,9 @@ class TimeoutSink<ElementType, O: ObserverType where O.E == ElementType>: Sink<O
     private var _id = 0
     private var _switched = false
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
@@ -33,14 +33,14 @@ class TimeoutSink<ElementType, O: ObserverType where O.E == ElementType>: Sink<O
         
         _createTimeoutTimer()
         
-        original.disposable = _parent._source.subscribeSafe(self)
+        original.setDisposable(_parent._source.subscribeSafe(self))
         
-        return StableCompositeDisposable.create(_subscription, _timerD)
+        return Disposables.create(_subscription, _timerD)
     }
 
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         switch event {
-        case .Next:
+        case .next:
             var onNextWins = false
             
             _lock.performLocked() {
@@ -54,7 +54,7 @@ class TimeoutSink<ElementType, O: ObserverType where O.E == ElementType>: Sink<O
                 forwardOn(event)
                 self._createTimeoutTimer()
             }
-        case .Error, .Completed:
+        case .error, .completed:
             var onEventWins = false
             
             _lock.performLocked() {
@@ -72,14 +72,14 @@ class TimeoutSink<ElementType, O: ObserverType where O.E == ElementType>: Sink<O
     }
     
     private func _createTimeoutTimer() {
-        if _timerD.disposed {
+        if _timerD.isDisposed {
             return
         }
         
         let nextTimer = SingleAssignmentDisposable()
         _timerD.disposable = nextTimer
         
-        nextTimer.disposable = _parent._scheduler.scheduleRelative(_id, dueTime: _parent._dueTime) { state in
+        let disposeSchedule = _parent._scheduler.scheduleRelative(_id, dueTime: _parent._dueTime) { state in
             
             var timerWins = false
             
@@ -92,18 +92,20 @@ class TimeoutSink<ElementType, O: ObserverType where O.E == ElementType>: Sink<O
                 self._subscription.disposable = self._parent._other.subscribeSafe(self.forwarder())
             }
             
-            return NopDisposable.instance
+            return Disposables.create()
         }
+
+        nextTimer.setDisposable(disposeSchedule)
     }
 }
 
 
 class Timeout<Element> : Producer<Element> {
     
-    private let _source: Observable<Element>
-    private let _dueTime: RxTimeInterval
-    private let _other: Observable<Element>
-    private let _scheduler: SchedulerType
+    fileprivate let _source: Observable<Element>
+    fileprivate let _dueTime: RxTimeInterval
+    fileprivate let _other: Observable<Element>
+    fileprivate let _scheduler: SchedulerType
     
     init(source: Observable<Element>, dueTime: RxTimeInterval, other: Observable<Element>, scheduler: SchedulerType) {
         _source = source
@@ -112,9 +114,9 @@ class Timeout<Element> : Producer<Element> {
         _scheduler = scheduler
     }
     
-    override func run<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
-        let sink = TimeoutSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Element {
+        let sink = TimeoutSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Timer.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Timer.swift
index a395bad..7c2df2c 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Timer.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Timer.swift
@@ -8,48 +8,48 @@
 
 import Foundation
 
-class TimerSink<O: ObserverType where O.E : SignedIntegerType > : Sink<O> {
+class TimerSink<O: ObserverType> : Sink<O> where O.E : SignedInteger  {
     typealias Parent = Timer<O.E>
     
     private let _parent: Parent
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
         return _parent._scheduler.schedulePeriodic(0 as O.E, startAfter: _parent._dueTime, period: _parent._period!) { state in
-            self.forwardOn(.Next(state))
+            self.forwardOn(.next(state))
             return state &+ 1
         }
     }
 }
 
-class TimerOneOffSink<O: ObserverType where O.E : SignedIntegerType> : Sink<O> {
+class TimerOneOffSink<O: ObserverType> : Sink<O> where O.E : SignedInteger {
     typealias Parent = Timer<O.E>
     
     private let _parent: Parent
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
         return _parent._scheduler.scheduleRelative((), dueTime: _parent._dueTime) { (_) -> Disposable in
-            self.forwardOn(.Next(0))
-            self.forwardOn(.Completed)
+            self.forwardOn(.next(0))
+            self.forwardOn(.completed)
             
-            return NopDisposable.instance
+            return Disposables.create()
         }
     }
 }
 
-class Timer<E: SignedIntegerType>: Producer<E> {
-    private let _scheduler: SchedulerType
-    private let _dueTime: RxTimeInterval
-    private let _period: RxTimeInterval?
+class Timer<E: SignedInteger>: Producer<E> {
+    fileprivate let _scheduler: SchedulerType
+    fileprivate let _dueTime: RxTimeInterval
+    fileprivate let _period: RxTimeInterval?
     
     init(dueTime: RxTimeInterval, period: RxTimeInterval?, scheduler: SchedulerType) {
         _scheduler = scheduler
@@ -57,16 +57,16 @@ class Timer<E: SignedIntegerType>: Producer<E> {
         _period = period
     }
     
-    override func run<O : ObserverType where O.E == E>(observer: O) -> Disposable {
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == E {
         if let _ = _period {
-            let sink = TimerSink(parent: self, observer: observer)
-            sink.disposable = sink.run()
-            return sink
+            let sink = TimerSink(parent: self, observer: observer, cancel: cancel)
+            let subscription = sink.run()
+            return (sink: sink, subscription: subscription)
         }
         else {
-            let sink = TimerOneOffSink(parent: self, observer: observer)
-            sink.disposable = sink.run()
-            return sink
+            let sink = TimerOneOffSink(parent: self, observer: observer, cancel: cancel)
+            let subscription = sink.run()
+            return (sink: sink, subscription: subscription)
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ToArray.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ToArray.swift
index bac43db..623d6e2 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ToArray.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/ToArray.swift
@@ -1,6 +1,6 @@
 //
 //  ToArray.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Junior B. on 20/10/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,28 +8,28 @@
 
 import Foundation
 
-class ToArraySink<SourceType, O: ObserverType where O.E == [SourceType]> : Sink<O>, ObserverType {
+class ToArraySink<SourceType, O: ObserverType> : Sink<O>, ObserverType where O.E == [SourceType] {
     typealias Parent = ToArray<SourceType>
     
     let _parent: Parent
     var _list = Array<SourceType>()
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
         
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<SourceType>) {
+    func on(_ event: Event<SourceType>) {
         switch event {
-        case .Next(let value):
+        case .next(let value):
             self._list.append(value)
-        case .Error(let e):
-            forwardOn(.Error(e))
+        case .error(let e):
+            forwardOn(.error(e))
             self.dispose()
-        case .Completed:
-            forwardOn(.Next(_list))
-            forwardOn(.Completed)
+        case .completed:
+            forwardOn(.next(_list))
+            forwardOn(.completed)
             self.dispose()
         }
     }
@@ -42,9 +42,9 @@ class ToArray<SourceType> : Producer<[SourceType]> {
         _source = source
     }
     
-    override func run<O: ObserverType where O.E == [SourceType]>(observer: O) -> Disposable {
-        let sink = ToArraySink(parent: self, observer: observer)
-        sink.disposable = _source.subscribe(sink)
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == [SourceType] {
+        let sink = ToArraySink(parent: self, observer: observer, cancel: cancel)
+        let subscription = _source.subscribe(sink)
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Using.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Using.swift
index 84e7633..f0a860a 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Using.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Using.swift
@@ -1,6 +1,6 @@
 //
 //  Using.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Yury Korolev on 10/15/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,47 +8,47 @@
 
 import Foundation
 
-class UsingSink<SourceType, ResourceType: Disposable, O: ObserverType where O.E == SourceType> : Sink<O>, ObserverType {
+class UsingSink<SourceType, ResourceType: Disposable, O: ObserverType> : Sink<O>, ObserverType where O.E == SourceType {
 
     typealias Parent = Using<SourceType, ResourceType>
     typealias E = O.E
 
     private let _parent: Parent
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
-        var disposable = NopDisposable.instance
+        var disposable = Disposables.create()
         
         do {
             let resource = try _parent._resourceFactory()
             disposable = resource
             let source = try _parent._observableFactory(resource)
             
-            return StableCompositeDisposable.create(
+            return Disposables.create(
                 source.subscribe(self),
                 disposable
             )
         } catch let error {
-            return StableCompositeDisposable.create(
+            return Disposables.create(
                 Observable.error(error).subscribe(self),
                 disposable
             )
         }
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         switch event {
-        case let .Next(value):
-            forwardOn(.Next(value))
-        case let .Error(error):
-            forwardOn(.Error(error))
+        case let .next(value):
+            forwardOn(.next(value))
+        case let .error(error):
+            forwardOn(.error(error))
             dispose()
-        case .Completed:
-            forwardOn(.Completed)
+        case .completed:
+            forwardOn(.completed)
             dispose()
         }
     }
@@ -59,20 +59,20 @@ class Using<SourceType, ResourceType: Disposable>: Producer<SourceType> {
     typealias E = SourceType
     
     typealias ResourceFactory = () throws -> ResourceType
-    typealias ObservableFactory = ResourceType throws -> Observable<SourceType>
+    typealias ObservableFactory = (ResourceType) throws -> Observable<SourceType>
     
-    private let _resourceFactory: ResourceFactory
-    private let _observableFactory: ObservableFactory
+    fileprivate let _resourceFactory: ResourceFactory
+    fileprivate let _observableFactory: ObservableFactory
     
     
-    init(resourceFactory: ResourceFactory, observableFactory: ObservableFactory) {
+    init(resourceFactory: @escaping ResourceFactory, observableFactory: @escaping ObservableFactory) {
         _resourceFactory = resourceFactory
         _observableFactory = observableFactory
     }
     
-    override func run<O : ObserverType where O.E == E>(observer: O) -> Disposable {
-        let sink = UsingSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == E {
+        let sink = UsingSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Window.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Window.swift
index 7001338..4ca7ac4 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Window.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Window.swift
@@ -1,6 +1,6 @@
 //
 //  Window.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Junior B. on 29/10/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,11 +8,11 @@
 
 import Foundation
 
-class WindowTimeCountSink<Element, O: ObserverType where O.E == Observable<Element>>
+class WindowTimeCountSink<Element, O: ObserverType>
     : Sink<O>
     , ObserverType
     , LockOwnerType
-    , SynchronizedOnType {
+    , SynchronizedOnType where O.E == Observable<Element> {
     typealias Parent = WindowTimeCount<Element>
     typealias E = Element
     
@@ -28,47 +28,47 @@ class WindowTimeCountSink<Element, O: ObserverType where O.E == Observable<Eleme
     private let _refCountDisposable: RefCountDisposable
     private let _groupDisposable = CompositeDisposable()
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
         
-        _groupDisposable.addDisposable(_timerD)
+        let _ = _groupDisposable.insert(_timerD)
         
         _refCountDisposable = RefCountDisposable(disposable: _groupDisposable)
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
         
-        forwardOn(.Next(AddRef(source: _subject, refCount: _refCountDisposable).asObservable()))
+        forwardOn(.next(AddRef(source: _subject, refCount: _refCountDisposable).asObservable()))
         createTimer(_windowId)
         
-        _groupDisposable.addDisposable(_parent._source.subscribeSafe(self))
+        let _ = _groupDisposable.insert(_parent._source.subscribeSafe(self))
         return _refCountDisposable
     }
     
     func startNewWindowAndCompleteCurrentOne() {
-        _subject.on(.Completed)
+        _subject.on(.completed)
         _subject = PublishSubject<Element>()
         
-        forwardOn(.Next(AddRef(source: _subject, refCount: _refCountDisposable).asObservable()))
+        forwardOn(.next(AddRef(source: _subject, refCount: _refCountDisposable).asObservable()))
     }
 
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         var newWindow = false
         var newId = 0
         
         switch event {
-        case .Next(let element):
-            _subject.on(.Next(element))
+        case .next(let element):
+            _subject.on(.next(element))
             
             do {
-                try incrementChecked(&_count)
+                let _ = try incrementChecked(&_count)
             } catch (let e) {
-                _subject.on(.Error(e as ErrorType))
+                _subject.on(.error(e as Swift.Error))
                 dispose()
             }
             
@@ -80,13 +80,13 @@ class WindowTimeCountSink<Element, O: ObserverType where O.E == Observable<Eleme
                 self.startNewWindowAndCompleteCurrentOne()
             }
             
-        case .Error(let error):
-            _subject.on(.Error(error))
-            forwardOn(.Error(error))
+        case .error(let error):
+            _subject.on(.error(error))
+            forwardOn(.error(error))
             dispose()
-        case .Completed:
-            _subject.on(.Completed)
-            forwardOn(.Completed)
+        case .completed:
+            _subject.on(.completed)
+            forwardOn(.completed)
             dispose()
         }
 
@@ -95,8 +95,8 @@ class WindowTimeCountSink<Element, O: ObserverType where O.E == Observable<Eleme
         }
     }
     
-    func createTimer(windowId: Int) {
-        if _timerD.disposed {
+    func createTimer(_ windowId: Int) {
+        if _timerD.isDisposed {
             return
         }
         
@@ -108,7 +108,7 @@ class WindowTimeCountSink<Element, O: ObserverType where O.E == Observable<Eleme
 
         _timerD.disposable = nextTimer
 
-        nextTimer.disposable = _parent._scheduler.scheduleRelative(windowId, dueTime: _parent._timeSpan) { previousWindowId in
+        let scheduledRelative = _parent._scheduler.scheduleRelative(windowId, dueTime: _parent._timeSpan) { previousWindowId in
             
             var newId = 0
             
@@ -125,17 +125,19 @@ class WindowTimeCountSink<Element, O: ObserverType where O.E == Observable<Eleme
             
             self.createTimer(newId)
             
-            return NopDisposable.instance
+            return Disposables.create()
         }
+
+        nextTimer.setDisposable(scheduledRelative)
     }
 }
 
 class WindowTimeCount<Element> : Producer<Observable<Element>> {
     
-    private let _timeSpan: RxTimeInterval
-    private let _count: Int
-    private let _scheduler: SchedulerType
-    private let _source: Observable<Element>
+    fileprivate let _timeSpan: RxTimeInterval
+    fileprivate let _count: Int
+    fileprivate let _scheduler: SchedulerType
+    fileprivate let _source: Observable<Element>
     
     init(source: Observable<Element>, timeSpan: RxTimeInterval, count: Int, scheduler: SchedulerType) {
         _source = source
@@ -144,9 +146,9 @@ class WindowTimeCount<Element> : Producer<Observable<Element>> {
         _scheduler = scheduler
     }
     
-    override func run<O : ObserverType where O.E == Observable<Element>>(observer: O) -> Disposable {
-        let sink = WindowTimeCountSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == Observable<Element> {
+        let sink = WindowTimeCountSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/WithLatestFrom.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/WithLatestFrom.swift
index 0ac25f7..53cf2d9 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/WithLatestFrom.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/WithLatestFrom.swift
@@ -1,6 +1,6 @@
 //
 //  WithLatestFrom.swift
-//  RxExample
+//  RxSwift
 //
 //  Created by Yury Korolev on 10/19/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,66 +8,66 @@
 
 import Foundation
 
-class WithLatestFromSink<FirstType, SecondType, ResultType, O: ObserverType where O.E == ResultType>
+class WithLatestFromSink<FirstType, SecondType, ResultType, O: ObserverType>
     : Sink<O>
     , ObserverType
     , LockOwnerType
-    , SynchronizedOnType {
+    , SynchronizedOnType where O.E == ResultType {
 
     typealias Parent = WithLatestFrom<FirstType, SecondType, ResultType>
     typealias E = FirstType
     
-    private let _parent: Parent
+    fileprivate let _parent: Parent
     
     var _lock = NSRecursiveLock()
-    private var _latest: SecondType?
+    fileprivate var _latest: SecondType?
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
         
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
     func run() -> Disposable {
         let sndSubscription = SingleAssignmentDisposable()
         let sndO = WithLatestFromSecond(parent: self, disposable: sndSubscription)
         
-        sndSubscription.disposable = _parent._second.subscribe(sndO)
+        sndSubscription.setDisposable(_parent._second.subscribe(sndO))
         let fstSubscription = _parent._first.subscribe(self)
-        
-        return StableCompositeDisposable.create(fstSubscription, sndSubscription)
+
+        return Disposables.create(fstSubscription, sndSubscription)
     }
 
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         switch event {
-        case let .Next(value):
+        case let .next(value):
             guard let latest = _latest else { return }
             do {
                 let res = try _parent._resultSelector(value, latest)
                 
-                forwardOn(.Next(res))
+                forwardOn(.next(res))
             } catch let e {
-                forwardOn(.Error(e))
+                forwardOn(.error(e))
                 dispose()
             }
-        case .Completed:
-            forwardOn(.Completed)
+        case .completed:
+            forwardOn(.completed)
             dispose()
-        case let .Error(error):
-            forwardOn(.Error(error))
+        case let .error(error):
+            forwardOn(.error(error))
             dispose()
         }
     }
 }
 
-class WithLatestFromSecond<FirstType, SecondType, ResultType, O: ObserverType where O.E == ResultType>
+class WithLatestFromSecond<FirstType, SecondType, ResultType, O: ObserverType>
     : ObserverType
     , LockOwnerType
-    , SynchronizedOnType {
+    , SynchronizedOnType where O.E == ResultType {
     
     typealias Parent = WithLatestFromSink<FirstType, SecondType, ResultType, O>
     typealias E = SecondType
@@ -84,18 +84,18 @@ class WithLatestFromSecond<FirstType, SecondType, ResultType, O: ObserverType wh
         _disposable = disposable
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         switch event {
-        case let .Next(value):
+        case let .next(value):
             _parent._latest = value
-        case .Completed:
+        case .completed:
             _disposable.dispose()
-        case let .Error(error):
-            _parent.forwardOn(.Error(error))
+        case let .error(error):
+            _parent.forwardOn(.error(error))
             _parent.dispose()
         }
     }
@@ -104,19 +104,19 @@ class WithLatestFromSecond<FirstType, SecondType, ResultType, O: ObserverType wh
 class WithLatestFrom<FirstType, SecondType, ResultType>: Producer<ResultType> {
     typealias ResultSelector = (FirstType, SecondType) throws -> ResultType
     
-    private let _first: Observable<FirstType>
-    private let _second: Observable<SecondType>
-    private let _resultSelector: ResultSelector
+    fileprivate let _first: Observable<FirstType>
+    fileprivate let _second: Observable<SecondType>
+    fileprivate let _resultSelector: ResultSelector
 
-    init(first: Observable<FirstType>, second: Observable<SecondType>, resultSelector: ResultSelector) {
+    init(first: Observable<FirstType>, second: Observable<SecondType>, resultSelector: @escaping ResultSelector) {
         _first = first
         _second = second
         _resultSelector = resultSelector
     }
     
-    override func run<O : ObserverType where O.E == ResultType>(observer: O) -> Disposable {
-        let sink = WithLatestFromSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == ResultType {
+        let sink = WithLatestFromSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Zip+CollectionType.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Zip+Collection.swift
similarity index 64%
rename from Example/Pods/RxSwift/RxSwift/Observables/Implementations/Zip+CollectionType.swift
rename to Example/Pods/RxSwift/RxSwift/Observables/Implementations/Zip+Collection.swift
index 20d10de..fcd7978 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Zip+CollectionType.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Zip+Collection.swift
@@ -1,6 +1,6 @@
 //
-//  Zip+CollectionType.swift
-//  Rx
+//  Zip+Collection.swift
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 8/30/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,10 +8,10 @@
 
 import Foundation
 
-class ZipCollectionTypeSink<C: CollectionType, R, O: ObserverType where C.Generator.Element : ObservableConvertibleType, O.E == R>
-    : Sink<O> {
+class ZipCollectionTypeSink<C: Collection, R, O: ObserverType>
+    : Sink<O> where C.Iterator.Element : ObservableConvertibleType, O.E == R {
     typealias Parent = ZipCollectionType<C, R>
-    typealias SourceElement = C.Generator.Element.E
+    typealias SourceElement = C.Iterator.Element.E
     
     private let _parent: Parent
     
@@ -24,10 +24,10 @@ class ZipCollectionTypeSink<C: CollectionType, R, O: ObserverType where C.Genera
     private var _numberOfDone = 0
     private var _subscriptions: [SingleAssignmentDisposable]
     
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        _values = [Queue<SourceElement>](count: parent.count, repeatedValue: Queue(capacity: 4))
-        _isDone = [Bool](count: parent.count, repeatedValue: false)
+        _values = [Queue<SourceElement>](repeating: Queue(capacity: 4), count: parent.count)
+        _isDone = [Bool](repeating: false, count: parent.count)
         _subscriptions = Array<SingleAssignmentDisposable>()
         _subscriptions.reserveCapacity(parent.count)
         
@@ -35,13 +35,13 @@ class ZipCollectionTypeSink<C: CollectionType, R, O: ObserverType where C.Genera
             _subscriptions.append(SingleAssignmentDisposable())
         }
         
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
     
-    func on(event: Event<SourceElement>, atIndex: Int) {
+    func on(_ event: Event<SourceElement>, atIndex: Int) {
         _lock.lock(); defer { _lock.unlock() } // {
             switch event {
-            case .Next(let element):
+            case .next(let element):
                 _values[atIndex].enqueue(element)
                 
                 if _values[atIndex].count == 1 {
@@ -51,7 +51,7 @@ class ZipCollectionTypeSink<C: CollectionType, R, O: ObserverType where C.Genera
                 if _numberOfValues < _parent.count {
                     let numberOfOthersThatAreDone = _numberOfDone - (_isDone[atIndex] ? 1 : 0)
                     if numberOfOthersThatAreDone == _parent.count - 1 {
-                        self.forwardOn(.Completed)
+                        self.forwardOn(.completed)
                         self.dispose()
                     }
                     return
@@ -72,17 +72,17 @@ class ZipCollectionTypeSink<C: CollectionType, R, O: ObserverType where C.Genera
                     }
                     
                     let result = try _parent.resultSelector(arguments)
-                    self.forwardOn(.Next(result))
+                    self.forwardOn(.next(result))
                 }
                 catch let error {
-                    self.forwardOn(.Error(error))
+                    self.forwardOn(.error(error))
                     self.dispose()
                 }
                 
-            case .Error(let error):
-                self.forwardOn(.Error(error))
+            case .error(let error):
+                self.forwardOn(.error(error))
                 self.dispose()
-            case .Completed:
+            case .completed:
                 if _isDone[atIndex] {
                     return
                 }
@@ -91,7 +91,7 @@ class ZipCollectionTypeSink<C: CollectionType, R, O: ObserverType where C.Genera
                 _numberOfDone += 1
                 
                 if _numberOfDone == _parent.count {
-                    self.forwardOn(.Completed)
+                    self.forwardOn(.completed)
                     self.dispose()
                 }
                 else {
@@ -103,35 +103,37 @@ class ZipCollectionTypeSink<C: CollectionType, R, O: ObserverType where C.Genera
     
     func run() -> Disposable {
         var j = 0
-        for i in _parent.sources.startIndex ..< _parent.sources.endIndex {
+        for i in _parent.sources {
             let index = j
-            let source = _parent.sources[i].asObservable()
-            _subscriptions[j].disposable = source.subscribe(AnyObserver { event in
+            let source = i.asObservable()
+
+            let disposable = source.subscribe(AnyObserver { event in
                 self.on(event, atIndex: index)
                 })
+            _subscriptions[j].setDisposable(disposable)
             j += 1
         }
         
-        return CompositeDisposable(disposables: _subscriptions.map { $0 })
+        return Disposables.create(_subscriptions)
     }
 }
 
-class ZipCollectionType<C: CollectionType, R where C.Generator.Element : ObservableConvertibleType> : Producer<R> {
-    typealias ResultSelector = [C.Generator.Element.E] throws -> R
+class ZipCollectionType<C: Collection, R> : Producer<R> where C.Iterator.Element : ObservableConvertibleType {
+    typealias ResultSelector = ([C.Iterator.Element.E]) throws -> R
     
     let sources: C
     let resultSelector: ResultSelector
     let count: Int
     
-    init(sources: C, resultSelector: ResultSelector) {
+    init(sources: C, resultSelector: @escaping ResultSelector) {
         self.sources = sources
         self.resultSelector = resultSelector
         self.count = Int(self.sources.count.toIntMax())
     }
     
-    override func run<O : ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = ZipCollectionTypeSink(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O : ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = ZipCollectionTypeSink(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Zip+arity.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Zip+arity.swift
index 36679bf..b74464f 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Zip+arity.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Zip+arity.swift
@@ -22,9 +22,8 @@ extension Observable {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func zip<O1: ObservableType, O2: ObservableType>
-        (source1: O1, _ source2: O2, resultSelector: (O1.E, O2.E) throws -> E)
+        (_ source1: O1, _ source2: O2, resultSelector: @escaping (O1.E, O2.E) throws -> E)
         -> Observable<E> {
         return Zip2(
             source1: source1.asObservable(), source2: source2.asObservable(),
@@ -42,12 +41,12 @@ class ZipSink2_<E1, E2, O: ObserverType> : ZipSink<O> {
     var _values1: Queue<E1> = Queue(capacity: 2)
     var _values2: Queue<E2> = Queue(capacity: 2)
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(arity: 2, observer: observer)
+        super.init(arity: 2, observer: observer, cancel: cancel)
     }
 
-    override func hasElements(index: Int) -> Bool {
+    override func hasElements(_ index: Int) -> Bool {
         switch (index) {
         case 0: return _values1.count > 0
         case 1: return _values2.count > 0
@@ -66,10 +65,10 @@ class ZipSink2_<E1, E2, O: ObserverType> : ZipSink<O> {
         let observer1 = ZipObserver(lock: _lock, parent: self, index: 0, setNextValue: { self._values1.enqueue($0) }, this: subscription1)
         let observer2 = ZipObserver(lock: _lock, parent: self, index: 1, setNextValue: { self._values2.enqueue($0) }, this: subscription2)
 
-        subscription1.disposable = _parent.source1.subscribe(observer1)
-        subscription2.disposable = _parent.source2.subscribe(observer2)
+        subscription1.setDisposable(_parent.source1.subscribe(observer1))
+        subscription2.setDisposable(_parent.source2.subscribe(observer2))
 
-        return CompositeDisposable(disposables: [
+        return Disposables.create([
            subscription1,
            subscription2
         ])
@@ -88,17 +87,17 @@ class Zip2<E1, E2, R> : Producer<R> {
 
     let _resultSelector: ResultSelector
 
-    init(source1: Observable<E1>, source2: Observable<E2>, resultSelector: ResultSelector) {
+    init(source1: Observable<E1>, source2: Observable<E2>, resultSelector: @escaping ResultSelector) {
         self.source1 = source1
         self.source2 = source2
 
         _resultSelector = resultSelector
     }
 
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = ZipSink2_(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = ZipSink2_(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -115,9 +114,8 @@ extension Observable {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func zip<O1: ObservableType, O2: ObservableType, O3: ObservableType>
-        (source1: O1, _ source2: O2, _ source3: O3, resultSelector: (O1.E, O2.E, O3.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, resultSelector: @escaping (O1.E, O2.E, O3.E) throws -> E)
         -> Observable<E> {
         return Zip3(
             source1: source1.asObservable(), source2: source2.asObservable(), source3: source3.asObservable(),
@@ -136,12 +134,12 @@ class ZipSink3_<E1, E2, E3, O: ObserverType> : ZipSink<O> {
     var _values2: Queue<E2> = Queue(capacity: 2)
     var _values3: Queue<E3> = Queue(capacity: 2)
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(arity: 3, observer: observer)
+        super.init(arity: 3, observer: observer, cancel: cancel)
     }
 
-    override func hasElements(index: Int) -> Bool {
+    override func hasElements(_ index: Int) -> Bool {
         switch (index) {
         case 0: return _values1.count > 0
         case 1: return _values2.count > 0
@@ -163,11 +161,11 @@ class ZipSink3_<E1, E2, E3, O: ObserverType> : ZipSink<O> {
         let observer2 = ZipObserver(lock: _lock, parent: self, index: 1, setNextValue: { self._values2.enqueue($0) }, this: subscription2)
         let observer3 = ZipObserver(lock: _lock, parent: self, index: 2, setNextValue: { self._values3.enqueue($0) }, this: subscription3)
 
-        subscription1.disposable = _parent.source1.subscribe(observer1)
-        subscription2.disposable = _parent.source2.subscribe(observer2)
-        subscription3.disposable = _parent.source3.subscribe(observer3)
+        subscription1.setDisposable(_parent.source1.subscribe(observer1))
+        subscription2.setDisposable(_parent.source2.subscribe(observer2))
+        subscription3.setDisposable(_parent.source3.subscribe(observer3))
 
-        return CompositeDisposable(disposables: [
+        return Disposables.create([
            subscription1,
            subscription2,
            subscription3
@@ -188,7 +186,7 @@ class Zip3<E1, E2, E3, R> : Producer<R> {
 
     let _resultSelector: ResultSelector
 
-    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, resultSelector: ResultSelector) {
+    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, resultSelector: @escaping ResultSelector) {
         self.source1 = source1
         self.source2 = source2
         self.source3 = source3
@@ -196,10 +194,10 @@ class Zip3<E1, E2, E3, R> : Producer<R> {
         _resultSelector = resultSelector
     }
 
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = ZipSink3_(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = ZipSink3_(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -216,9 +214,8 @@ extension Observable {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func zip<O1: ObservableType, O2: ObservableType, O3: ObservableType, O4: ObservableType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, resultSelector: (O1.E, O2.E, O3.E, O4.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E) throws -> E)
         -> Observable<E> {
         return Zip4(
             source1: source1.asObservable(), source2: source2.asObservable(), source3: source3.asObservable(), source4: source4.asObservable(),
@@ -238,12 +235,12 @@ class ZipSink4_<E1, E2, E3, E4, O: ObserverType> : ZipSink<O> {
     var _values3: Queue<E3> = Queue(capacity: 2)
     var _values4: Queue<E4> = Queue(capacity: 2)
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(arity: 4, observer: observer)
+        super.init(arity: 4, observer: observer, cancel: cancel)
     }
 
-    override func hasElements(index: Int) -> Bool {
+    override func hasElements(_ index: Int) -> Bool {
         switch (index) {
         case 0: return _values1.count > 0
         case 1: return _values2.count > 0
@@ -268,12 +265,12 @@ class ZipSink4_<E1, E2, E3, E4, O: ObserverType> : ZipSink<O> {
         let observer3 = ZipObserver(lock: _lock, parent: self, index: 2, setNextValue: { self._values3.enqueue($0) }, this: subscription3)
         let observer4 = ZipObserver(lock: _lock, parent: self, index: 3, setNextValue: { self._values4.enqueue($0) }, this: subscription4)
 
-        subscription1.disposable = _parent.source1.subscribe(observer1)
-        subscription2.disposable = _parent.source2.subscribe(observer2)
-        subscription3.disposable = _parent.source3.subscribe(observer3)
-        subscription4.disposable = _parent.source4.subscribe(observer4)
+        subscription1.setDisposable(_parent.source1.subscribe(observer1))
+        subscription2.setDisposable(_parent.source2.subscribe(observer2))
+        subscription3.setDisposable(_parent.source3.subscribe(observer3))
+        subscription4.setDisposable(_parent.source4.subscribe(observer4))
 
-        return CompositeDisposable(disposables: [
+        return Disposables.create([
            subscription1,
            subscription2,
            subscription3,
@@ -296,7 +293,7 @@ class Zip4<E1, E2, E3, E4, R> : Producer<R> {
 
     let _resultSelector: ResultSelector
 
-    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, resultSelector: ResultSelector) {
+    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, resultSelector: @escaping ResultSelector) {
         self.source1 = source1
         self.source2 = source2
         self.source3 = source3
@@ -305,10 +302,10 @@ class Zip4<E1, E2, E3, E4, R> : Producer<R> {
         _resultSelector = resultSelector
     }
 
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = ZipSink4_(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = ZipSink4_(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -325,9 +322,8 @@ extension Observable {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func zip<O1: ObservableType, O2: ObservableType, O3: ObservableType, O4: ObservableType, O5: ObservableType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E) throws -> E)
         -> Observable<E> {
         return Zip5(
             source1: source1.asObservable(), source2: source2.asObservable(), source3: source3.asObservable(), source4: source4.asObservable(), source5: source5.asObservable(),
@@ -348,12 +344,12 @@ class ZipSink5_<E1, E2, E3, E4, E5, O: ObserverType> : ZipSink<O> {
     var _values4: Queue<E4> = Queue(capacity: 2)
     var _values5: Queue<E5> = Queue(capacity: 2)
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(arity: 5, observer: observer)
+        super.init(arity: 5, observer: observer, cancel: cancel)
     }
 
-    override func hasElements(index: Int) -> Bool {
+    override func hasElements(_ index: Int) -> Bool {
         switch (index) {
         case 0: return _values1.count > 0
         case 1: return _values2.count > 0
@@ -381,13 +377,13 @@ class ZipSink5_<E1, E2, E3, E4, E5, O: ObserverType> : ZipSink<O> {
         let observer4 = ZipObserver(lock: _lock, parent: self, index: 3, setNextValue: { self._values4.enqueue($0) }, this: subscription4)
         let observer5 = ZipObserver(lock: _lock, parent: self, index: 4, setNextValue: { self._values5.enqueue($0) }, this: subscription5)
 
-        subscription1.disposable = _parent.source1.subscribe(observer1)
-        subscription2.disposable = _parent.source2.subscribe(observer2)
-        subscription3.disposable = _parent.source3.subscribe(observer3)
-        subscription4.disposable = _parent.source4.subscribe(observer4)
-        subscription5.disposable = _parent.source5.subscribe(observer5)
+        subscription1.setDisposable(_parent.source1.subscribe(observer1))
+        subscription2.setDisposable(_parent.source2.subscribe(observer2))
+        subscription3.setDisposable(_parent.source3.subscribe(observer3))
+        subscription4.setDisposable(_parent.source4.subscribe(observer4))
+        subscription5.setDisposable(_parent.source5.subscribe(observer5))
 
-        return CompositeDisposable(disposables: [
+        return Disposables.create([
            subscription1,
            subscription2,
            subscription3,
@@ -412,7 +408,7 @@ class Zip5<E1, E2, E3, E4, E5, R> : Producer<R> {
 
     let _resultSelector: ResultSelector
 
-    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, resultSelector: ResultSelector) {
+    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, resultSelector: @escaping ResultSelector) {
         self.source1 = source1
         self.source2 = source2
         self.source3 = source3
@@ -422,10 +418,10 @@ class Zip5<E1, E2, E3, E4, E5, R> : Producer<R> {
         _resultSelector = resultSelector
     }
 
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = ZipSink5_(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = ZipSink5_(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -442,9 +438,8 @@ extension Observable {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func zip<O1: ObservableType, O2: ObservableType, O3: ObservableType, O4: ObservableType, O5: ObservableType, O6: ObservableType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E) throws -> E)
         -> Observable<E> {
         return Zip6(
             source1: source1.asObservable(), source2: source2.asObservable(), source3: source3.asObservable(), source4: source4.asObservable(), source5: source5.asObservable(), source6: source6.asObservable(),
@@ -466,12 +461,12 @@ class ZipSink6_<E1, E2, E3, E4, E5, E6, O: ObserverType> : ZipSink<O> {
     var _values5: Queue<E5> = Queue(capacity: 2)
     var _values6: Queue<E6> = Queue(capacity: 2)
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(arity: 6, observer: observer)
+        super.init(arity: 6, observer: observer, cancel: cancel)
     }
 
-    override func hasElements(index: Int) -> Bool {
+    override func hasElements(_ index: Int) -> Bool {
         switch (index) {
         case 0: return _values1.count > 0
         case 1: return _values2.count > 0
@@ -502,14 +497,14 @@ class ZipSink6_<E1, E2, E3, E4, E5, E6, O: ObserverType> : ZipSink<O> {
         let observer5 = ZipObserver(lock: _lock, parent: self, index: 4, setNextValue: { self._values5.enqueue($0) }, this: subscription5)
         let observer6 = ZipObserver(lock: _lock, parent: self, index: 5, setNextValue: { self._values6.enqueue($0) }, this: subscription6)
 
-        subscription1.disposable = _parent.source1.subscribe(observer1)
-        subscription2.disposable = _parent.source2.subscribe(observer2)
-        subscription3.disposable = _parent.source3.subscribe(observer3)
-        subscription4.disposable = _parent.source4.subscribe(observer4)
-        subscription5.disposable = _parent.source5.subscribe(observer5)
-        subscription6.disposable = _parent.source6.subscribe(observer6)
+        subscription1.setDisposable(_parent.source1.subscribe(observer1))
+        subscription2.setDisposable(_parent.source2.subscribe(observer2))
+        subscription3.setDisposable(_parent.source3.subscribe(observer3))
+        subscription4.setDisposable(_parent.source4.subscribe(observer4))
+        subscription5.setDisposable(_parent.source5.subscribe(observer5))
+        subscription6.setDisposable(_parent.source6.subscribe(observer6))
 
-        return CompositeDisposable(disposables: [
+        return Disposables.create([
            subscription1,
            subscription2,
            subscription3,
@@ -536,7 +531,7 @@ class Zip6<E1, E2, E3, E4, E5, E6, R> : Producer<R> {
 
     let _resultSelector: ResultSelector
 
-    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, source6: Observable<E6>, resultSelector: ResultSelector) {
+    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, source6: Observable<E6>, resultSelector: @escaping ResultSelector) {
         self.source1 = source1
         self.source2 = source2
         self.source3 = source3
@@ -547,10 +542,10 @@ class Zip6<E1, E2, E3, E4, E5, E6, R> : Producer<R> {
         _resultSelector = resultSelector
     }
 
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = ZipSink6_(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = ZipSink6_(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -567,9 +562,8 @@ extension Observable {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func zip<O1: ObservableType, O2: ObservableType, O3: ObservableType, O4: ObservableType, O5: ObservableType, O6: ObservableType, O7: ObservableType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E) throws -> E)
         -> Observable<E> {
         return Zip7(
             source1: source1.asObservable(), source2: source2.asObservable(), source3: source3.asObservable(), source4: source4.asObservable(), source5: source5.asObservable(), source6: source6.asObservable(), source7: source7.asObservable(),
@@ -592,12 +586,12 @@ class ZipSink7_<E1, E2, E3, E4, E5, E6, E7, O: ObserverType> : ZipSink<O> {
     var _values6: Queue<E6> = Queue(capacity: 2)
     var _values7: Queue<E7> = Queue(capacity: 2)
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(arity: 7, observer: observer)
+        super.init(arity: 7, observer: observer, cancel: cancel)
     }
 
-    override func hasElements(index: Int) -> Bool {
+    override func hasElements(_ index: Int) -> Bool {
         switch (index) {
         case 0: return _values1.count > 0
         case 1: return _values2.count > 0
@@ -631,15 +625,15 @@ class ZipSink7_<E1, E2, E3, E4, E5, E6, E7, O: ObserverType> : ZipSink<O> {
         let observer6 = ZipObserver(lock: _lock, parent: self, index: 5, setNextValue: { self._values6.enqueue($0) }, this: subscription6)
         let observer7 = ZipObserver(lock: _lock, parent: self, index: 6, setNextValue: { self._values7.enqueue($0) }, this: subscription7)
 
-        subscription1.disposable = _parent.source1.subscribe(observer1)
-        subscription2.disposable = _parent.source2.subscribe(observer2)
-        subscription3.disposable = _parent.source3.subscribe(observer3)
-        subscription4.disposable = _parent.source4.subscribe(observer4)
-        subscription5.disposable = _parent.source5.subscribe(observer5)
-        subscription6.disposable = _parent.source6.subscribe(observer6)
-        subscription7.disposable = _parent.source7.subscribe(observer7)
+        subscription1.setDisposable(_parent.source1.subscribe(observer1))
+        subscription2.setDisposable(_parent.source2.subscribe(observer2))
+        subscription3.setDisposable(_parent.source3.subscribe(observer3))
+        subscription4.setDisposable(_parent.source4.subscribe(observer4))
+        subscription5.setDisposable(_parent.source5.subscribe(observer5))
+        subscription6.setDisposable(_parent.source6.subscribe(observer6))
+        subscription7.setDisposable(_parent.source7.subscribe(observer7))
 
-        return CompositeDisposable(disposables: [
+        return Disposables.create([
            subscription1,
            subscription2,
            subscription3,
@@ -668,7 +662,7 @@ class Zip7<E1, E2, E3, E4, E5, E6, E7, R> : Producer<R> {
 
     let _resultSelector: ResultSelector
 
-    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, source6: Observable<E6>, source7: Observable<E7>, resultSelector: ResultSelector) {
+    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, source6: Observable<E6>, source7: Observable<E7>, resultSelector: @escaping ResultSelector) {
         self.source1 = source1
         self.source2 = source2
         self.source3 = source3
@@ -680,10 +674,10 @@ class Zip7<E1, E2, E3, E4, E5, E6, E7, R> : Producer<R> {
         _resultSelector = resultSelector
     }
 
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = ZipSink7_(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = ZipSink7_(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
@@ -700,9 +694,8 @@ extension Observable {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func zip<O1: ObservableType, O2: ObservableType, O3: ObservableType, O4: ObservableType, O5: ObservableType, O6: ObservableType, O7: ObservableType, O8: ObservableType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, _ source8: O8, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E, O8.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, _ source8: O8, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E, O8.E) throws -> E)
         -> Observable<E> {
         return Zip8(
             source1: source1.asObservable(), source2: source2.asObservable(), source3: source3.asObservable(), source4: source4.asObservable(), source5: source5.asObservable(), source6: source6.asObservable(), source7: source7.asObservable(), source8: source8.asObservable(),
@@ -726,12 +719,12 @@ class ZipSink8_<E1, E2, E3, E4, E5, E6, E7, E8, O: ObserverType> : ZipSink<O> {
     var _values7: Queue<E7> = Queue(capacity: 2)
     var _values8: Queue<E8> = Queue(capacity: 2)
 
-    init(parent: Parent, observer: O) {
+    init(parent: Parent, observer: O, cancel: Cancelable) {
         _parent = parent
-        super.init(arity: 8, observer: observer)
+        super.init(arity: 8, observer: observer, cancel: cancel)
     }
 
-    override func hasElements(index: Int) -> Bool {
+    override func hasElements(_ index: Int) -> Bool {
         switch (index) {
         case 0: return _values1.count > 0
         case 1: return _values2.count > 0
@@ -768,16 +761,16 @@ class ZipSink8_<E1, E2, E3, E4, E5, E6, E7, E8, O: ObserverType> : ZipSink<O> {
         let observer7 = ZipObserver(lock: _lock, parent: self, index: 6, setNextValue: { self._values7.enqueue($0) }, this: subscription7)
         let observer8 = ZipObserver(lock: _lock, parent: self, index: 7, setNextValue: { self._values8.enqueue($0) }, this: subscription8)
 
-        subscription1.disposable = _parent.source1.subscribe(observer1)
-        subscription2.disposable = _parent.source2.subscribe(observer2)
-        subscription3.disposable = _parent.source3.subscribe(observer3)
-        subscription4.disposable = _parent.source4.subscribe(observer4)
-        subscription5.disposable = _parent.source5.subscribe(observer5)
-        subscription6.disposable = _parent.source6.subscribe(observer6)
-        subscription7.disposable = _parent.source7.subscribe(observer7)
-        subscription8.disposable = _parent.source8.subscribe(observer8)
+        subscription1.setDisposable(_parent.source1.subscribe(observer1))
+        subscription2.setDisposable(_parent.source2.subscribe(observer2))
+        subscription3.setDisposable(_parent.source3.subscribe(observer3))
+        subscription4.setDisposable(_parent.source4.subscribe(observer4))
+        subscription5.setDisposable(_parent.source5.subscribe(observer5))
+        subscription6.setDisposable(_parent.source6.subscribe(observer6))
+        subscription7.setDisposable(_parent.source7.subscribe(observer7))
+        subscription8.setDisposable(_parent.source8.subscribe(observer8))
 
-        return CompositeDisposable(disposables: [
+        return Disposables.create([
            subscription1,
            subscription2,
            subscription3,
@@ -808,7 +801,7 @@ class Zip8<E1, E2, E3, E4, E5, E6, E7, E8, R> : Producer<R> {
 
     let _resultSelector: ResultSelector
 
-    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, source6: Observable<E6>, source7: Observable<E7>, source8: Observable<E8>, resultSelector: ResultSelector) {
+    init(source1: Observable<E1>, source2: Observable<E2>, source3: Observable<E3>, source4: Observable<E4>, source5: Observable<E5>, source6: Observable<E6>, source7: Observable<E7>, source8: Observable<E8>, resultSelector: @escaping ResultSelector) {
         self.source1 = source1
         self.source2 = source2
         self.source3 = source3
@@ -821,10 +814,11 @@ class Zip8<E1, E2, E3, E4, E5, E6, E7, E8, R> : Producer<R> {
         _resultSelector = resultSelector
     }
 
-    override func run<O: ObserverType where O.E == R>(observer: O) -> Disposable {
-        let sink = ZipSink8_(parent: self, observer: observer)
-        sink.disposable = sink.run()
-        return sink
+    override func run<O: ObserverType>(_ observer: O, cancel: Cancelable) -> (sink: Disposable, subscription: Disposable) where O.E == R {
+        let sink = ZipSink8_(parent: self, observer: observer, cancel: cancel)
+        let subscription = sink.run()
+        return (sink: sink, subscription: subscription)
     }
 }
 
+
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Zip.swift b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Zip.swift
index 4590236..0cd273c 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Zip.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Implementations/Zip.swift
@@ -10,9 +10,9 @@ import Foundation
 
 protocol ZipSinkProtocol : class
 {
-    func next(index: Int)
-    func fail(error: ErrorType)
-    func done(index: Int)
+    func next(_ index: Int)
+    func fail(_ error: Swift.Error)
+    func done(_ index: Int)
 }
 
 class ZipSink<O: ObserverType> : Sink<O>, ZipSinkProtocol {
@@ -25,22 +25,22 @@ class ZipSink<O: ObserverType> : Sink<O>, ZipSinkProtocol {
     // state
     private var _isDone: [Bool]
     
-    init(arity: Int, observer: O) {
-        _isDone = [Bool](count: arity, repeatedValue: false)
+    init(arity: Int, observer: O, cancel: Cancelable) {
+        _isDone = [Bool](repeating: false, count: arity)
         _arity = arity
         
-        super.init(observer: observer)
+        super.init(observer: observer, cancel: cancel)
     }
 
     func getResult() throws -> Element {
         abstractMethod()
     }
     
-    func hasElements(index: Int) -> Bool {
+    func hasElements(_ index: Int) -> Bool {
         abstractMethod()
     }
     
-    func next(index: Int) {
+    func next(_ index: Int) {
         var hasValueAll = true
         
         for i in 0 ..< _arity {
@@ -53,10 +53,10 @@ class ZipSink<O: ObserverType> : Sink<O>, ZipSinkProtocol {
         if hasValueAll {
             do {
                 let result = try getResult()
-                self.forwardOn(.Next(result))
+                self.forwardOn(.next(result))
             }
             catch let e {
-                self.forwardOn(.Error(e))
+                self.forwardOn(.error(e))
                 dispose()
             }
         }
@@ -72,18 +72,18 @@ class ZipSink<O: ObserverType> : Sink<O>, ZipSinkProtocol {
             }
             
             if allOthersDone {
-                forwardOn(.Completed)
+                forwardOn(.completed)
                 self.dispose()
             }
         }
     }
     
-    func fail(error: ErrorType) {
-        forwardOn(.Error(error))
+    func fail(_ error: Swift.Error) {
+        forwardOn(.error(error))
         dispose()
     }
     
-    func done(index: Int) {
+    func done(_ index: Int) {
         _isDone[index] = true
         
         var allDone = true
@@ -96,7 +96,7 @@ class ZipSink<O: ObserverType> : Sink<O>, ZipSinkProtocol {
         }
         
         if allDone {
-            forwardOn(.Completed)
+            forwardOn(.completed)
             dispose()
         }
     }
@@ -118,7 +118,7 @@ class ZipObserver<ElementType>
     private let _this: Disposable
     private let _setNextValue: ValueSetter
     
-    init(lock: NSRecursiveLock, parent: ZipSinkProtocol, index: Int, setNextValue: ValueSetter, this: Disposable) {
+    init(lock: NSRecursiveLock, parent: ZipSinkProtocol, index: Int, setNextValue: @escaping ValueSetter, this: Disposable) {
         _lock = lock
         _parent = parent
         _index = index
@@ -126,30 +126,30 @@ class ZipObserver<ElementType>
         _setNextValue = setNextValue
     }
     
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         synchronizedOn(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) {
         if let _ = _parent {
             switch event {
-            case .Next(_):
+            case .next(_):
                 break
-            case .Error(_):
+            case .error(_):
                 _this.dispose()
-            case .Completed:
+            case .completed:
                 _this.dispose()
             }
         }
         
         if let parent = _parent {
             switch event {
-            case .Next(let value):
+            case .next(let value):
                 _setNextValue(value)
                 parent.next(_index)
-            case .Error(let error):
+            case .error(let error):
                 parent.fail(error)
-            case .Completed:
+            case .completed:
                 parent.done(_index)
             }
         }
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Aggregate.swift b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Aggregate.swift
index 0acdce6..8e7a29d 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Aggregate.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Aggregate.swift
@@ -1,6 +1,6 @@
 //
 //  Observable+Aggregate.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/22/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -24,8 +24,7 @@ extension ObservableType {
     - parameter mapResult: A function to transform the final accumulator value into the result value.
     - returns: An observable sequence containing a single element with the final accumulator value.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func reduce<A, R>(seed: A, accumulator: (A, E) throws -> A, mapResult: (A) throws -> R)
+    public func reduce<A, R>(_ seed: A, accumulator: @escaping (A, E) throws -> A, mapResult: @escaping (A) throws -> R)
         -> Observable<R> {
         return Reduce(source: self.asObservable(), seed: seed, accumulator: accumulator, mapResult: mapResult)
     }
@@ -41,8 +40,7 @@ extension ObservableType {
     - parameter accumulator: A accumulator function to be invoked on each element.
     - returns: An observable sequence containing a single element with the final accumulator value.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func reduce<A>(seed: A, accumulator: (A, E) throws -> A)
+    public func reduce<A>(_ seed: A, accumulator: @escaping (A, E) throws -> A)
         -> Observable<A> {
         return Reduce(source: self.asObservable(), seed: seed, accumulator: accumulator, mapResult: { $0 })
     }
@@ -56,7 +54,6 @@ extension ObservableType {
     
     - returns: An observable sequence containing all the emitted elements as array.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public func toArray()
         -> Observable<[E]> {
             return ToArray(source: self.asObservable())
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Binding.swift b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Binding.swift
index ee941b1..dd4a75e 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Binding.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Binding.swift
@@ -1,6 +1,6 @@
 //
 //  Observable+Binding.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/1/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -24,9 +24,8 @@ extension ObservableType {
     - parameter subject: Subject to push source elements into.
     - returns: A connectable observable sequence that upon connection causes the source sequence to push results into the specified subject.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func multicast<S: SubjectType where S.SubjectObserverType.E == E>(subject: S)
-        -> ConnectableObservable<S.E> {
+    public func multicast<S: SubjectType>(_ subject: S)
+        -> ConnectableObservable<S.E> where S.SubjectObserverType.E == E {
         return ConnectableObservableAdapter(source: self.asObservable(), subject: subject)
     }
 
@@ -43,9 +42,8 @@ extension ObservableType {
     - parameter selector: Selector function which can use the multicasted source sequence subject to the policies enforced by the created subject.
     - returns: An observable sequence that contains the elements of a sequence produced by multicasting the source sequence within a selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func multicast<S: SubjectType, R where S.SubjectObserverType.E == E>(subjectSelector: () throws -> S, selector: (Observable<S.E>) throws -> Observable<R>)
-        -> Observable<R> {
+    public func multicast<S: SubjectType, R>(_ subjectSelector: @escaping () throws -> S, selector: @escaping (Observable<S.E>) throws -> Observable<R>)
+        -> Observable<R> where S.SubjectObserverType.E == E {
         return Multicast(
             source: self.asObservable(),
             subjectSelector: subjectSelector,
@@ -67,7 +65,6 @@ extension ObservableType {
     
     - returns: A connectable observable sequence that shares a single subscription to the underlying sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public func publish() -> ConnectableObservable<E> {
         return self.multicast(PublishSubject())
     }
@@ -87,8 +84,7 @@ extension ObservableType {
     - parameter bufferSize: Maximum element count of the replay buffer.
     - returns: A connectable observable sequence that shares a single subscription to the underlying sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func replay(bufferSize: Int)
+    public func replay(_ bufferSize: Int)
         -> ConnectableObservable<E> {
         return self.multicast(ReplaySubject.create(bufferSize: bufferSize))
     }
@@ -102,7 +98,6 @@ extension ObservableType {
 
     - returns: A connectable observable sequence that shares a single subscription to the underlying sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public func replayAll()
         -> ConnectableObservable<E> {
         return self.multicast(ReplaySubject.createUnbounded())
@@ -120,7 +115,6 @@ extension ConnectableObservableType {
     
     - returns: An observable sequence that stays connected to the source as long as there is at least one subscription to the observable sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public func refCount() -> Observable<E> {
         return RefCount(source: self)
     }
@@ -139,7 +133,6 @@ extension ObservableType {
 
     - returns: An observable sequence that contains the elements of a sequence produced by multicasting the source sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public func share() -> Observable<E> {
         return self.publish().refCount()
     }
@@ -159,8 +152,7 @@ extension ObservableType {
     - parameter bufferSize: Maximum element count of the replay buffer.
     - returns: An observable sequence that contains the elements of a sequence produced by multicasting the source sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func shareReplay(bufferSize: Int)
+    public func shareReplay(_ bufferSize: Int)
         -> Observable<E> {
         if bufferSize == 1 {
             return ShareReplay1(source: self.asObservable())
@@ -182,9 +174,8 @@ extension ObservableType {
     
     - returns: An observable sequence that contains the elements of a sequence produced by multicasting the source sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public func shareReplayLatestWhileConnected()
         -> Observable<E> {
         return ShareReplay1WhileConnected(source: self.asObservable())
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Concurrency.swift b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Concurrency.swift
index 8af9111..ce66ae9 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Concurrency.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Concurrency.swift
@@ -1,6 +1,6 @@
 //
 //  Observable+Concurrency.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/15/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -23,8 +23,7 @@ extension ObservableType {
     - parameter scheduler: Scheduler to notify observers on.
     - returns: The source sequence whose observations happen on the specified scheduler.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func observeOn(scheduler: ImmediateSchedulerType)
+    public func observeOn(_ scheduler: ImmediateSchedulerType)
         -> Observable<E> {
         if let scheduler = scheduler as? SerialDispatchQueueScheduler {
             return ObserveOnSerialDispatchQueue(source: self.asObservable(), scheduler: scheduler)
@@ -54,9 +53,8 @@ extension ObservableType {
     - parameter scheduler: Scheduler to perform subscription and unsubscription actions on.
     - returns: The source sequence whose subscriptions and unsubscriptions happen on the specified scheduler.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func subscribeOn(scheduler: ImmediateSchedulerType)
+    public func subscribeOn(_ scheduler: ImmediateSchedulerType)
         -> Observable<E> {
         return SubscribeOn(source: self, scheduler: scheduler)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Creation.swift b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Creation.swift
index ff57d38..87de7ff 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Creation.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Creation.swift
@@ -1,6 +1,6 @@
 //
 //  Observable+Creation.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/21/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -19,8 +19,7 @@ extension Observable {
     - parameter subscribe: Implementation of the resulting observable sequence's `subscribe` method.
     - returns: The observable sequence with the specified implementation for the `subscribe` method.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func create(subscribe: (AnyObserver<E>) -> Disposable) -> Observable<E> {
+    public static func create(_ subscribe: @escaping (AnyObserver<E>) -> Disposable) -> Observable<E> {
         return AnonymousObservable(subscribe)
     }
 
@@ -33,7 +32,6 @@ extension Observable {
 
     - returns: An observable sequence with no elements.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func empty() -> Observable<E> {
         return Empty<E>()
     }
@@ -47,7 +45,6 @@ extension Observable {
 
     - returns: An observable sequence whose observers will never get called.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public static func never() -> Observable<E> {
         return Never()
     }
@@ -62,22 +59,20 @@ extension Observable {
     - parameter element: Single element in the resulting observable sequence.
     - returns: An observable sequence containing the single specified element.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func just(element: E) -> Observable<E> {
+    public static func just(_ element: E) -> Observable<E> {
         return Just(element: element)
     }
 
     /**
-    Returns an observable sequence that contains a single element.
+     Returns an observable sequence that contains a single element.
 
-    - seealso: [just operator on reactivex.io](http://reactivex.io/documentation/operators/just.html)
+     - seealso: [just operator on reactivex.io](http://reactivex.io/documentation/operators/just.html)
 
-    - parameter element: Single element in the resulting observable sequence.
-    - parameter: Scheduler to send the single element on.
-    - returns: An observable sequence containing the single specified element.
-    */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func just(element: E, scheduler: ImmediateSchedulerType) -> Observable<E> {
+     - parameter element: Single element in the resulting observable sequence.
+     - parameter: Scheduler to send the single element on.
+     - returns: An observable sequence containing the single specified element.
+     */
+    public static func just(_ element: E, scheduler: ImmediateSchedulerType) -> Observable<E> {
         return JustScheduled(element: element, scheduler: scheduler)
     }
 
@@ -90,8 +85,7 @@ extension Observable {
 
     - returns: The observable sequence that terminates with specified error.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func error(error: ErrorType) -> Observable<E> {
+    public static func error(_ error: Swift.Error) -> Observable<E> {
         return Error(error: error)
     }
 
@@ -106,9 +100,8 @@ extension Observable {
     - parameter scheduler: Scheduler to send elements on. If `nil`, elements are sent immediatelly on subscription.
     - returns: The observable sequence whose elements are pulled from the given arguments.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func of(elements: E ..., scheduler: ImmediateSchedulerType? = nil) -> Observable<E> {
-        return Sequence(elements: elements, scheduler: scheduler)
+    public static func of(_ elements: E ..., scheduler: ImmediateSchedulerType = CurrentThreadScheduler.instance) -> Observable<E> {
+        return ObservableSequence(elements: elements, scheduler: scheduler)
     }
 
     // MARK: defer
@@ -121,8 +114,7 @@ extension Observable {
     - parameter observableFactory: Observable factory function to invoke for each observer that subscribes to the resulting sequence.
     - returns: An observable sequence whose observers trigger an invocation of the given observable factory function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func deferred(observableFactory: () throws -> Observable<E>)
+    public static func deferred(_ observableFactory: @escaping () throws -> Observable<E>)
         -> Observable<E> {
         return Deferred(observableFactory: observableFactory)
     }
@@ -139,8 +131,7 @@ extension Observable {
     - parameter scheduler: Scheduler on which to run the generator loop.
     - returns: The generated sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func generate(initialState initialState: E, condition: E throws -> Bool, scheduler: ImmediateSchedulerType = CurrentThreadScheduler.instance, iterate: E throws -> E) -> Observable<E> {
+    public static func generate(initialState: E, condition: @escaping (E) throws -> Bool, scheduler: ImmediateSchedulerType = CurrentThreadScheduler.instance, iterate: @escaping (E) throws -> E) -> Observable<E> {
         return Generate(initialState: initialState, condition: condition, iterate: iterate, resultSelector: { $0 }, scheduler: scheduler)
     }
 
@@ -153,8 +144,7 @@ extension Observable {
     - parameter scheduler: Scheduler to run the producer loop on.
     - returns: An observable sequence that repeats the given element infinitely.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func repeatElement(element: E, scheduler: ImmediateSchedulerType = CurrentThreadScheduler.instance) -> Observable<E> {
+    public static func repeatElement(_ element: E, scheduler: ImmediateSchedulerType = CurrentThreadScheduler.instance) -> Observable<E> {
         return RepeatElement(element: element, scheduler: scheduler)
     }
 
@@ -167,13 +157,12 @@ extension Observable {
     - parameter observableFactory: Factory function to obtain an observable sequence that depends on the obtained resource.
     - returns: An observable sequence whose lifetime controls the lifetime of the dependent resource object.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func using<R: Disposable>(resourceFactory: () throws -> R, observableFactory: R throws -> Observable<E>) -> Observable<E> {
+    public static func using<R: Disposable>(_ resourceFactory: @escaping () throws -> R, observableFactory: @escaping (R) throws -> Observable<E>) -> Observable<E> {
         return Using(resourceFactory: resourceFactory, observableFactory: observableFactory)
     }
 }
 
-extension Observable where Element : SignedIntegerType {
+extension Observable where Element : SignedInteger {
     /**
     Generates an observable sequence of integral numbers within a specified range, using the specified scheduler to generate and send out observer messages.
 
@@ -184,36 +173,31 @@ extension Observable where Element : SignedIntegerType {
     - parameter scheduler: Scheduler to run the generator loop on.
     - returns: An observable sequence that contains a range of sequential integral numbers.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func range(start start: E, count: E, scheduler: ImmediateSchedulerType = CurrentThreadScheduler.instance) -> Observable<E> {
+    public static func range(start: E, count: E, scheduler: ImmediateSchedulerType = CurrentThreadScheduler.instance) -> Observable<E> {
         return RangeProducer<E>(start: start, count: count, scheduler: scheduler)
     }
 }
 
-extension SequenceType {
+extension Observable {
     /**
-    Converts a sequence to an observable sequence.
+     Converts an array to an observable sequence.
 
-    - seealso: [from operator on reactivex.io](http://reactivex.io/documentation/operators/from.html)
+     - seealso: [from operator on reactivex.io](http://reactivex.io/documentation/operators/from.html)
 
-    - returns: The observable sequence whose elements are pulled from the given enumerable sequence.
-    */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func toObservable(scheduler: ImmediateSchedulerType? = nil) -> Observable<Generator.Element> {
-        return Sequence(elements: Array(self), scheduler: scheduler)
+     - returns: The observable sequence whose elements are pulled from the given enumerable sequence.
+     */
+    public static func from(_ array: [E], scheduler: ImmediateSchedulerType = CurrentThreadScheduler.instance) -> Observable<E> {
+        return ObservableSequence(elements: array, scheduler: scheduler)
     }
-}
 
-extension Array {
     /**
-    Converts a sequence to an observable sequence.
+     Converts a sequence to an observable sequence.
 
-    - seealso: [from operator on reactivex.io](http://reactivex.io/documentation/operators/from.html)
+     - seealso: [from operator on reactivex.io](http://reactivex.io/documentation/operators/from.html)
 
-    - returns: The observable sequence whose elements are pulled from the given enumerable sequence.
-    */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func toObservable(scheduler: ImmediateSchedulerType? = nil) -> Observable<Generator.Element> {
-        return Sequence(elements: self, scheduler: scheduler)
+     - returns: The observable sequence whose elements are pulled from the given enumerable sequence.
+     */
+    public static func from<S: Sequence>(_ sequence: S, scheduler: ImmediateSchedulerType = CurrentThreadScheduler.instance) -> Observable<E> where S.Iterator.Element == E {
+        return ObservableSequence(elements: sequence, scheduler: scheduler)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Debug.swift b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Debug.swift
index 2aa355c..e0f1c71 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Debug.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Debug.swift
@@ -18,11 +18,11 @@ extension ObservableType {
     - seealso: [do operator on reactivex.io](http://reactivex.io/documentation/operators/do.html)
     
     - parameter identifier: Identifier that is printed together with event description to standard output.
+    - parameter trimOutput: Should output be trimmed to max 40 characters.
     - returns: An observable sequence whose events are printed to standard output.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func debug(identifier: String? = nil, file: String = #file, line: UInt = #line, function: String = #function)
+    public func debug(_ identifier: String? = nil, trimOutput: Bool = false, file: String = #file, line: UInt = #line, function: String = #function)
         -> Observable<E> {
-        return Debug(source: self.asObservable(), identifier: identifier, file: file, line: line, function: function)
+        return Debug(source: self, identifier: identifier, trimOutput: trimOutput, file: file, line: line, function: function)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Multiple.swift b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Multiple.swift
index 072ee40..c679683 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Multiple.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Multiple.swift
@@ -1,6 +1,6 @@
 //
 //  Observable+Multiple.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/12/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -10,37 +10,35 @@ import Foundation
 
 // MARK: combineLatest
 
-extension CollectionType where Generator.Element : ObservableType {
-    
+extension Observable {
     /**
-    Merges the specified observable sequences into one observable sequence by using the selector function whenever any of the observable sequences produces an element.
+     Merges the specified observable sequences into one observable sequence by using the selector function whenever any of the observable sequences produces an element.
 
-    - seealso: [combinelatest operator on reactivex.io](http://reactivex.io/documentation/operators/combinelatest.html)
-    
-    - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
-    - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
-    */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func combineLatest<R>(resultSelector: [Generator.Element.E] throws -> R) -> Observable<R> {
-        return CombineLatestCollectionType(sources: self, resultSelector: resultSelector)
+     - seealso: [combinelatest operator on reactivex.io](http://reactivex.io/documentation/operators/combinelatest.html)
+
+     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
+     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
+     */
+    public static func combineLatest<C: Collection>(_ collection: C, _ resultSelector: @escaping ([C.Iterator.Element.E]) throws -> Element) -> Observable<Element>
+        where C.Iterator.Element: ObservableType {
+        return CombineLatestCollectionType(sources: collection, resultSelector: resultSelector)
     }
 }
 
 // MARK: zip
 
-extension CollectionType where Generator.Element : ObservableType {
-    
+extension Observable {
     /**
-    Merges the specified observable sequences into one observable sequence by using the selector function whenever all of the observable sequences have produced an element at a corresponding index.
+     Merges the specified observable sequences into one observable sequence by using the selector function whenever all of the observable sequences have produced an element at a corresponding index.
 
-    - seealso: [zip operator on reactivex.io](http://reactivex.io/documentation/operators/zip.html)
-    
-    - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
-    - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
-    */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func zip<R>(resultSelector: [Generator.Element.E] throws -> R) -> Observable<R> {
-        return ZipCollectionType(sources: self, resultSelector: resultSelector)
+     - seealso: [zip operator on reactivex.io](http://reactivex.io/documentation/operators/zip.html)
+
+     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
+     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
+     */
+    public static func zip<C: Collection>(_ collection: C, _ resultSelector: @escaping ([C.Iterator.Element.E]) throws -> Element) -> Observable<Element>
+    where C.Iterator.Element: ObservableType {
+        return ZipCollectionType(sources: collection, resultSelector: resultSelector)
     }
 }
 
@@ -59,7 +57,6 @@ extension ObservableType where E : ObservableConvertibleType {
 
     - returns: The observable sequence that at any point in time produces the elements of the most recent inner observable sequence that has been received.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public func switchLatest() -> Observable<E.E> {
         return Switch(source: asObservable())
     }
@@ -77,54 +74,46 @@ extension ObservableType {
     - parameter second: Second observable sequence.
     - returns: An observable sequence that contains the elements of `self`, followed by those of the second sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func concat<O: ObservableConvertibleType where O.E == E>(second: O) -> Observable<E> {
-        return [asObservable(), second.asObservable()].concat()
+    public func concat<O: ObservableConvertibleType>(_ second: O) -> Observable<E> where O.E == E {
+        return Observable.concat([self.asObservable(), second.asObservable()])
     }
 }
 
-extension SequenceType where Generator.Element : ObservableType {
-    
+extension Observable {
     /**
-    Concatenates all observable sequences in the given sequence, as long as the previous observable sequence terminated successfully.
-    
-    This operator has tail recursive optimizations that will prevent stack overflow.
-     
-    Optimizations will be performed in cases equivalent to following:
-     
-        [1, [2, [3, .....].concat()].concat].concat()
+     Concatenates all observable sequences in the given sequence, as long as the previous observable sequence terminated successfully.
 
-    - seealso: [concat operator on reactivex.io](http://reactivex.io/documentation/operators/concat.html)
+     This operator has tail recursive optimizations that will prevent stack overflow.
 
-    - returns: An observable sequence that contains the elements of each given sequence, in sequential order.
-    */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func concat()
-        -> Observable<Generator.Element.E> {
-        return Concat(sources: self, count: nil)
+     Optimizations will be performed in cases equivalent to following:
+
+     [1, [2, [3, .....].concat()].concat].concat()
+
+     - seealso: [concat operator on reactivex.io](http://reactivex.io/documentation/operators/concat.html)
+
+     - returns: An observable sequence that contains the elements of each given sequence, in sequential order.
+     */
+    public static func concat<S: Sequence >(_ sequence: S) -> Observable<Element>
+        where S.Iterator.Element == Observable<Element> {
+            return Concat(sources: sequence, count: nil)
     }
-}
 
-extension CollectionType where Generator.Element : ObservableType {
-    
     /**
-    Concatenates all observable sequences in the given sequence, as long as the previous observable sequence terminated successfully.
+     Concatenates all observable sequences in the given collection, as long as the previous observable sequence terminated successfully.
 
-    This operator has tail recursive optimizations that will prevent stack overflow and enable generating
-     infinite observable sequences while using limited amount of memory during generation.
+     This operator has tail recursive optimizations that will prevent stack overflow.
 
-    Optimizations will be performed in cases equivalent to following:
-     
-        [1, [2, [3, .....].concat()].concat].concat()
+     Optimizations will be performed in cases equivalent to following:
 
-    - seealso: [concat operator on reactivex.io](http://reactivex.io/documentation/operators/concat.html)
-    
-    - returns: An observable sequence that contains the elements of each given sequence, in sequential order.
-    */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func concat()
-        -> Observable<Generator.Element.E> {
-        return Concat(sources: self, count: self.count.toIntMax())
+     [1, [2, [3, .....].concat()].concat].concat()
+
+     - seealso: [concat operator on reactivex.io](http://reactivex.io/documentation/operators/concat.html)
+
+     - returns: An observable sequence that contains the elements of each given sequence, in sequential order.
+     */
+    public static func concat<S: Collection >(_ collection: S) -> Observable<Element>
+        where S.Iterator.Element == Observable<Element> {
+            return Concat(sources: collection, count: collection.count.toIntMax())
     }
 }
 
@@ -137,7 +126,6 @@ extension ObservableType where E : ObservableConvertibleType {
     
     - returns: An observable sequence that contains the elements of each observed inner sequence, in sequential order.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public func concat() -> Observable<E.E> {
         return merge(maxConcurrent: 1)
     }
@@ -154,7 +142,6 @@ extension ObservableType where E : ObservableConvertibleType {
     
     - returns: The observable sequence that merges the elements of the observable sequences.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public func merge() -> Observable<E.E> {
         return Merge(source: asObservable())
     }
@@ -167,8 +154,7 @@ extension ObservableType where E : ObservableConvertibleType {
     - parameter maxConcurrent: Maximum number of inner observable sequences being subscribed to concurrently.
     - returns: The observable sequence that merges the elements of the inner sequences.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func merge(maxConcurrent maxConcurrent: Int)
+    public func merge(maxConcurrent: Int)
         -> Observable<E.E> {
         return MergeLimited(source: asObservable(), maxConcurrent: maxConcurrent)
     }
@@ -186,8 +172,7 @@ extension ObservableType {
     - parameter handler: Error handler function, producing another observable sequence.
     - returns: An observable sequence containing the source sequence's elements, followed by the elements produced by the handler's resulting observable sequence in case an error occurred.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func catchError(handler: (ErrorType) throws -> Observable<E>)
+    public func catchError(_ handler: @escaping (Swift.Error) throws -> Observable<E>)
         -> Observable<E> {
         return Catch(source: asObservable(), handler: handler)
     }
@@ -200,26 +185,24 @@ extension ObservableType {
     - parameter element: Last element in an observable sequence in case error occurs.
     - returns: An observable sequence containing the source sequence's elements, followed by the `element` in case an error occurred.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func catchErrorJustReturn(element: E)
+    public func catchErrorJustReturn(_ element: E)
         -> Observable<E> {
         return Catch(source: asObservable(), handler: { _ in Observable.just(element) })
     }
     
 }
 
-extension SequenceType where Generator.Element : ObservableType {
+extension Observable {
     /**
-    Continues an observable sequence that is terminated by an error with the next observable sequence.
+     Continues an observable sequence that is terminated by an error with the next observable sequence.
 
-    - seealso: [catch operator on reactivex.io](http://reactivex.io/documentation/operators/catch.html)
-    
-    - returns: An observable sequence containing elements from consecutive source sequences until a source sequence terminates successfully.
-    */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func catchError()
-        -> Observable<Generator.Element.E> {
-        return CatchSequence(sources: self)
+     - seealso: [catch operator on reactivex.io](http://reactivex.io/documentation/operators/catch.html)
+
+     - returns: An observable sequence containing elements from consecutive source sequences until a source sequence terminates successfully.
+     */
+    public static func catchError<S: Sequence>(_ sequence: S) -> Observable<Element>
+        where S.Iterator.Element == Observable<Element> {
+        return CatchSequence(sources: sequence)
     }
 }
 
@@ -235,8 +218,7 @@ extension ObservableType {
     - parameter other: Observable sequence that terminates propagation of elements of the source sequence.
     - returns: An observable sequence containing the elements of the source sequence up to the point the other sequence interrupted further propagation.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func takeUntil<O: ObservableType>(other: O)
+    public func takeUntil<O: ObservableType>(_ other: O)
         -> Observable<E> {
         return TakeUntil(source: asObservable(), other: other.asObservable())
     }
@@ -254,8 +236,7 @@ extension ObservableType {
     - parameter other: Observable sequence that starts propagation of elements of the source sequence.
     - returns: An observable sequence containing the elements of the source sequence that are emitted after the other sequence emits an item.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func skipUntil<O: ObservableType>(other: O)
+    public func skipUntil<O: ObservableType>(_ other: O)
         -> Observable<E> {
         return SkipUntil(source: asObservable(), other: other.asObservable())
     }
@@ -273,27 +254,24 @@ extension ObservableType {
     - parameter right: Second observable sequence.
     - returns: An observable sequence that surfaces either of the given sequences, whichever reacted first.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func amb<O2: ObservableType where O2.E == E>
-        (right: O2)
-        -> Observable<E> {
+    public func amb<O2: ObservableType>
+        (_ right: O2)
+        -> Observable<E> where O2.E == E {
         return Amb(left: asObservable(), right: right.asObservable())
     }
 }
 
-extension SequenceType where Generator.Element : ObservableType {
-    
+extension Observable {
     /**
-    Propagates the observable sequence that reacts first.
+     Propagates the observable sequence that reacts first.
 
-    - seealso: [amb operator on reactivex.io](http://reactivex.io/documentation/operators/amb.html)
-    
-    - returns: An observable sequence that surfaces any of the given sequences, whichever reacted first.
-    */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func amb()
-        -> Observable<Generator.Element.E> {
-        return self.reduce(Observable.never()) { a, o in
+     - seealso: [amb operator on reactivex.io](http://reactivex.io/documentation/operators/amb.html)
+
+     - returns: An observable sequence that surfaces any of the given sequences, whichever reacted first.
+     */
+    public static func amb<S: Sequence>(_ sequence: S) -> Observable<Element>
+        where S.Iterator.Element == Observable<Element> {
+        return sequence.reduce(Observable<S.Iterator.Element.E>.never()) { a, o in
             return a.amb(o.asObservable())
         }
     }
@@ -312,7 +290,7 @@ extension ObservableType {
     - parameter resultSelector: Function to invoke for each element from the self combined with the latest element from the second source, if any.
     - returns: An observable sequence containing the result of combining each element of the self  with the latest element from the second source, if any, using the specified result selector function.
     */
-    public func withLatestFrom<SecondO: ObservableConvertibleType, ResultType>(second: SecondO, resultSelector: (E, SecondO.E) throws -> ResultType) -> Observable<ResultType> {
+    public func withLatestFrom<SecondO: ObservableConvertibleType, ResultType>(_ second: SecondO, resultSelector: @escaping (E, SecondO.E) throws -> ResultType) -> Observable<ResultType> {
         return WithLatestFrom(first: asObservable(), second: second.asObservable(), resultSelector: resultSelector)
     }
 
@@ -324,7 +302,7 @@ extension ObservableType {
     - parameter second: Second observable source.
     - returns: An observable sequence containing the result of combining each element of the self  with the latest element from the second source, if any, using the specified result selector function.
     */
-    public func withLatestFrom<SecondO: ObservableConvertibleType>(second: SecondO) -> Observable<SecondO.E> {
+    public func withLatestFrom<SecondO: ObservableConvertibleType>(_ second: SecondO) -> Observable<SecondO.E> {
         return WithLatestFrom(first: asObservable(), second: second.asObservable(), resultSelector: { $1 })
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Single.swift b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Single.swift
index 969f641..d0e38bb 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Single.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Single.swift
@@ -1,6 +1,6 @@
 //
 //  Observable+Single.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/14/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -19,7 +19,6 @@ extension ObservableType where E: Equatable {
     
     - returns: An observable sequence only containing the distinct contiguous elements, based on equality operator, from the source sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public func distinctUntilChanged()
         -> Observable<E> {
         return self.distinctUntilChanged({ $0 }, comparer: { ($0 == $1) })
@@ -35,8 +34,7 @@ extension ObservableType {
     - parameter keySelector: A function to compute the comparison key for each element.
     - returns: An observable sequence only containing the distinct contiguous elements, based on a computed key value, from the source sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func distinctUntilChanged<K: Equatable>(keySelector: (E) throws -> K)
+    public func distinctUntilChanged<K: Equatable>(_ keySelector: @escaping (E) throws -> K)
         -> Observable<E> {
         return self.distinctUntilChanged(keySelector, comparer: { $0 == $1 })
     }
@@ -49,8 +47,7 @@ extension ObservableType {
     - parameter comparer: Equality comparer for computed key values.
     - returns: An observable sequence only containing the distinct contiguous elements, based on `comparer`, from the source sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func distinctUntilChanged(comparer: (lhs: E, rhs: E) throws -> Bool)
+    public func distinctUntilChanged(_ comparer: @escaping (E, E) throws -> Bool)
         -> Observable<E> {
         return self.distinctUntilChanged({ $0 }, comparer: comparer)
     }
@@ -64,8 +61,7 @@ extension ObservableType {
     - parameter comparer: Equality comparer for computed key values.
     - returns: An observable sequence only containing the distinct contiguous elements, based on a computed key value and the comparer, from the source sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func distinctUntilChanged<K>(keySelector: (E) throws -> K, comparer: (lhs: K, rhs: K) throws -> Bool)
+    public func distinctUntilChanged<K>(_ keySelector: @escaping (E) throws -> K, comparer: @escaping (K, K) throws -> Bool)
         -> Observable<E> {
         return DistinctUntilChanged(source: self.asObservable(), selector: keySelector, comparer: comparer)
     }
@@ -74,80 +70,30 @@ extension ObservableType {
 // MARK: doOn
 
 extension ObservableType {
-    
     /**
-    Invokes an action for each event in the observable sequence, and propagates all observer messages through the result sequence.
-
-    - seealso: [do operator on reactivex.io](http://reactivex.io/documentation/operators/do.html)
-    
-    - parameter eventHandler: Action to invoke for each event in the observable sequence.
-    - returns: The source sequence with the side-effecting behavior applied.
-    */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func doOn(eventHandler: (Event<E>) throws -> Void)
-        -> Observable<E> {
-        return Do(source: self.asObservable(), eventHandler: eventHandler)
-    }
-
-    /**
-    Invokes an action for each event in the observable sequence, and propagates all observer messages through the result sequence.
-
-    - seealso: [do operator on reactivex.io](http://reactivex.io/documentation/operators/do.html)
-    
-    - parameter onNext: Action to invoke for each element in the observable sequence.
-    - parameter onError: Action to invoke upon errored termination of the observable sequence.
-    - parameter onCompleted: Action to invoke upon graceful termination of the observable sequence.
-    - returns: The source sequence with the side-effecting behavior applied.
-    */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func doOn(onNext onNext: (E throws -> Void)? = nil, onError: (ErrorType throws -> Void)? = nil, onCompleted: (() throws -> Void)? = nil)
-        -> Observable<E> {
-        return Do(source: self.asObservable()) { e in
-            switch e {
-            case .Next(let element):
-                try onNext?(element)
-            case .Error(let e):
-                try onError?(e)
-            case .Completed:
-                try onCompleted?()
-            }
-        }
-    }
+     Invokes an action for each event in the observable sequence, and propagates all observer messages through the result sequence.
 
-    /**
-     Invokes an action for each Next event in the observable sequence, and propagates all observer messages through the result sequence.
+     - seealso: [do operator on reactivex.io](http://reactivex.io/documentation/operators/do.html)
 
      - parameter onNext: Action to invoke for each element in the observable sequence.
-     - returns: The source sequence with the side-effecting behavior applied.
-     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func doOnNext(onNext: (E throws -> Void))
-        -> Observable<E> {
-        return self.doOn(onNext: onNext)
-    }
-
-    /**
-     Invokes an action for the Error event in the observable sequence, and propagates all observer messages through the result sequence.
-
      - parameter onError: Action to invoke upon errored termination of the observable sequence.
-     - returns: The source sequence with the side-effecting behavior applied.
-     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func doOnError(onError: (ErrorType throws -> Void))
-        -> Observable<E> {
-        return self.doOn(onError: onError)
-    }
-
-    /**
-     Invokes an action for the Completed event in the observable sequence, and propagates all observer messages through the result sequence.
-
      - parameter onCompleted: Action to invoke upon graceful termination of the observable sequence.
-     - returns: The source sequence with the side-effecting behavior applied.
+     - parameter onSubscribe: Action to invoke before subscribing to source observable sequence.
+     - parameter onDispose: Action to invoke after subscription to source observable has been disposed for any reason. It can be either because sequence terminates for some reason or observer subscription being disposed.
+    - returns: The source sequence with the side-effecting behavior applied.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func doOnCompleted(onCompleted: (() throws -> Void))
+    public func `do`(onNext: ((E) throws -> Void)? = nil, onError: ((Swift.Error) throws -> Void)? = nil, onCompleted: (() throws -> Void)? = nil, onSubscribe: (() -> ())? = nil, onDispose: (() -> ())? = nil)
         -> Observable<E> {
-        return self.doOn(onCompleted: onCompleted)
+            return Do(source: self.asObservable(), eventHandler: { e in
+                switch e {
+                case .next(let element):
+                    try onNext?(element)
+                case .error(let e):
+                    try onError?(e)
+                case .completed:
+                    try onCompleted?()
+                }
+            }, onSubscribe: onSubscribe, onDispose: onDispose)
     }
 }
 
@@ -163,8 +109,7 @@ extension ObservableType {
     - parameter elements: Elements to prepend to the specified sequence.
     - returns: The source sequence prepended with the specified values.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func startWith(elements: E ...)
+    public func startWith(_ elements: E ...)
         -> Observable<E> {
         return StartWith(source: self.asObservable(), elements: elements)
     }
@@ -183,7 +128,6 @@ extension ObservableType {
     
     - returns: Observable sequence to repeat until it successfully terminates.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public func retry() -> Observable<E> {
         return CatchSequence(sources: InfiniteSequence(repeatedValue: self.asObservable()))
     }
@@ -198,10 +142,9 @@ extension ObservableType {
     - parameter maxAttemptCount: Maximum number of times to repeat the sequence.
     - returns: An observable sequence producing the elements of the given sequence repeatedly until it terminates successfully.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func retry(maxAttemptCount: Int)
+    public func retry(_ maxAttemptCount: Int)
         -> Observable<E> {
-        return CatchSequence(sources: Repeat(count: maxAttemptCount, repeatedValue: self.asObservable()))
+        return CatchSequence(sources: repeatElement(self.asObservable(), count: maxAttemptCount))
     }
     
     /**
@@ -213,8 +156,7 @@ extension ObservableType {
     - parameter notificationHandler: A handler that is passed an observable sequence of errors raised by the source observable and returns and observable that either continues, completes or errors. This behavior is then applied to the source observable.
     - returns: An observable sequence producing the elements of the given sequence repeatedly until it terminates successfully or is notified to error or complete.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func retryWhen<TriggerObservable: ObservableType, Error: ErrorType>(notificationHandler: Observable<Error> -> TriggerObservable)
+    public func retryWhen<TriggerObservable: ObservableType, Error: Swift.Error>(_ notificationHandler: @escaping (Observable<Error>) -> TriggerObservable)
         -> Observable<E> {
             return RetryWhenSequence(sources: InfiniteSequence(repeatedValue: self.asObservable()), notificationHandler: notificationHandler)
     }
@@ -228,8 +170,7 @@ extension ObservableType {
     - parameter notificationHandler: A handler that is passed an observable sequence of errors raised by the source observable and returns and observable that either continues, completes or errors. This behavior is then applied to the source observable.
     - returns: An observable sequence producing the elements of the given sequence repeatedly until it terminates successfully or is notified to error or complete.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func retryWhen<TriggerObservable: ObservableType>(notificationHandler: Observable<ErrorType> -> TriggerObservable)
+    public func retryWhen<TriggerObservable: ObservableType>(_ notificationHandler: @escaping (Observable<Swift.Error>) -> TriggerObservable)
         -> Observable<E> {
             return RetryWhenSequence(sources: InfiniteSequence(repeatedValue: self.asObservable()), notificationHandler: notificationHandler)
     }
@@ -250,9 +191,8 @@ extension ObservableType {
     - parameter accumulator: An accumulator function to be invoked on each element.
     - returns: An observable sequence containing the accumulated values.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func scan<A>(seed: A, accumulator: (A, E) throws -> A)
+    public func scan<A>(_ seed: A, accumulator: @escaping (A, E) throws -> A)
         -> Observable<A> {
         return Scan(source: self.asObservable(), seed: seed, accumulator: accumulator)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Observable+StandardSequenceOperators.swift b/Example/Pods/RxSwift/RxSwift/Observables/Observable+StandardSequenceOperators.swift
index 2fa425a..4dd53f8 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Observable+StandardSequenceOperators.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Observable+StandardSequenceOperators.swift
@@ -1,6 +1,6 @@
 //
 //  Observable+StandardSequenceOperators.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/17/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -20,8 +20,7 @@ extension ObservableType {
     - parameter predicate: A function to test each source element for a condition.
     - returns: An observable sequence that contains elements from the input sequence that satisfy the condition.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func filter(predicate: (E) throws -> Bool)
+    public func filter(_ predicate: @escaping (E) throws -> Bool)
         -> Observable<E> {
         return Filter(source: asObservable(), predicate: predicate)
     }
@@ -39,8 +38,7 @@ extension ObservableType {
     - parameter predicate: A function to test each element for a condition.
     - returns: An observable sequence that contains the elements from the input sequence that occur before the element at which the test no longer passes.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func takeWhile(predicate: (E) throws -> Bool)
+    public func takeWhile(_ predicate: @escaping (E) throws -> Bool)
         -> Observable<E> {
         return TakeWhile(source: asObservable(), predicate: predicate)
     }
@@ -55,8 +53,7 @@ extension ObservableType {
     - parameter predicate: A function to test each element for a condition; the second parameter of the function represents the index of the source element.
     - returns: An observable sequence that contains the elements from the input sequence that occur before the element at which the test no longer passes.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func takeWhileWithIndex(predicate: (E, Int) throws -> Bool)
+    public func takeWhileWithIndex(_ predicate: @escaping (E, Int) throws -> Bool)
         -> Observable<E> {
         return TakeWhile(source: asObservable(), predicate: predicate)
     }
@@ -74,8 +71,7 @@ extension ObservableType {
     - parameter count: The number of elements to return.
     - returns: An observable sequence that contains the specified number of elements from the start of the input sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func take(count: Int)
+    public func take(_ count: Int)
         -> Observable<E> {
         if count == 0 {
             return Observable.empty()
@@ -100,8 +96,7 @@ extension ObservableType {
      - parameter count: Number of elements to take from the end of the source sequence.
      - returns: An observable sequence containing the specified number of elements from the end of the source sequence.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func takeLast(count: Int)
+    public func takeLast(_ count: Int)
         -> Observable<E> {
         return TakeLast(source: asObservable(), count: count)
     }
@@ -120,8 +115,7 @@ extension ObservableType {
     - parameter count: The number of elements to skip before returning the remaining elements.
     - returns: An observable sequence that contains the elements that occur after the specified index in the input sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func skip(count: Int)
+    public func skip(_ count: Int)
         -> Observable<E> {
         return SkipCount(source: asObservable(), count: count)
     }
@@ -139,8 +133,7 @@ extension ObservableType {
     - parameter predicate: A function to test each element for a condition.
     - returns: An observable sequence that contains the elements from the input sequence starting at the first element in the linear series that does not pass the test specified by predicate.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func skipWhile(predicate: (E) throws -> Bool) -> Observable<E> {
+    public func skipWhile(_ predicate: @escaping (E) throws -> Bool) -> Observable<E> {
         return SkipWhile(source: asObservable(), predicate: predicate)
     }
    
@@ -153,8 +146,7 @@ extension ObservableType {
     - parameter predicate: A function to test each element for a condition; the second parameter of the function represents the index of the source element.
     - returns: An observable sequence that contains the elements from the input sequence starting at the first element in the linear series that does not pass the test specified by predicate.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func skipWhileWithIndex(predicate: (E, Int) throws -> Bool) -> Observable<E> {
+    public func skipWhileWithIndex(_ predicate: @escaping (E, Int) throws -> Bool) -> Observable<E> {
         return SkipWhile(source: asObservable(), predicate: predicate)
     }
 }
@@ -168,14 +160,13 @@ extension ObservableType {
     
     - seealso: [map operator on reactivex.io](http://reactivex.io/documentation/operators/map.html)
 
-    - parameter selector: A transform function to apply to each source element.
+    - parameter transform: A transform function to apply to each source element.
     - returns: An observable sequence whose elements are the result of invoking the transform function on each element of source.
      
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func map<R>(selector: E throws -> R)
+    public func map<R>(_ transform: @escaping (E) throws -> R)
         -> Observable<R> {
-        return self.asObservable().composeMap(selector)
+        return self.asObservable().composeMap(transform)
     }
 
     /**
@@ -186,8 +177,7 @@ extension ObservableType {
     - parameter selector: A transform function to apply to each source element; the second parameter of the function represents the index of the source element.
     - returns: An observable sequence whose elements are the result of invoking the transform function on each element of source.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func mapWithIndex<R>(selector: (E, Int) throws -> R)
+    public func mapWithIndex<R>(_ selector: @escaping (E, Int) throws -> R)
         -> Observable<R> {
         return MapWithIndex(source: asObservable(), selector: selector)
     }
@@ -205,8 +195,7 @@ extension ObservableType {
     - parameter selector: A transform function to apply to each element.
     - returns: An observable sequence whose elements are the result of invoking the one-to-many transform function on each element of the input sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func flatMap<O: ObservableConvertibleType>(selector: (E) throws -> O)
+    public func flatMap<O: ObservableConvertibleType>(_ selector: @escaping (E) throws -> O)
         -> Observable<O.E> {
         return FlatMap(source: asObservable(), selector: selector)
     }
@@ -219,8 +208,7 @@ extension ObservableType {
     - parameter selector: A transform function to apply to each element; the second parameter of the function represents the index of the source element.
     - returns: An observable sequence whose elements are the result of invoking the one-to-many transform function on each element of the input sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func flatMapWithIndex<O: ObservableConvertibleType>(selector: (E, Int) throws -> O)
+    public func flatMapWithIndex<O: ObservableConvertibleType>(_ selector: @escaping (E, Int) throws -> O)
         -> Observable<O.E> {
         return FlatMapWithIndex(source: asObservable(), selector: selector)
     }
@@ -239,8 +227,7 @@ extension ObservableType {
     - parameter selector: A transform function to apply to element that was observed while no observable is executing in parallel.
     - returns: An observable sequence whose elements are the result of invoking the one-to-many transform function on each element of the input sequence that was received while no other sequence was being calculated.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func flatMapFirst<O: ObservableConvertibleType>(selector: (E) throws -> O)
+    public func flatMapFirst<O: ObservableConvertibleType>(_ selector: @escaping (E) throws -> O)
         -> Observable<O.E> {
         return FlatMapFirst(source: asObservable(), selector: selector)
     }
@@ -261,8 +248,7 @@ extension ObservableType {
      - returns: An observable sequence whose elements are the result of invoking the transform function on each element of source producing an 
         Observable of Observable sequences and that at any point in time produces the elements of the most recent inner observable sequence that has been received.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func flatMapLatest<O: ObservableConvertibleType>(selector: (E) throws -> O)
+    public func flatMapLatest<O: ObservableConvertibleType>(_ selector: @escaping (E) throws -> O)
         -> Observable<O.E> {
             return FlatMapLatest(source: asObservable(), selector: selector)
     }
@@ -280,8 +266,7 @@ extension ObservableType {
     - parameter index: The index of the required item (starting from 0).
     - returns: An observable sequence that emits the desired item as its own sole emission.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func elementAt(index: Int)
+    public func elementAt(_ index: Int)
         -> Observable<E> {
         return ElementAt(source: asObservable(), index: index, throwOnEmpty: true)
     }
@@ -299,7 +284,6 @@ extension ObservableType {
     
     - returns: An observable sequence that emits a single item or throws an exception if more (or none) of them are emitted.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public func single()
         -> Observable<E> {
         return SingleAsync(source: asObservable())
@@ -314,10 +298,9 @@ extension ObservableType {
     - parameter predicate: A function to test each source element for a condition.
     - returns: An observable sequence that emits a single item or throws an exception if more (or none) of them are emitted.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func single(predicate: (E) throws -> Bool)
+    public func single(_ predicate: @escaping (E) throws -> Bool)
         -> Observable<E> {
         return SingleAsync(source: asObservable(), predicate: predicate)
     }
 
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Time.swift b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Time.swift
index 9050ce5..7eb9232 100644
--- a/Example/Pods/RxSwift/RxSwift/Observables/Observable+Time.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observables/Observable+Time.swift
@@ -1,6 +1,6 @@
 //
 //  Observable+Time.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/22/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -12,37 +12,34 @@ import Foundation
 extension ObservableType {
     
     /**
-    Ignores elements from an observable sequence which are followed by another element within a specified relative time duration, using the specified scheduler to run throttling timers.
- 
-    `throttle` and `debounce` are synonyms.
-
+    Returns an Observable that emits the first and the latest item emitted by the source Observable during sequential time windows of a specified duration.
+    
+    This operator makes sure that no two elements are emitted in less then dueTime.
+     
     - seealso: [debounce operator on reactivex.io](http://reactivex.io/documentation/operators/debounce.html)
     
     - parameter dueTime: Throttling duration for each element.
+    - parameter latest: Should latest element received in a dueTime wide time window since last element emission be emitted.
     - parameter scheduler: Scheduler to run the throttle timers and send events on.
     - returns: The throttled sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func throttle(dueTime: RxTimeInterval, scheduler: SchedulerType)
+    public func throttle(_ dueTime: RxTimeInterval, latest: Bool = true, scheduler: SchedulerType)
         -> Observable<E> {
-        return Throttle(source: self.asObservable(), dueTime: dueTime, scheduler: scheduler)
+        return Throttle(source: self.asObservable(), dueTime: dueTime, latest: latest, scheduler: scheduler)
     }
 
     /**
     Ignores elements from an observable sequence which are followed by another element within a specified relative time duration, using the specified scheduler to run throttling timers.
     
-    `throttle` and `debounce` are synonyms.
-
     - seealso: [debounce operator on reactivex.io](http://reactivex.io/documentation/operators/debounce.html)
     
     - parameter dueTime: Throttling duration for each element.
     - parameter scheduler: Scheduler to run the throttle timers and send events on.
     - returns: The throttled sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func debounce(dueTime: RxTimeInterval, scheduler: SchedulerType)
+    public func debounce(_ dueTime: RxTimeInterval, scheduler: SchedulerType)
         -> Observable<E> {
-        return Throttle(source: self.asObservable(), dueTime: dueTime, scheduler: scheduler)
+        return Debounce(source: self.asObservable(), dueTime: dueTime, scheduler: scheduler)
     }
 }
 
@@ -51,7 +48,7 @@ extension ObservableType {
 extension ObservableType {
    
     /**
-    Samples the source observable sequence using a samper observable sequence producing sampling ticks.
+    Samples the source observable sequence using a sampler observable sequence producing sampling ticks.
     
     Upon each sampling tick, the latest element (if any) in the source sequence during the last sampling interval is sent to the resulting sequence.
     
@@ -62,14 +59,13 @@ extension ObservableType {
     - parameter sampler: Sampling tick sequence.
     - returns: Sampled observable sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func sample<O: ObservableType>(sampler: O)
+    public func sample<O: ObservableType>(_ sampler: O)
         -> Observable<E> {
         return Sample(source: self.asObservable(), sampler: sampler.asObservable(), onlyNew: true)
     }
 }
 
-extension Observable where Element : SignedIntegerType {
+extension Observable where Element : SignedInteger {
     /**
     Returns an observable sequence that produces a value after each period, using the specified scheduler to run timers and to send out observer messages.
 
@@ -79,8 +75,7 @@ extension Observable where Element : SignedIntegerType {
     - parameter scheduler: Scheduler to run the timer on.
     - returns: An observable sequence that produces a value after each period.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func interval(period: RxTimeInterval, scheduler: SchedulerType)
+    public static func interval(_ period: RxTimeInterval, scheduler: SchedulerType)
         -> Observable<E> {
         return Timer(dueTime: period,
             period: period,
@@ -91,7 +86,7 @@ extension Observable where Element : SignedIntegerType {
 
 // MARK: timer
 
-extension Observable where Element: SignedIntegerType {
+extension Observable where Element: SignedInteger {
     /**
     Returns an observable sequence that periodically produces a value after the specified initial relative due time has elapsed, using the specified scheduler to run timers.
 
@@ -102,8 +97,7 @@ extension Observable where Element: SignedIntegerType {
     - parameter scheduler: Scheduler to run timers on.
     - returns: An observable sequence that produces a value after due time has elapsed and then each period.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func timer(dueTime: RxTimeInterval, period: RxTimeInterval? = nil, scheduler: SchedulerType)
+    public static func timer(_ dueTime: RxTimeInterval, period: RxTimeInterval? = nil, scheduler: SchedulerType)
         -> Observable<E> {
         return Timer(
             dueTime: dueTime,
@@ -126,8 +120,7 @@ extension ObservableType {
     - parameter scheduler: Scheduler to run the timer on.
     - returns: An observable sequence with the elements taken during the specified duration from the start of the source sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func take(duration: RxTimeInterval, scheduler: SchedulerType)
+    public func take(_ duration: RxTimeInterval, scheduler: SchedulerType)
         -> Observable<E> {
         return TakeTime(source: self.asObservable(), duration: duration, scheduler: scheduler)
     }
@@ -146,8 +139,7 @@ extension ObservableType {
     - parameter scheduler: Scheduler to run the timer on.
     - returns: An observable sequence with the elements skipped during the specified duration from the start of the source sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func skip(duration: RxTimeInterval, scheduler: SchedulerType)
+    public func skip(_ duration: RxTimeInterval, scheduler: SchedulerType)
         -> Observable<E> {
         return SkipTime(source: self.asObservable(), duration: duration, scheduler: scheduler)
     }
@@ -164,7 +156,6 @@ extension ObservableType {
 
      - returns: An observable sequence that skips all elements of the source sequence.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
     public func ignoreElements()
         -> Observable<E> {
             return filter { _ -> Bool in
@@ -186,8 +177,7 @@ extension ObservableType {
     - parameter scheduler: Scheduler to run the subscription delay timer on.
     - returns: Time-shifted sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func delaySubscription(dueTime: RxTimeInterval, scheduler: SchedulerType)
+    public func delaySubscription(_ dueTime: RxTimeInterval, scheduler: SchedulerType)
         -> Observable<E> {
         return DelaySubscription(source: self.asObservable(), dueTime: dueTime, scheduler: scheduler)
     }
@@ -209,8 +199,7 @@ extension ObservableType {
     - parameter scheduler: Scheduler to run buffering timers on.
     - returns: An observable sequence of buffers.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func buffer(timeSpan timeSpan: RxTimeInterval, count: Int, scheduler: SchedulerType)
+    public func buffer(timeSpan: RxTimeInterval, count: Int, scheduler: SchedulerType)
         -> Observable<[E]> {
         return BufferTimeCount(source: self.asObservable(), timeSpan: timeSpan, count: count, scheduler: scheduler)
     }
@@ -230,8 +219,7 @@ extension ObservableType {
      - parameter scheduler: Scheduler to run windowing timers on.
      - returns: An observable sequence of windows (instances of `Observable`).
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func window(timeSpan timeSpan: RxTimeInterval, count: Int, scheduler: SchedulerType)
+    public func window(timeSpan: RxTimeInterval, count: Int, scheduler: SchedulerType)
         -> Observable<Observable<E>> {
             return WindowTimeCount(source: self.asObservable(), timeSpan: timeSpan, count: count, scheduler: scheduler)
     }
@@ -250,10 +238,9 @@ extension ObservableType {
      - parameter scheduler: Scheduler to run the timeout timer on.
      - returns: An observable sequence with a TimeoutError in case of a timeout.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func timeout(dueTime: RxTimeInterval, scheduler: SchedulerType)
+    public func timeout(_ dueTime: RxTimeInterval, scheduler: SchedulerType)
         -> Observable<E> {
-            return Timeout(source: self.asObservable(), dueTime: dueTime, other: Observable.error(RxError.Timeout), scheduler: scheduler)
+            return Timeout(source: self.asObservable(), dueTime: dueTime, other: Observable.error(RxError.timeout), scheduler: scheduler)
     }
 
     /**
@@ -266,9 +253,27 @@ extension ObservableType {
      - parameter scheduler: Scheduler to run the timeout timer on.
      - returns: The source sequence switching to the other sequence in case of a timeout.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func timeout<O: ObservableConvertibleType where E == O.E>(dueTime: RxTimeInterval, other: O, scheduler: SchedulerType)
-        -> Observable<E> {
+    public func timeout<O: ObservableConvertibleType>(_ dueTime: RxTimeInterval, other: O, scheduler: SchedulerType)
+        -> Observable<E> where E == O.E {
             return Timeout(source: self.asObservable(), dueTime: dueTime, other: other.asObservable(), scheduler: scheduler)
     }
 }
+
+// MARK: delay
+
+extension ObservableType {
+    
+    /**
+     Returns an observable sequence by the source observable sequence shifted forward in time by a specified delay. Error events from the source observable sequence are not delayed.
+     
+     - seealso: [delay operator on reactivex.io](http://reactivex.io/documentation/operators/delay.html)
+     
+     - parameter dueTime: Relative time shift of the source by.
+     - parameter scheduler: Scheduler to run the subscription delay timer on.
+     - returns: the source Observable shifted in time by the specified delay.
+     */
+    public func delay(_ dueTime: RxTimeInterval, scheduler: SchedulerType)
+        -> Observable<E> {
+            return Delay(source: self.asObservable(), dueTime: dueTime, scheduler: scheduler)
+    }
+}
diff --git a/Example/Pods/RxSwift/RxSwift/ObserverType.swift b/Example/Pods/RxSwift/RxSwift/ObserverType.swift
index 396d167..3447e5e 100644
--- a/Example/Pods/RxSwift/RxSwift/ObserverType.swift
+++ b/Example/Pods/RxSwift/RxSwift/ObserverType.swift
@@ -1,6 +1,6 @@
 //
 //  ObserverType.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/8/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,49 +8,35 @@
 
 import Foundation
 
-/**
-Supports push-style iteration over an observable sequence.
-*/
+/// Supports push-style iteration over an observable sequence.
 public protocol ObserverType {
-    /**
-    The type of elements in sequence that observer can observe.
-    */
+    /// The type of elements in sequence that observer can observe.
     associatedtype E
 
-    /**
-    Notify observer about sequence event.
-    
-    - parameter event: Event that occured.
-    */
-    func on(event: Event<E>)
+    /// Notify observer about sequence event.
+    ///
+    /// - parameter event: Event that occured.
+    func on(_ event: Event<E>)
 }
 
-/**
-Convenience API extensions to provide alternate next, error, completed events
-*/
-public extension ObserverType {
-    
-    /**
-    Convenience method equivalent to `on(.Next(element: E))`
+/// Convenience API extensions to provide alternate next, error, completed events
+extension ObserverType {
     
-    - parameter element: Next element to send to observer(s)
-    */
-    final func onNext(element: E) {
-        on(.Next(element))
+    /// Convenience method equivalent to `on(.next(element: E))`
+    ///
+    /// - parameter element: Next element to send to observer(s)
+    public final func onNext(_ element: E) {
+        on(.next(element))
     }
     
-    /**
-    Convenience method equivalent to `on(.Completed)`
-    */
-    final func onCompleted() {
-        on(.Completed)
+    /// Convenience method equivalent to `on(.completed)`
+    public final func onCompleted() {
+        on(.completed)
     }
     
-    /**
-    Convenience method equivalent to `on(.Error(error: ErrorType))`
-    - parameter error: ErrorType to send to observer(s)
-    */
-    final func onError(error: ErrorType) {
-        on(.Error(error))
+    /// Convenience method equivalent to `on(.error(Swift.Error))`
+    /// - parameter error: Swift.Error to send to observer(s)
+    public final func onError(_ error: Swift.Error) {
+        on(.error(error))
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Observers/AnonymousObserver.swift b/Example/Pods/RxSwift/RxSwift/Observers/AnonymousObserver.swift
index 6090fef..4abc816 100644
--- a/Example/Pods/RxSwift/RxSwift/Observers/AnonymousObserver.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observers/AnonymousObserver.swift
@@ -1,6 +1,6 @@
 //
 //  AnonymousObserver.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/8/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -11,24 +11,24 @@ import Foundation
 class AnonymousObserver<ElementType> : ObserverBase<ElementType> {
     typealias Element = ElementType
     
-    typealias EventHandler = Event<Element> -> Void
+    typealias EventHandler = (Event<Element>) -> Void
     
     private let _eventHandler : EventHandler
     
-    init(_ eventHandler: EventHandler) {
+    init(_ eventHandler: @escaping EventHandler) {
 #if TRACE_RESOURCES
-        AtomicIncrement(&resourceCount)
+        let _ = Resources.incrementTotal()
 #endif
         _eventHandler = eventHandler
     }
 
-    override func onCore(event: Event<Element>) {
+    override func onCore(_ event: Event<Element>) {
         return _eventHandler(event)
     }
     
 #if TRACE_RESOURCES
     deinit {
-        AtomicDecrement(&resourceCount)
+        let _ = Resources.decrementTotal()
     }
 #endif
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Observers/ObserverBase.swift b/Example/Pods/RxSwift/RxSwift/Observers/ObserverBase.swift
index 0795952..7a6ebe6 100644
--- a/Example/Pods/RxSwift/RxSwift/Observers/ObserverBase.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observers/ObserverBase.swift
@@ -1,6 +1,6 @@
 //
 //  ObserverBase.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/15/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -13,13 +13,13 @@ class ObserverBase<ElementType> : Disposable, ObserverType {
 
     private var _isStopped: AtomicInt = 0
 
-    func on(event: Event<E>) {
+    func on(_ event: Event<E>) {
         switch event {
-        case .Next:
+        case .next:
             if _isStopped == 0 {
                 onCore(event)
             }
-        case .Error, .Completed:
+        case .error, .completed:
 
             if !AtomicCompareAndSwap(0, 1, &_isStopped) {
                 return
@@ -29,11 +29,11 @@ class ObserverBase<ElementType> : Disposable, ObserverType {
         }
     }
 
-    func onCore(event: Event<E>) {
+    func onCore(_ event: Event<E>) {
         abstractMethod()
     }
 
     func dispose() {
-        _isStopped = 1
+        _ = AtomicCompareAndSwap(0, 1, &_isStopped)
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Observers/TailRecursiveSink.swift b/Example/Pods/RxSwift/RxSwift/Observers/TailRecursiveSink.swift
index eac664e..2f9464d 100644
--- a/Example/Pods/RxSwift/RxSwift/Observers/TailRecursiveSink.swift
+++ b/Example/Pods/RxSwift/RxSwift/Observers/TailRecursiveSink.swift
@@ -1,6 +1,6 @@
 //
 //  TailRecursiveSink.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/21/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,8 +9,8 @@
 import Foundation
 
 enum TailRecursiveSinkCommand {
-    case MoveNext
-    case Dispose
+    case moveNext
+    case dispose
 }
 
 #if DEBUG || TRACE_RESOURCES
@@ -18,52 +18,52 @@ enum TailRecursiveSinkCommand {
 #endif
 
 /// This class is usually used with `Generator` version of the operators.
-class TailRecursiveSink<S: SequenceType, O: ObserverType where S.Generator.Element: ObservableConvertibleType, S.Generator.Element.E == O.E>
+class TailRecursiveSink<S: Sequence, O: ObserverType>
     : Sink<O>
-    , InvocableWithValueType {
+    , InvocableWithValueType where S.Iterator.Element: ObservableConvertibleType, S.Iterator.Element.E == O.E {
     typealias Value = TailRecursiveSinkCommand
     typealias E = O.E
-    typealias SequenceGenerator = (generator: S.Generator, remaining: IntMax?)
+    typealias SequenceGenerator = (generator: S.Iterator, remaining: IntMax?)
 
     var _generators: [SequenceGenerator] = []
-    var _disposed = false
+    var _isDisposed = false
     var _subscription = SerialDisposable()
 
     // this is thread safe object
     var _gate = AsyncLock<InvocableScheduledItem<TailRecursiveSink<S, O>>>()
 
-    override init(observer: O) {
-        super.init(observer: observer)
+    override init(observer: O, cancel: Cancelable) {
+        super.init(observer: observer, cancel: cancel)
     }
 
-    func run(sources: SequenceGenerator) -> Disposable {
+    func run(_ sources: SequenceGenerator) -> Disposable {
         _generators.append(sources)
 
-        schedule(.MoveNext)
+        schedule(.moveNext)
 
         return _subscription
     }
 
-    func invoke(command: TailRecursiveSinkCommand) {
+    func invoke(_ command: TailRecursiveSinkCommand) {
         switch command {
-        case .Dispose:
+        case .dispose:
             disposeCommand()
-        case .MoveNext:
+        case .moveNext:
             moveNextCommand()
         }
     }
 
     // simple implementation for now
-    func schedule(command: TailRecursiveSinkCommand) {
+    func schedule(_ command: TailRecursiveSinkCommand) {
         _gate.invoke(InvocableScheduledItem(invocable: self, state: command))
     }
 
     func done() {
-        forwardOn(.Completed)
+        forwardOn(.completed)
         dispose()
     }
 
-    func extract(observable: Observable<E>) -> SequenceGenerator? {
+    func extract(_ observable: Observable<E>) -> SequenceGenerator? {
         abstractMethod()
     }
 
@@ -77,7 +77,7 @@ class TailRecursiveSink<S: SequenceType, O: ObserverType where S.Generator.Eleme
                 break
             }
             
-            if _disposed {
+            if _isDisposed {
                 return
             }
 
@@ -129,16 +129,16 @@ class TailRecursiveSink<S: SequenceType, O: ObserverType where S.Generator.Eleme
 
         let disposable = SingleAssignmentDisposable()
         _subscription.disposable = disposable
-        disposable.disposable = subscribeToNext(next!)
+        disposable.setDisposable(subscribeToNext(next!))
     }
 
-    func subscribeToNext(source: Observable<E>) -> Disposable {
+    func subscribeToNext(_ source: Observable<E>) -> Disposable {
         abstractMethod()
     }
 
     func disposeCommand() {
-        _disposed = true
-        _generators.removeAll(keepCapacity: false)
+        _isDisposed = true
+        _generators.removeAll(keepingCapacity: false)
     }
 
     override func dispose() {
@@ -146,7 +146,7 @@ class TailRecursiveSink<S: SequenceType, O: ObserverType where S.Generator.Eleme
         
         _subscription.dispose()
         
-        schedule(.Dispose)
+        schedule(.dispose)
     }
 }
 
diff --git a/Example/Pods/RxSwift/RxSwift/Platform/Platform.Darwin.swift b/Example/Pods/RxSwift/RxSwift/Platform/Platform.Darwin.swift
deleted file mode 100644
index 4f1cf44..0000000
--- a/Example/Pods/RxSwift/RxSwift/Platform/Platform.Darwin.swift
+++ /dev/null
@@ -1,45 +0,0 @@
-//
-//  Platform.Darwin.swift
-//  Rx
-//
-//  Created by Krunoslav Zaher on 12/29/15.
-//  Copyright © 2015 Krunoslav Zaher. All rights reserved.
-//
-
-#if os(OSX) || os(iOS) || os(tvOS) || os(watchOS)
-
-    import Darwin
-    import Foundation
-
-    #if TRACE_RESOURCES
-    public typealias AtomicInt = Int32
-    #else
-    typealias AtomicInt = Int32
-    #endif
-
-    let AtomicCompareAndSwap = OSAtomicCompareAndSwap32
-    let AtomicIncrement = OSAtomicIncrement32
-    let AtomicDecrement = OSAtomicDecrement32
-
-    extension NSThread {
-        static func setThreadLocalStorageValue<T: AnyObject>(value: T?, forKey key: protocol<AnyObject, NSCopying>) {
-            let currentThread = NSThread.currentThread()
-            let threadDictionary = currentThread.threadDictionary
-
-            if let newValue = value {
-                threadDictionary.setObject(newValue, forKey: key)
-            }
-            else {
-                threadDictionary.removeObjectForKey(key)
-            }
-
-        }
-        static func getThreadLocalStorageValueForKey<T>(key: protocol<AnyObject, NSCopying>) -> T? {
-            let currentThread = NSThread.currentThread()
-            let threadDictionary = currentThread.threadDictionary
-            
-            return threadDictionary[key] as? T
-        }
-    }
-    
-#endif
diff --git a/Example/Pods/RxSwift/RxSwift/Platform/Platform.Linux.swift b/Example/Pods/RxSwift/RxSwift/Platform/Platform.Linux.swift
deleted file mode 100644
index f5b9368..0000000
--- a/Example/Pods/RxSwift/RxSwift/Platform/Platform.Linux.swift
+++ /dev/null
@@ -1,222 +0,0 @@
-//
-//  Platform.Linux.swift
-//  Rx
-//
-//  Created by Krunoslav Zaher on 12/29/15.
-//  Copyright © 2015 Krunoslav Zaher. All rights reserved.
-//
-
-#if os(Linux)
-    ////////////////////////////////////////////////////////////////////////////////
-    // This is not the greatest API in the world, this is just a tribute.
-    // !!! Proof of concept until libdispatch becomes operational. !!!
-    ////////////////////////////////////////////////////////////////////////////////
-
-    import Foundation
-    import XCTest
-    import Glibc
-    import SwiftShims
-
-    // MARK: CoreFoundation run loop mock
-
-    public typealias CFRunLoopRef = Int
-    public let kCFRunLoopDefaultMode = "CFRunLoopDefaultMode"
-
-    typealias Action = () -> ()
-
-    var queue = Queue<Action>(capacity: 100)
-
-    var runLoopCounter = 0
-
-    extension NSThread {
-        public var isMainThread: Bool {
-            return true
-        }
-    }
-
-    public func CFRunLoopWakeUp(runLoop: CFRunLoopRef) {
-    }
-
-    public func CFRunLoopStop(runLoop: CFRunLoopRef) {
-        runLoopCounter -= 1
-    }
-
-    public func CFRunLoopPerformBlock(runLoop: CFRunLoopRef, _ mode: String, _ action: () -> ()) {
-        queue.enqueue(action)
-    }
-
-    public func CFRunLoopRun() {
-        runLoopCounter += 1
-        let currentValueOfCounter = runLoopCounter
-        while let front = queue.dequeue() {
-            front()
-            if runLoopCounter < currentValueOfCounter - 1 {
-                fatalError("called stop twice")
-            }
-
-            if runLoopCounter == currentValueOfCounter - 1 {
-                break
-            }
-        }
-    }
-
-    public func CFRunLoopGetCurrent() -> CFRunLoopRef {
-        return 0
-    }
-
-    // MARK: Atomic, just something that works for single thread case
-
-    #if TRACE_RESOURCES
-    public typealias AtomicInt = Int64
-    #else
-    typealias AtomicInt = Int64
-    #endif
-
-    func AtomicIncrement(increment: UnsafeMutablePointer<AtomicInt>) -> AtomicInt {
-        increment.memory = increment.memory + 1
-        return increment.memory
-    }
-
-    func AtomicDecrement(increment: UnsafeMutablePointer<AtomicInt>) -> AtomicInt {
-        increment.memory = increment.memory - 1
-        return increment.memory
-    }
-
-    func AtomicCompareAndSwap(l: AtomicInt, _ r: AtomicInt, _ target: UnsafeMutablePointer<AtomicInt>) -> Bool {
-        //return __sync_val_compare_and_swap(target, l, r)
-        if target.memory == l {
-            target.memory = r
-            return true
-        }
-
-        return false
-    }
-
-    extension NSThread {
-        static func setThreadLocalStorageValue<T: AnyObject>(value: T?, forKey key: String) {
-            let currentThread = NSThread.currentThread()
-            var threadDictionary = currentThread.threadDictionary
-
-            if let newValue = value {
-                threadDictionary[key] = newValue
-            }
-            else {
-                threadDictionary[key] = nil
-            }
-
-            currentThread.threadDictionary = threadDictionary
-        }
-
-        static func getThreadLocalStorageValueForKey<T: AnyObject>(key: String) -> T? {
-            let currentThread = NSThread.currentThread()
-            let threadDictionary = currentThread.threadDictionary
-
-            return threadDictionary[key] as? T
-        }
-    }
-
-    //
-
-    // MARK: objc mock
-
-    public func objc_sync_enter(lock: AnyObject) {
-    }
-
-    public func objc_sync_exit(lock: AnyObject) {
-
-    }
-
-
-    // MARK: libdispatch
-
-    public typealias dispatch_time_t = Int
-    public typealias dispatch_source_t = Int
-    public typealias dispatch_source_type_t = Int
-    public typealias dispatch_queue_t = Int
-    public typealias dispatch_object_t = Int
-    public typealias dispatch_block_t = () -> ()
-    public typealias dispatch_queue_attr_t = Int
-    public typealias qos_class_t = Int
-
-    public let DISPATCH_QUEUE_SERIAL = 0
-
-    public let DISPATCH_QUEUE_PRIORITY_HIGH = 1
-    public let DISPATCH_QUEUE_PRIORITY_DEFAULT = 2
-    public let DISPATCH_QUEUE_PRIORITY_LOW = 3
-
-    public let QOS_CLASS_USER_INTERACTIVE = 0
-    public let QOS_CLASS_USER_INITIATED = 1
-    public let QOS_CLASS_DEFAULT = 2
-    public let QOS_CLASS_UTILITY = 3
-    public let QOS_CLASS_BACKGROUND = 4
-
-    public let DISPATCH_SOURCE_TYPE_TIMER = 0
-    public let DISPATCH_TIME_FOREVER = 1 as UInt64
-    public let NSEC_PER_SEC = 1
-
-    public let DISPATCH_TIME_NOW = -1
-
-    public func dispatch_time(when: dispatch_time_t, _ delta: Int64) -> dispatch_time_t {
-        return when + Int(delta)
-    }
-
-    public func dispatch_queue_create(label: UnsafePointer<Int8>, _ attr: dispatch_queue_attr_t!) -> dispatch_queue_t! {
-        return 0
-    }
-
-    public func dispatch_set_target_queue(object: dispatch_object_t!, _ queue: dispatch_queue_t!) {
-    }
-
-    public func dispatch_async(queue2: dispatch_queue_t, _ block: dispatch_block_t) {
-        queue.enqueue(block)
-    }
-
-    public func dispatch_source_create(type: dispatch_source_type_t, _ handle: UInt, _ mask: UInt, _ queue: dispatch_queue_t!) -> dispatch_source_t! {
-        return 0
-    }
-
-    public func dispatch_source_set_timer(source: dispatch_source_t, _ start: dispatch_time_t, _ interval: UInt64, _ leeway: UInt64) {
-
-    }
-
-    public func dispatch_source_set_event_handler(source: dispatch_source_t, _ handler: dispatch_block_t!) {
-        queue.enqueue(handler)
-    }
-
-    public func dispatch_resume(object: dispatch_object_t) {
-    }
-
-    public func dispatch_source_cancel(source: dispatch_source_t) {
-    }
-
-    public func dispatch_get_global_queue(identifier: Int, _ flags: UInt) -> dispatch_queue_t! {
-        return 0
-    }
-
-    public func dispatch_get_main_queue() -> dispatch_queue_t! {
-        return 0
-    }
-
-    // MARK: XCTest
-
-    public class Expectation {
-        public func fulfill() {
-        }
-    }
-
-    extension XCTestCase {
-        public func setUp() {
-        }
-
-        public func tearDown() {
-        }
-
-        public func expectationWithDescription(description: String) -> Expectation {
-            return Expectation()
-        }
-
-        public func waitForExpectationsWithTimeout(time: NSTimeInterval, action: ErrorType? -> Void) {
-        }
-    }
-
-#endif
diff --git a/Example/Pods/RxSwift/RxSwift/Reactive.swift b/Example/Pods/RxSwift/RxSwift/Reactive.swift
new file mode 100644
index 0000000..57ecab7
--- /dev/null
+++ b/Example/Pods/RxSwift/RxSwift/Reactive.swift
@@ -0,0 +1,74 @@
+//
+//  Reactive.swift
+//  RxSwift
+//
+//  Created by Yury Korolev on 5/2/16.
+//  Copyright © 2016 Krunoslav Zaher. All rights reserved.
+//
+
+/**
+ Use `Reactive` proxy as customization point for constrained protocol extensions.
+
+ General pattern would be:
+
+ // 1. Extend Reactive protocol with constrain on Base
+ // Read as: Reactive Extension where Base is a SomeType
+ extension Reactive where Base: SomeType {
+ // 2. Put any specific reactive extension for SomeType here
+ }
+
+ With this approach we can have more specialized methods and properties using
+ `Base` and not just specialized on common base type.
+
+ */
+
+public struct Reactive<Base> {
+    /// Base object to extend.
+    public let base: Base
+
+    /// Creates extensions with base object.
+    ///
+    /// - parameter base: Base object.
+    public init(_ base: Base) {
+        self.base = base
+    }
+}
+
+/// A type that has reactive extensions.
+public protocol ReactiveCompatible {
+    /// Extended type
+    associatedtype CompatibleType
+
+    /// Reactive extensions.
+    static var rx: Reactive<CompatibleType>.Type { get set }
+
+    /// Reactive extensions.
+    var rx: Reactive<CompatibleType> { get set }
+}
+
+extension ReactiveCompatible {
+    /// Reactive extensions.
+    public static var rx: Reactive<Self>.Type {
+        get {
+            return Reactive<Self>.self
+        }
+        set {
+            // this enables using Reactive to "mutate" base type
+        }
+    }
+
+    /// Reactive extensions.
+    public var rx: Reactive<Self> {
+        get {
+            return Reactive(self)
+        }
+        set {
+            // this enables using Reactive to "mutate" base object
+        }
+    }
+}
+
+import Foundation
+
+/// Extend NSObject with `rx` proxy.
+extension NSObject: ReactiveCompatible { }
diff --git a/Example/Pods/RxSwift/RxSwift/Rx.swift b/Example/Pods/RxSwift/RxSwift/Rx.swift
index 8e33574..18a99b1 100644
--- a/Example/Pods/RxSwift/RxSwift/Rx.swift
+++ b/Example/Pods/RxSwift/RxSwift/Rx.swift
@@ -1,6 +1,6 @@
 //
 //  Rx.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/14/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -9,34 +9,53 @@
 import Foundation
 
 #if TRACE_RESOURCES
-/// Counts internal Rx resource allocations (Observables, Observers, Disposables, etc.). This provides a simple way to detect leaks during development.
-public var resourceCount: AtomicInt = 0
+    fileprivate var resourceCount: AtomicInt = 0
+
+    /// Resource utilization information
+    public struct Resources {
+        /// Counts internal Rx resource allocations (Observables, Observers, Disposables, etc.). This provides a simple way to detect leaks during development.
+        public static var total: Int32 {
+            return resourceCount.valueSnapshot()
+        }
+
+        /// Increments `Resources.total` resource count.
+        ///
+        /// - returns: New resource count
+        public static func incrementTotal() -> Int32 {
+            return AtomicIncrement(&resourceCount)
+        }
+
+        /// Decrements `Resources.total` resource count
+        ///
+        /// - returns: New resource count
+        public static func decrementTotal() -> Int32 {
+            return AtomicDecrement(&resourceCount)
+        }
+    }
 #endif
 
 /// Swift does not implement abstract methods. This method is used as a runtime check to ensure that methods which intended to be abstract (i.e., they should be implemented in subclasses) are not called directly on the superclass.
-@noreturn func abstractMethod() -> Void {
+func abstractMethod() -> Swift.Never {
     rxFatalError("Abstract method")
 }
 
-@noreturn func rxFatalError(lastMessage: String) {
+func rxFatalError(_ lastMessage: String) -> Swift.Never  {
     // The temptation to comment this line is great, but please don't, it's for your own good. The choice is yours.
     fatalError(lastMessage)
 }
 
-func incrementChecked(inout i: Int) throws -> Int {
+func incrementChecked(_ i: inout Int) throws -> Int {
     if i == Int.max {
-        throw RxError.Overflow
+        throw RxError.overflow
     }
-    let result = i
-    i += 1
-    return result
+    defer { i += 1 }
+    return i
 }
 
-func decrementChecked(inout i: Int) throws -> Int {
+func decrementChecked(_ i: inout Int) throws -> Int {
     if i == Int.min {
-        throw RxError.Overflow
+        throw RxError.overflow
     }
-    let result = i
-    i -= 1
-    return result
+    defer { i -= 1 }
+    return i
 }
diff --git a/Example/Pods/RxSwift/RxSwift/RxMutableBox.swift b/Example/Pods/RxSwift/RxSwift/RxMutableBox.swift
index 83ff9f7..7606b99 100644
--- a/Example/Pods/RxSwift/RxSwift/RxMutableBox.swift
+++ b/Example/Pods/RxSwift/RxSwift/RxMutableBox.swift
@@ -8,29 +8,21 @@
 
 import Foundation
 
-/**
-Creates mutable reference wrapper for any type.
-*/
+/// Creates mutable reference wrapper for any type.
 class RxMutableBox<T> : CustomDebugStringConvertible {
-    /**
-    Wrapped value
-    */
+    /// Wrapped value
     var value : T
     
-    /**
-    Creates reference wrapper for `value`.
-    
-    - parameter value: Value to wrap.
-    */
+    /// Creates reference wrapper for `value`.
+    ///
+    /// - parameter value: Value to wrap.
     init (_ value: T) {
         self.value = value
     }
 }
 
 extension RxMutableBox {
-    /**
-    - returns: Box description.
-    */
+    /// - returns: Box description.
     var debugDescription: String {
         return "MutatingBox(\(self.value))"
     }
diff --git a/Example/Pods/RxSwift/RxSwift/SchedulerType.swift b/Example/Pods/RxSwift/RxSwift/SchedulerType.swift
index 1c3a20c..3c329ba 100644
--- a/Example/Pods/RxSwift/RxSwift/SchedulerType.swift
+++ b/Example/Pods/RxSwift/RxSwift/SchedulerType.swift
@@ -1,6 +1,6 @@
 //
 //  SchedulerType.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/8/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,24 +8,16 @@
 
 import Foundation
 
-/**
-Type that represents time interval in the context of RxSwift.
-*/
-public typealias RxTimeInterval = NSTimeInterval
+// Type that represents time interval in the context of RxSwift.
+public typealias RxTimeInterval = TimeInterval
 
-/**
-Type that represents absolute time in the context of RxSwift.
-*/
-public typealias RxTime = NSDate
+/// Type that represents absolute time in the context of RxSwift.
+public typealias RxTime = Date
 
-/**
-Represents an object that schedules units of work.
-*/
+/// Represents an object that schedules units of work.
 public protocol SchedulerType: ImmediateSchedulerType {
 
-    /**
-    - returns: Current time.
-    */
+    /// - returns: Current time.
     var now : RxTime {
         get
     }
@@ -38,7 +30,7 @@ public protocol SchedulerType: ImmediateSchedulerType {
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    func scheduleRelative<StateType>(state: StateType, dueTime: RxTimeInterval, action: (StateType) -> Disposable) -> Disposable
+    func scheduleRelative<StateType>(_ state: StateType, dueTime: RxTimeInterval, action: @escaping (StateType) -> Disposable) -> Disposable
  
     /**
     Schedules a periodic piece of work.
@@ -49,7 +41,7 @@ public protocol SchedulerType: ImmediateSchedulerType {
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    func schedulePeriodic<StateType>(state: StateType, startAfter: RxTimeInterval, period: RxTimeInterval, action: (StateType) -> StateType) -> Disposable
+    func schedulePeriodic<StateType>(_ state: StateType, startAfter: RxTimeInterval, period: RxTimeInterval, action: @escaping (StateType) -> StateType) -> Disposable
 }
 
 extension SchedulerType {
@@ -62,17 +54,17 @@ extension SchedulerType {
     - parameter period: Period for running the work periodically.
     - returns: The disposable object used to cancel the scheduled recurring action (best effort).
     */
-    public func schedulePeriodic<StateType>(state: StateType, startAfter: RxTimeInterval, period: RxTimeInterval, action: (StateType) -> StateType) -> Disposable {
+    public func schedulePeriodic<StateType>(_ state: StateType, startAfter: RxTimeInterval, period: RxTimeInterval, action: @escaping (StateType) -> StateType) -> Disposable {
         let schedule = SchedulePeriodicRecursive(scheduler: self, startAfter: startAfter, period: period, action: action, state: state)
             
         return schedule.start()
     }
 
-    func scheduleRecursive<State>(state: State, dueTime: RxTimeInterval, action: (state: State, scheduler: AnyRecursiveScheduler<State>) -> ()) -> Disposable {
+    func scheduleRecursive<State>(_ state: State, dueTime: RxTimeInterval, action: @escaping (State, AnyRecursiveScheduler<State>) -> ()) -> Disposable {
         let scheduler = AnyRecursiveScheduler(scheduler: self, action: action)
          
         scheduler.schedule(state, dueTime: dueTime)
             
-        return AnonymousDisposable(scheduler.dispose)
+        return Disposables.create(with: scheduler.dispose)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/ConcurrentDispatchQueueScheduler.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/ConcurrentDispatchQueueScheduler.swift
index 41cebae..f4c202b 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/ConcurrentDispatchQueueScheduler.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/ConcurrentDispatchQueueScheduler.swift
@@ -7,54 +7,42 @@
 //
 
 import Foundation
+import Dispatch
 
-/**
-Abstracts the work that needs to be performed on a specific `dispatch_queue_t`. You can also pass a serial dispatch queue, it shouldn't cause any problems.
-
-This scheduler is suitable when some work needs to be performed in background.
-*/
+/// Abstracts the work that needs to be performed on a specific `dispatch_queue_t`. You can also pass a serial dispatch queue, it shouldn't cause any problems.
+///
+/// This scheduler is suitable when some work needs to be performed in background.
 public class ConcurrentDispatchQueueScheduler: SchedulerType {
-    public typealias TimeInterval = NSTimeInterval
-    public typealias Time = NSDate
-    
-    private let _queue : dispatch_queue_t
+    public typealias TimeInterval = Foundation.TimeInterval
+    public typealias Time = Date
     
-    public var now : NSDate {
-        return NSDate()
+    public var now : Date {
+        return Date()
     }
+
+    let configuration: DispatchQueueConfiguration
     
-    // leeway for scheduling timers
-    private var _leeway: Int64 = 0
-    
-    /**
-    Constructs new `ConcurrentDispatchQueueScheduler` that wraps `queue`.
-    
-    - parameter queue: Target dispatch queue.
-    */
-    public init(queue: dispatch_queue_t) {
-        _queue = queue
+    /// Constructs new `ConcurrentDispatchQueueScheduler` that wraps `queue`.
+    ///
+    /// - parameter queue: Target dispatch queue.
+    public init(queue: DispatchQueue, leeway: DispatchTimeInterval = DispatchTimeInterval.nanoseconds(0)) {
+        configuration = DispatchQueueConfiguration(queue: queue, leeway: leeway)
     }
     
-    /**
-     Convenience init for scheduler that wraps one of the global concurrent dispatch queues.
-     
-     - parameter globalConcurrentQueueQOS: Target global dispatch queue, by quality of service class.
-     */
+    /// Convenience init for scheduler that wraps one of the global concurrent dispatch queues.
+    ///
+    /// - parameter qos: Target global dispatch queue, by quality of service class.
     @available(iOS 8, OSX 10.10, *)
-    public convenience init(globalConcurrentQueueQOS: DispatchQueueSchedulerQOS) {
-        let priority = globalConcurrentQueueQOS.QOSClass
-        self.init(queue: dispatch_get_global_queue(priority, UInt(0)))
+    public convenience init(qos: DispatchQoS, leeway: DispatchTimeInterval = DispatchTimeInterval.nanoseconds(0)) {
+        self.init(queue: DispatchQueue(
+            label: "rxswift.queue.\(qos)",
+            qos: qos,
+            attributes: [DispatchQueue.Attributes.concurrent],
+            target: nil),
+            leeway: leeway
+        )
     }
 
-    
-    class func convertTimeIntervalToDispatchInterval(timeInterval: NSTimeInterval) -> Int64 {
-        return Int64(timeInterval * Double(NSEC_PER_SEC))
-    }
-    
-    class func convertTimeIntervalToDispatchTime(timeInterval: NSTimeInterval) -> dispatch_time_t {
-        return dispatch_time(DISPATCH_TIME_NOW, convertTimeIntervalToDispatchInterval(timeInterval))
-    }
-    
     /**
     Schedules an action to be executed immediatelly.
     
@@ -62,22 +50,8 @@ public class ConcurrentDispatchQueueScheduler: SchedulerType {
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    public final func schedule<StateType>(state: StateType, action: StateType -> Disposable) -> Disposable {
-        return self.scheduleInternal(state, action: action)
-    }
-    
-    func scheduleInternal<StateType>(state: StateType, action: StateType -> Disposable) -> Disposable {
-        let cancel = SingleAssignmentDisposable()
-        
-        dispatch_async(_queue) {
-            if cancel.disposed {
-                return
-            }
-            
-            cancel.disposable = action(state)
-        }
-        
-        return cancel
+    public final func schedule<StateType>(_ state: StateType, action: @escaping (StateType) -> Disposable) -> Disposable {
+        return self.configuration.schedule(state, action: action)
     }
     
     /**
@@ -88,27 +62,8 @@ public class ConcurrentDispatchQueueScheduler: SchedulerType {
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    public final func scheduleRelative<StateType>(state: StateType, dueTime: NSTimeInterval, action: (StateType) -> Disposable) -> Disposable {
-        let timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, _queue)
-        
-        let dispatchInterval = MainScheduler.convertTimeIntervalToDispatchTime(dueTime)
-        
-        let compositeDisposable = CompositeDisposable()
-        
-        dispatch_source_set_timer(timer, dispatchInterval, DISPATCH_TIME_FOREVER, 0)
-        dispatch_source_set_event_handler(timer, {
-            if compositeDisposable.disposed {
-                return
-            }
-           compositeDisposable.addDisposable(action(state))
-        })
-        dispatch_resume(timer)
-        
-        compositeDisposable.addDisposable(AnonymousDisposable {
-            dispatch_source_cancel(timer)
-            })
-        
-        return compositeDisposable
+    public final func scheduleRelative<StateType>(_ state: StateType, dueTime: Foundation.TimeInterval, action: @escaping (StateType) -> Disposable) -> Disposable {
+        return self.configuration.scheduleRelative(state, dueTime: dueTime, action: action)
     }
     
     /**
@@ -120,28 +75,7 @@ public class ConcurrentDispatchQueueScheduler: SchedulerType {
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    public func schedulePeriodic<StateType>(state: StateType, startAfter: TimeInterval, period: TimeInterval, action: (StateType) -> StateType) -> Disposable {
-        let timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, _queue)
-        
-        let initial = MainScheduler.convertTimeIntervalToDispatchTime(startAfter)
-        let dispatchInterval = MainScheduler.convertTimeIntervalToDispatchInterval(period)
-        
-        var timerState = state
-        
-        let validDispatchInterval = dispatchInterval < 0 ? 0 : UInt64(dispatchInterval)
-        
-        dispatch_source_set_timer(timer, initial, validDispatchInterval, 0)
-        let cancel = AnonymousDisposable {
-            dispatch_source_cancel(timer)
-        }
-        dispatch_source_set_event_handler(timer, {
-            if cancel.disposed {
-                return
-            }
-            timerState = action(timerState)
-        })
-        dispatch_resume(timer)
-        
-        return cancel
+    public func schedulePeriodic<StateType>(_ state: StateType, startAfter: TimeInterval, period: TimeInterval, action: @escaping (StateType) -> StateType) -> Disposable {
+        return self.configuration.schedulePeriodic(state, startAfter: startAfter, period: period, action: action)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/ConcurrentMainScheduler.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/ConcurrentMainScheduler.swift
index c26be80..6feaedd 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/ConcurrentMainScheduler.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/ConcurrentMainScheduler.swift
@@ -1,12 +1,13 @@
 //
 //  ConcurrentMainScheduler.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 10/17/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
 //
 
 import Foundation
+import Dispatch
 
 /**
 Abstracts work that needs to be performed on `MainThread`. In case `schedule` methods are called from main thread, it will perform action immediately without scheduling.
@@ -15,27 +16,23 @@ This scheduler is optimized for `subscribeOn` operator. If you want to observe o
 `MainScheduler` is more suitable for that purpose.
 */
 public final class ConcurrentMainScheduler : SchedulerType {
-    public typealias TimeInterval = NSTimeInterval
-    public typealias Time = NSDate
+    public typealias TimeInterval = Foundation.TimeInterval
+    public typealias Time = Date
 
     private let _mainScheduler: MainScheduler
-    private let _mainQueue: dispatch_queue_t
+    private let _mainQueue: DispatchQueue
 
-    /**
-    - returns: Current time.
-    */
-    public var now : NSDate {
-        return _mainScheduler.now
+    /// - returns: Current time.
+    public var now : Date {
+        return _mainScheduler.now as Date
     }
 
     private init(mainScheduler: MainScheduler) {
-        _mainQueue = dispatch_get_main_queue()
+        _mainQueue = DispatchQueue.main
         _mainScheduler = mainScheduler
     }
 
-    /**
-    Singleton instance of `ConcurrentMainScheduler`
-    */
+    /// Singleton instance of `ConcurrentMainScheduler`
     public static let instance = ConcurrentMainScheduler(mainScheduler: MainScheduler.instance)
 
     /**
@@ -45,19 +42,19 @@ public final class ConcurrentMainScheduler : SchedulerType {
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    public func schedule<StateType>(state: StateType, action: (StateType) -> Disposable) -> Disposable {
-        if NSThread.currentThread().isMainThread {
+    public func schedule<StateType>(_ state: StateType, action: @escaping (StateType) -> Disposable) -> Disposable {
+        if DispatchQueue.isMain {
             return action(state)
         }
 
         let cancel = SingleAssignmentDisposable()
 
-        dispatch_async(_mainQueue) {
-            if cancel.disposed {
+        _mainQueue.async {
+            if cancel.isDisposed {
                 return
             }
 
-            cancel.disposable = action(state)
+            cancel.setDisposable(action(state))
         }
 
         return cancel
@@ -71,7 +68,7 @@ public final class ConcurrentMainScheduler : SchedulerType {
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    public final func scheduleRelative<StateType>(state: StateType, dueTime: NSTimeInterval, action: (StateType) -> Disposable) -> Disposable {
+    public final func scheduleRelative<StateType>(_ state: StateType, dueTime: Foundation.TimeInterval, action: @escaping (StateType) -> Disposable) -> Disposable {
         return _mainScheduler.scheduleRelative(state, dueTime: dueTime, action: action)
     }
 
@@ -84,7 +81,7 @@ public final class ConcurrentMainScheduler : SchedulerType {
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    public func schedulePeriodic<StateType>(state: StateType, startAfter: TimeInterval, period: TimeInterval, action: (StateType) -> StateType) -> Disposable {
+    public func schedulePeriodic<StateType>(_ state: StateType, startAfter: TimeInterval, period: TimeInterval, action: @escaping (StateType) -> StateType) -> Disposable {
         return _mainScheduler.schedulePeriodic(state, startAfter: startAfter, period: period, action: action)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/CurrentThreadScheduler.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/CurrentThreadScheduler.swift
index 9b92122..8a49ce0 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/CurrentThreadScheduler.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/CurrentThreadScheduler.swift
@@ -1,93 +1,49 @@
 //
 //  CurrentThreadScheduler.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 8/30/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
 //
 
 import Foundation
+import Dispatch
 
-#if os(Linux)
-  let CurrentThreadSchedulerKeyInstance       = "RxSwift.CurrentThreadScheduler.SchedulerKey"
-  let CurrentThreadSchedulerQueueKeyInstance  = "RxSwift.CurrentThreadScheduler.Queue"
+let CurrentThreadSchedulerKeyInstance       = "RxSwift.CurrentThreadScheduler.SchedulerKey"
+let CurrentThreadSchedulerQueueKeyInstance  = "RxSwift.CurrentThreadScheduler.Queue"
 
-  typealias CurrentThreadSchedulerValue       = NSString
-  let CurrentThreadSchedulerValueInstance     = "RxSwift.CurrentThreadScheduler.SchedulerKey" as NSString
-#else
-  let CurrentThreadSchedulerKeyInstance       = CurrentThreadSchedulerKey()
-  let CurrentThreadSchedulerQueueKeyInstance  = CurrentThreadSchedulerQueueKey()
+typealias CurrentThreadSchedulerValue       = NSString
+let CurrentThreadSchedulerValueInstance     = "RxSwift.CurrentThreadScheduler.SchedulerKey" as NSString
 
-  typealias CurrentThreadSchedulerValue       = CurrentThreadSchedulerKey
-  let CurrentThreadSchedulerValueInstance     = CurrentThreadSchedulerKeyInstance
 
-  class CurrentThreadSchedulerKey : NSObject, NSCopying {
-      override func isEqual(object: AnyObject?) -> Bool {
-          return object === CurrentThreadSchedulerKeyInstance
-      }
-
-      override var hash: Int { return -904739208 }
-
-      override func copy() -> AnyObject {
-          return CurrentThreadSchedulerKeyInstance
-      }
-
-      func copyWithZone(zone: NSZone) -> AnyObject {
-          return CurrentThreadSchedulerKeyInstance
-      }
-  }
-
-  class CurrentThreadSchedulerQueueKey : NSObject, NSCopying {
-      override func isEqual(object: AnyObject?) -> Bool {
-          return object === CurrentThreadSchedulerQueueKeyInstance
-      }
-
-      override var hash: Int { return -904739207 }
-
-      override func copy() -> AnyObject {
-          return CurrentThreadSchedulerQueueKeyInstance
-      }
-
-      func copyWithZone(zone: NSZone) -> AnyObject {
-          return CurrentThreadSchedulerQueueKeyInstance
-      }
-  }
-#endif
-
-/**
-Represents an object that schedules units of work on the current thread.
-
-This is the default scheduler for operators that generate elements.
-
-This scheduler is also sometimes called `trampoline scheduler`.
-*/
+/// Represents an object that schedules units of work on the current thread.
+///
+/// This is the default scheduler for operators that generate elements.
+///
+/// This scheduler is also sometimes called `trampoline scheduler`.
 public class CurrentThreadScheduler : ImmediateSchedulerType {
     typealias ScheduleQueue = RxMutableBox<Queue<ScheduledItemType>>
 
-    /**
-    The singleton instance of the current thread scheduler.
-    */
+    /// The singleton instance of the current thread scheduler.
     public static let instance = CurrentThreadScheduler()
 
     static var queue : ScheduleQueue? {
         get {
-            return NSThread.getThreadLocalStorageValueForKey(CurrentThreadSchedulerQueueKeyInstance)
+            return Thread.getThreadLocalStorageValueForKey(CurrentThreadSchedulerQueueKeyInstance)
         }
         set {
-            NSThread.setThreadLocalStorageValue(newValue, forKey: CurrentThreadSchedulerQueueKeyInstance)
+            Thread.setThreadLocalStorageValue(newValue, forKey: CurrentThreadSchedulerQueueKeyInstance)
         }
     }
 
-    /**
-    Gets a value that indicates whether the caller must call a `schedule` method.
-    */
-    public static private(set) var isScheduleRequired: Bool {
+    /// Gets a value that indicates whether the caller must call a `schedule` method.
+    public static fileprivate(set) var isScheduleRequired: Bool {
         get {
-            let value: CurrentThreadSchedulerValue? = NSThread.getThreadLocalStorageValueForKey(CurrentThreadSchedulerKeyInstance)
+            let value: CurrentThreadSchedulerValue? = Thread.getThreadLocalStorageValueForKey(CurrentThreadSchedulerKeyInstance)
             return value == nil
         }
         set(isScheduleRequired) {
-            NSThread.setThreadLocalStorageValue(isScheduleRequired ? nil : CurrentThreadSchedulerValueInstance, forKey: CurrentThreadSchedulerKeyInstance)
+            Thread.setThreadLocalStorageValue(isScheduleRequired ? nil : CurrentThreadSchedulerValueInstance, forKey: CurrentThreadSchedulerKeyInstance)
         }
     }
 
@@ -101,7 +57,7 @@ public class CurrentThreadScheduler : ImmediateSchedulerType {
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    public func schedule<StateType>(state: StateType, action: (StateType) -> Disposable) -> Disposable {
+    public func schedule<StateType>(_ state: StateType, action: @escaping (StateType) -> Disposable) -> Disposable {
         if CurrentThreadScheduler.isScheduleRequired {
             CurrentThreadScheduler.isScheduleRequired = false
 
@@ -117,7 +73,7 @@ public class CurrentThreadScheduler : ImmediateSchedulerType {
             }
 
             while let latest = queue.value.dequeue() {
-                if latest.disposed {
+                if latest.isDisposed {
                     continue
                 }
                 latest.invoke()
@@ -139,9 +95,7 @@ public class CurrentThreadScheduler : ImmediateSchedulerType {
 
         let scheduledItem = ScheduledItem(action: action, state: state)
         queue.value.enqueue(scheduledItem)
-        
-        // In Xcode 7.3, `return scheduledItem` causes segmentation fault 11 on release build.
-        // To workaround this compiler issue, returns AnonymousDisposable that disposes scheduledItem.
-        return AnonymousDisposable(scheduledItem.dispose)
+
+        return scheduledItem
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/DispatchQueueSchedulerQOS.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/DispatchQueueSchedulerQOS.swift
deleted file mode 100644
index 571f6bf..0000000
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/DispatchQueueSchedulerQOS.swift
+++ /dev/null
@@ -1,54 +0,0 @@
-//
-//  DispatchQueueSchedulerQOS.swift
-//  RxSwift
-//
-//  Created by John C. "Hsoi" Daub on 12/30/15.
-//  Copyright © 2015 Krunoslav Zaher. All rights reserved.
-//
-
-import Foundation
-
-/**
-Identifies one of the global concurrent dispatch queues with specified quality of service class.
-*/
-public enum DispatchQueueSchedulerQOS {
-    
-    /**
-    Identifies global dispatch queue with `QOS_CLASS_USER_INTERACTIVE`
-    */
-    case UserInteractive
-    
-    /**
-    Identifies global dispatch queue with `QOS_CLASS_USER_INITIATED`
-    */
-    case UserInitiated
-    
-    /**
-    Identifies global dispatch queue with `QOS_CLASS_DEFAULT`
-    */
-    case Default
-
-    /**
-     Identifies global dispatch queue with `QOS_CLASS_UTILITY`
-     */
-    case Utility
-    
-    /**
-     Identifies global dispatch queue with `QOS_CLASS_BACKGROUND`
-     */
-    case Background
-}
-
-
-@available(iOS 8, OSX 10.10, *)
-extension DispatchQueueSchedulerQOS {
-    var QOSClass: qos_class_t {
-        switch self {
-        case .UserInteractive: return QOS_CLASS_USER_INTERACTIVE
-        case .UserInitiated:   return QOS_CLASS_USER_INITIATED
-        case .Default:         return QOS_CLASS_DEFAULT
-        case .Utility:         return QOS_CLASS_UTILITY
-        case .Background:      return QOS_CLASS_BACKGROUND
-        }
-    }
-}
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/HistoricalScheduler.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/HistoricalScheduler.swift
index bcb15b5..fede60e 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/HistoricalScheduler.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/HistoricalScheduler.swift
@@ -1,6 +1,6 @@
 //
 //  HistoricalScheduler.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 12/27/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,9 +8,7 @@
 
 import Foundation
 
-/**
-  Provides a virtual time scheduler that uses `NSDate` for absolute time and `NSTimeInterval` for relative time.
-*/
+/// Provides a virtual time scheduler that uses `Date` for absolute time and `NSTimeInterval` for relative time.
 public class HistoricalScheduler : VirtualTimeScheduler<HistoricalSchedulerTimeConverter> {
 
     /**
@@ -18,8 +16,7 @@ public class HistoricalScheduler : VirtualTimeScheduler<HistoricalSchedulerTimeC
      
      - parameter initialClock: Initial value for virtual clock.
     */
-    public init(initialClock: RxTime = NSDate(timeIntervalSince1970: 0)) {
+    public init(initialClock: RxTime = Date(timeIntervalSince1970: 0)) {
         super.init(initialClock: initialClock, converter: HistoricalSchedulerTimeConverter())
     }
-    
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/HistoricalSchedulerTimeConverter.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/HistoricalSchedulerTimeConverter.swift
index b16b8a2..2ef349a 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/HistoricalSchedulerTimeConverter.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/HistoricalSchedulerTimeConverter.swift
@@ -1,6 +1,6 @@
 //
 //  HistoricalSchedulerTimeConverter.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 12/27/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,76 +8,60 @@
 
 import Foundation
 
-/**
- Converts historial virtual time into real time. 
- 
- Since historical virtual time is also measured in `NSDate`, this converter is identity function.
- */
+/// Converts historial virtual time into real time.
+///
+/// Since historical virtual time is also measured in `Date`, this converter is identity function.
 public struct HistoricalSchedulerTimeConverter : VirtualTimeConverterType {
-    /**
-     Virtual time unit used that represents ticks of virtual clock.
-     */
+    /// Virtual time unit used that represents ticks of virtual clock.
     public typealias VirtualTimeUnit = RxTime
 
-    /**
-     Virtual time unit used to represent differences of virtual times.
-     */
+    /// Virtual time unit used to represent differences of virtual times.
     public typealias VirtualTimeIntervalUnit = RxTimeInterval
 
-    /**
-     Returns identical value of argument passed because historical virtual time is equal to real time, just 
-     decoupled from local machine clock.
-    */
-    public func convertFromVirtualTime(virtualTime: VirtualTimeUnit) -> RxTime {
+    /// Returns identical value of argument passed because historical virtual time is equal to real time, just
+    /// decoupled from local machine clock.
+    public func convertFromVirtualTime(_ virtualTime: VirtualTimeUnit) -> RxTime {
         return virtualTime
     }
 
-    /**
-     Returns identical value of argument passed because historical virtual time is equal to real time, just 
-     decoupled from local machine clock.
-    */
-    public func convertToVirtualTime(time: RxTime) -> VirtualTimeUnit {
+    /// Returns identical value of argument passed because historical virtual time is equal to real time, just
+    /// decoupled from local machine clock.
+    public func convertToVirtualTime(_ time: RxTime) -> VirtualTimeUnit {
         return time
     }
 
-    /**
-     Returns identical value of argument passed because historical virtual time is equal to real time, just 
-     decoupled from local machine clock.
-    */
-    public func convertFromVirtualTimeInterval(virtualTimeInterval: VirtualTimeIntervalUnit) -> RxTimeInterval {
+    /// Returns identical value of argument passed because historical virtual time is equal to real time, just
+    /// decoupled from local machine clock.
+    public func convertFromVirtualTimeInterval(_ virtualTimeInterval: VirtualTimeIntervalUnit) -> RxTimeInterval {
         return virtualTimeInterval
     }
 
-    /**
-     Returns identical value of argument passed because historical virtual time is equal to real time, just 
-     decoupled from local machine clock.
-    */
-    public func convertToVirtualTimeInterval(timeInterval: RxTimeInterval) -> VirtualTimeIntervalUnit {
+    /// Returns identical value of argument passed because historical virtual time is equal to real time, just
+    /// decoupled from local machine clock.
+    public func convertToVirtualTimeInterval(_ timeInterval: RxTimeInterval) -> VirtualTimeIntervalUnit {
         return timeInterval
     }
 
     /**
-     Offsets `NSDate` by time interval.
+     Offsets `Date` by time interval.
      
      - parameter time: Time.
      - parameter timeInterval: Time interval offset.
      - returns: Time offsetted by time interval.
     */
-    public func offsetVirtualTime(time time: VirtualTimeUnit, offset: VirtualTimeIntervalUnit) -> VirtualTimeUnit {
-        return time.dateByAddingTimeInterval(offset)
+    public func offsetVirtualTime(_ time: VirtualTimeUnit, offset: VirtualTimeIntervalUnit) -> VirtualTimeUnit {
+        return time.addingTimeInterval(offset)
     }
 
-    /**
-     Compares two `NSDate`s.
-    */
-    public func compareVirtualTime(lhs: VirtualTimeUnit, _ rhs: VirtualTimeUnit) -> VirtualTimeComparison {
-        switch lhs.compare(rhs) {
-        case .OrderedAscending:
-            return .LessThan
-        case .OrderedSame:
-            return .Equal
-        case .OrderedDescending:
-            return .GreaterThan
+    /// Compares two `Date`s.
+    public func compareVirtualTime(_ lhs: VirtualTimeUnit, _ rhs: VirtualTimeUnit) -> VirtualTimeComparison {
+        switch lhs.compare(rhs as Date) {
+        case .orderedAscending:
+            return .lessThan
+        case .orderedSame:
+            return .equal
+        case .orderedDescending:
+            return .greaterThan
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/ImmediateScheduler.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/ImmediateScheduler.swift
index fc54fd5..f3e1635 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/ImmediateScheduler.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/ImmediateScheduler.swift
@@ -1,6 +1,6 @@
 //
 //  ImmediateScheduler.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 10/17/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,9 +8,7 @@
 
 import Foundation
 
-/**
-Represents an object that schedules units of work to run immediately on the current thread.
-*/
+/// Represents an object that schedules units of work to run immediately on the current thread.
 private class ImmediateScheduler : ImmediateSchedulerType {
 
     private let _asyncLock = AsyncLock<AnonymousInvocable>()
@@ -25,15 +23,15 @@ private class ImmediateScheduler : ImmediateSchedulerType {
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    func schedule<StateType>(state: StateType, action: (StateType) -> Disposable) -> Disposable {
+    func schedule<StateType>(_ state: StateType, action: @escaping (StateType) -> Disposable) -> Disposable {
         let disposable = SingleAssignmentDisposable()
         _asyncLock.invoke(AnonymousInvocable {
-            if disposable.disposed {
+            if disposable.isDisposed {
                 return
             }
-            disposable.disposable = action(state)
+            disposable.setDisposable(action(state))
         })
 
         return disposable
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/AnonymousInvocable.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/AnonymousInvocable.swift
index 8525db4..b3a19af 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/AnonymousInvocable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/AnonymousInvocable.swift
@@ -1,6 +1,6 @@
 //
 //  AnonymousInvocable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 11/7/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -11,11 +11,11 @@ import Foundation
 struct AnonymousInvocable : InvocableType {
     private let _action: () -> ()
 
-    init(_ action: () -> ()) {
+    init(_ action: @escaping () -> ()) {
         _action = action
     }
 
     func invoke() {
         _action()
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/DispatchQueueConfiguration.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/DispatchQueueConfiguration.swift
new file mode 100644
index 0000000..be7040c
--- /dev/null
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/DispatchQueueConfiguration.swift
@@ -0,0 +1,104 @@
+//
+//  DispatchQueueConfiguration.swift
+//  RxSwift
+//
+//  Created by Krunoslav Zaher on 7/23/16.
+//  Copyright © 2016 Krunoslav Zaher. All rights reserved.
+//
+
+import Foundation
+import Dispatch
+
+struct DispatchQueueConfiguration {
+    let queue: DispatchQueue
+    let leeway: DispatchTimeInterval
+}
+
+private func dispatchInterval(_ interval: Foundation.TimeInterval) -> DispatchTimeInterval {
+    precondition(interval >= 0.0)
+    // TODO: Replace 1000 with something that actually works 
+    // NSEC_PER_MSEC returns 1000000
+    return DispatchTimeInterval.milliseconds(Int(interval * 1000.0))
+}
+
+extension DispatchQueueConfiguration {
+    func schedule<StateType>(_ state: StateType, action: @escaping (StateType) -> Disposable) -> Disposable {
+        let cancel = SingleAssignmentDisposable()
+
+        queue.async {
+            if cancel.isDisposed {
+                return
+            }
+
+
+            cancel.setDisposable(action(state))
+        }
+
+        return cancel
+    }
+
+    func scheduleRelative<StateType>(_ state: StateType, dueTime: Foundation.TimeInterval, action: @escaping (StateType) -> Disposable) -> Disposable {
+        let deadline = DispatchTime.now() + dispatchInterval(dueTime)
+
+        let compositeDisposable = CompositeDisposable()
+
+        let timer = DispatchSource.makeTimerSource(queue: queue)
+        timer.scheduleOneshot(deadline: deadline)
+
+        // TODO:
+        // This looks horrible, and yes, it is.
+        // It looks like Apple has made a conceputal change here, and I'm unsure why.
+        // Need more info on this.
+        // It looks like just setting timer to fire and not holding a reference to it
+        // until deadline causes timer cancellation.
+        var timerReference: DispatchSourceTimer? = timer
+        let cancelTimer = Disposables.create {
+            timerReference?.cancel()
+            timerReference = nil
+        }
+
+        timer.setEventHandler(handler: {
+            if compositeDisposable.isDisposed {
+                return
+            }
+            _ = compositeDisposable.insert(action(state))
+            cancelTimer.dispose()
+        })
+        timer.resume()
+
+        _ = compositeDisposable.insert(cancelTimer)
+
+        return compositeDisposable
+    }
+
+    func schedulePeriodic<StateType>(_ state: StateType, startAfter: TimeInterval, period: TimeInterval, action: @escaping (StateType) -> StateType) -> Disposable {
+        let initial = DispatchTime.now() + dispatchInterval(startAfter)
+
+        var timerState = state
+
+        let timer = DispatchSource.makeTimerSource(queue: queue)
+        timer.scheduleRepeating(deadline: initial, interval: dispatchInterval(period), leeway: leeway)
+
+        // TODO:
+        // This looks horrible, and yes, it is.
+        // It looks like Apple has made a conceputal change here, and I'm unsure why.
+        // Need more info on this.
+        // It looks like just setting timer to fire and not holding a reference to it
+        // until deadline causes timer cancellation.
+        var timerReference: DispatchSourceTimer? = timer
+        let cancelTimer = Disposables.create {
+            timerReference?.cancel()
+            timerReference = nil
+        }
+
+        timer.setEventHandler(handler: {
+            if cancelTimer.isDisposed {
+                return
+            }
+            timerState = action(timerState)
+        })
+        timer.resume()
+        
+        return cancelTimer
+    }
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/InvocableScheduledItem.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/InvocableScheduledItem.swift
index 1a4e3aa..54c7f19 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/InvocableScheduledItem.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/InvocableScheduledItem.swift
@@ -1,6 +1,6 @@
 //
 //  InvocableScheduledItem.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 11/7/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -21,4 +21,4 @@ struct InvocableScheduledItem<I: InvocableWithValueType> : InvocableType {
     func invoke() {
         _invocable.invoke(_state)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/InvocableType.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/InvocableType.swift
index 1632e71..1f95c66 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/InvocableType.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/InvocableType.swift
@@ -1,6 +1,6 @@
 //
 //  InvocableType.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 11/7/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -15,5 +15,5 @@ protocol InvocableType {
 protocol InvocableWithValueType {
     associatedtype Value
 
-    func invoke(value: Value)
-}
\ No newline at end of file
+    func invoke(_ value: Value)
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/ScheduledItem.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/ScheduledItem.swift
index 0b58332..c03b2eb 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/ScheduledItem.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/ScheduledItem.swift
@@ -1,6 +1,6 @@
 //
 //  ScheduledItem.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 9/2/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -11,27 +11,27 @@ import Foundation
 struct ScheduledItem<T>
     : ScheduledItemType
     , InvocableType {
-    typealias Action = T -> Disposable
+    typealias Action = (T) -> Disposable
     
     private let _action: Action
     private let _state: T
 
     private let _disposable = SingleAssignmentDisposable()
 
-    var disposed: Bool {
-        return _disposable.disposed
+    var isDisposed: Bool {
+        return _disposable.isDisposed
     }
     
-    init(action: Action, state: T) {
+    init(action: @escaping Action, state: T) {
         _action = action
         _state = state
     }
     
     func invoke() {
-         _disposable.disposable = _action(_state)
+         _disposable.setDisposable(_action(_state))
     }
     
     func dispose() {
         _disposable.dispose()
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/ScheduledItemType.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/ScheduledItemType.swift
index 2a1eca2..a5f0b0b 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/ScheduledItemType.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/Internal/ScheduledItemType.swift
@@ -1,6 +1,6 @@
 //
 //  ScheduledItemType.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 11/7/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/MainScheduler.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/MainScheduler.swift
index dfda88c..5adfa78 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/MainScheduler.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/MainScheduler.swift
@@ -1,15 +1,16 @@
 //
 //  MainScheduler.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/8/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
 //
 
 import Foundation
+import Dispatch
 
 /**
-Abstracts work that needs to be performed on `MainThread`. In case `schedule` methods are called from main thread, it will perform action immediately without scheduling.
+Abstracts work that needs to be performed on `DispatchQueue.main`. In case `schedule` methods are called from `DispatchQueue.main`, it will perform action immediately without scheduling.
 
 This scheduler is usually used to perform UI work.
 
@@ -20,52 +21,47 @@ operator please use `ConcurrentMainScheduler` because it is more optimized for t
 */
 public final class MainScheduler : SerialDispatchQueueScheduler {
 
-    private let _mainQueue: dispatch_queue_t
+    private let _mainQueue: DispatchQueue
 
     var numberEnqueued: AtomicInt = 0
 
-    private init() {
-        _mainQueue = dispatch_get_main_queue()
+    /// Initializes new instance of `MainScheduler`.
+    public init() {
+        _mainQueue = DispatchQueue.main
         super.init(serialQueue: _mainQueue)
     }
 
-    /**
-    Singleton instance of `MainScheduler`
-    */
+    /// Singleton instance of `MainScheduler`
     public static let instance = MainScheduler()
 
-    /**
-    Singleton instance of `MainScheduler` that always schedules work asynchronously
-    and doesn't perform optimizations for calls scheduled from main thread.
-    */
-    public static let asyncInstance = SerialDispatchQueueScheduler(serialQueue: dispatch_get_main_queue())
-
-    /**
-    In case this method is called on a background thread it will throw an exception.
-    */
-    public class func ensureExecutingOnScheduler() {
-        if !NSThread.currentThread().isMainThread {
-            rxFatalError("Executing on backgound thread. Please use `MainScheduler.instance.schedule` to schedule work on main thread.")
+    /// Singleton instance of `MainScheduler` that always schedules work asynchronously
+    /// and doesn't perform optimizations for calls scheduled from main queue.
+    public static let asyncInstance = SerialDispatchQueueScheduler(serialQueue: DispatchQueue.main)
+
+    /// In case this method is called on a background thread it will throw an exception.
+    public class func ensureExecutingOnScheduler(errorMessage: String? = nil) {
+        if !DispatchQueue.isMain {
+            rxFatalError(errorMessage ?? "Executing on backgound thread. Please use `MainScheduler.instance.schedule` to schedule work on main thread.")
         }
     }
 
-    override func scheduleInternal<StateType>(state: StateType, action: StateType -> Disposable) -> Disposable {
+    override func scheduleInternal<StateType>(_ state: StateType, action: @escaping (StateType) -> Disposable) -> Disposable {
         let currentNumberEnqueued = AtomicIncrement(&numberEnqueued)
 
-        if NSThread.currentThread().isMainThread && currentNumberEnqueued == 1 {
+        if DispatchQueue.isMain && currentNumberEnqueued == 1 {
             let disposable = action(state)
-            AtomicDecrement(&numberEnqueued)
+            _ = AtomicDecrement(&numberEnqueued)
             return disposable
         }
 
         let cancel = SingleAssignmentDisposable()
 
-        dispatch_async(_mainQueue) {
-            if !cancel.disposed {
-                action(state)
+        _mainQueue.async {
+            if !cancel.isDisposed {
+                _ = action(state)
             }
 
-            AtomicDecrement(&self.numberEnqueued)
+            _ = AtomicDecrement(&self.numberEnqueued)
         }
 
         return cancel
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/OperationQueueScheduler.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/OperationQueueScheduler.swift
index 553ceeb..957f053 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/OperationQueueScheduler.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/OperationQueueScheduler.swift
@@ -1,6 +1,6 @@
 //
 //  OperationQueueScheduler.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 4/4/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,20 +8,16 @@
 
 import Foundation
 
-/**
-Abstracts the work that needs to be performed on a specific `NSOperationQueue`.
-
-This scheduler is suitable for cases when there is some bigger chunk of work that needs to be performed in background and you want to fine tune concurrent processing using `maxConcurrentOperationCount`.
-*/
+/// Abstracts the work that needs to be performed on a specific `NSOperationQueue`.
+///
+/// This scheduler is suitable for cases when there is some bigger chunk of work that needs to be performed in background and you want to fine tune concurrent processing using `maxConcurrentOperationCount`.
 public class OperationQueueScheduler: ImmediateSchedulerType {
-    public let operationQueue: NSOperationQueue
-    
-    /**
-    Constructs new instance of `OperationQueueScheduler` that performs work on `operationQueue`.
+    public let operationQueue: OperationQueue
     
-    - parameter operationQueue: Operation queue targeted to perform work on.
-    */
-    public init(operationQueue: NSOperationQueue) {
+    /// Constructs new instance of `OperationQueueScheduler` that performs work on `operationQueue`.
+    ///
+    /// - parameter operationQueue: Operation queue targeted to perform work on.
+    public init(operationQueue: OperationQueue) {
         self.operationQueue = operationQueue
     }
     
@@ -32,26 +28,21 @@ public class OperationQueueScheduler: ImmediateSchedulerType {
     - parameter action: Action to execute recursively. The last parameter passed to the action is used to trigger recursive scheduling of the action, passing in recursive invocation state.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    public func schedule<StateType>(state: StateType, action: (StateType) -> Disposable) -> Disposable {
-        
-        let compositeDisposable = CompositeDisposable()
-        
-        weak var compositeDisposableWeak = compositeDisposable
-        
-        let operation = NSBlockOperation {
-            if compositeDisposableWeak?.disposed ?? false {
+    public func schedule<StateType>(_ state: StateType, action: @escaping (StateType) -> Disposable) -> Disposable {
+        let cancel = SingleAssignmentDisposable()
+
+        let operation = BlockOperation {
+            if cancel.isDisposed {
                 return
             }
-            
-            let disposable = action(state)
-            compositeDisposableWeak?.addDisposable(disposable)
+
+
+            cancel.setDisposable(action(state))
         }
 
         self.operationQueue.addOperation(operation)
         
-        compositeDisposable.addDisposable(AnonymousDisposable(operation.cancel))
-
-        return compositeDisposable
+        return cancel
     }
 
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/RecursiveScheduler.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/RecursiveScheduler.swift
index 731d202..6ff0f2b 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/RecursiveScheduler.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/RecursiveScheduler.swift
@@ -8,11 +8,9 @@
 
 import Foundation
 
-/**
-Type erased recursive scheduler.
-*/
+/// Type erased recursive scheduler.
 class AnyRecursiveScheduler<State> {
-    typealias Action =  (state: State, scheduler: AnyRecursiveScheduler<State>) -> Void
+    typealias Action =  (State, AnyRecursiveScheduler<State>) -> Void
 
     private let _lock = NSRecursiveLock()
     
@@ -22,7 +20,7 @@ class AnyRecursiveScheduler<State> {
     private var _scheduler: SchedulerType
     private var _action: Action?
     
-    init(scheduler: SchedulerType, action: Action) {
+    init(scheduler: SchedulerType, action: @escaping Action) {
         _action = action
         _scheduler = scheduler
     }
@@ -33,7 +31,7 @@ class AnyRecursiveScheduler<State> {
     - parameter state: State passed to the action to be executed.
     - parameter dueTime: Relative time after which to execute the recursive action.
     */
-    func schedule(state: State, dueTime: RxTimeInterval) {
+    func schedule(_ state: State, dueTime: RxTimeInterval) {
 
         var isAdded = false
         var isDone = false
@@ -41,13 +39,13 @@ class AnyRecursiveScheduler<State> {
         var removeKey: CompositeDisposable.DisposeKey? = nil
         let d = _scheduler.scheduleRelative(state, dueTime: dueTime) { (state) -> Disposable in
             // best effort
-            if self._group.disposed {
-                return NopDisposable.instance
+            if self._group.isDisposed {
+                return Disposables.create()
             }
             
             let action = self._lock.calculateLocked { () -> Action? in
                 if isAdded {
-                    self._group.removeDisposable(removeKey!)
+                    self._group.remove(for: removeKey!)
                 }
                 else {
                     isDone = true
@@ -57,26 +55,24 @@ class AnyRecursiveScheduler<State> {
             }
             
             if let action = action {
-                action(state: state, scheduler: self)
+                action(state, self)
             }
             
-            return NopDisposable.instance
+            return Disposables.create()
         }
             
         _lock.performLocked {
             if !isDone {
-                removeKey = _group.addDisposable(d)
+                removeKey = _group.insert(d)
                 isAdded = true
             }
         }
     }
 
-    /**
-    Schedules an action to be executed recursively.
-    
-    - parameter state: State passed to the action to be executed.
-    */
-    func schedule(state: State) {
+    /// Schedules an action to be executed recursively.
+    ///
+    /// - parameter state: State passed to the action to be executed.
+    func schedule(_ state: State) {
             
         var isAdded = false
         var isDone = false
@@ -84,13 +80,13 @@ class AnyRecursiveScheduler<State> {
         var removeKey: CompositeDisposable.DisposeKey? = nil
         let d = _scheduler.schedule(state) { (state) -> Disposable in
             // best effort
-            if self._group.disposed {
-                return NopDisposable.instance
+            if self._group.isDisposed {
+                return Disposables.create()
             }
             
             let action = self._lock.calculateLocked { () -> Action? in
                 if isAdded {
-                    self._group.removeDisposable(removeKey!)
+                    self._group.remove(for: removeKey!)
                 }
                 else {
                     isDone = true
@@ -100,15 +96,15 @@ class AnyRecursiveScheduler<State> {
             }
            
             if let action = action {
-                action(state: state, scheduler: self)
+                action(state, self)
             }
             
-            return NopDisposable.instance
+            return Disposables.create()
         }
         
         _lock.performLocked {
             if !isDone {
-                removeKey = _group.addDisposable(d)
+                removeKey = _group.insert(d)
                 isAdded = true
             }
         }
@@ -122,11 +118,9 @@ class AnyRecursiveScheduler<State> {
     }
 }
 
-/**
-Type erased recursive scheduler.
-*/
+/// Type erased recursive scheduler.
 class RecursiveImmediateScheduler<State> {
-    typealias Action =  (state: State, recurse: State -> Void) -> Void
+    typealias Action =  (_ state: State, _ recurse: (State) -> Void) -> Void
     
     private var _lock = SpinLock()
     private let _group = CompositeDisposable()
@@ -134,33 +128,31 @@ class RecursiveImmediateScheduler<State> {
     private var _action: Action?
     private let _scheduler: ImmediateSchedulerType
     
-    init(action: Action, scheduler: ImmediateSchedulerType) {
+    init(action: @escaping Action, scheduler: ImmediateSchedulerType) {
         _action = action
         _scheduler = scheduler
     }
     
     // immediate scheduling
     
-    /**
-    Schedules an action to be executed recursively.
-    
-    - parameter state: State passed to the action to be executed.
-    */
-    func schedule(state: State) {
-        
+    /// Schedules an action to be executed recursively.
+    ///
+    /// - parameter state: State passed to the action to be executed.
+    func schedule(_ state: State) {
+
         var isAdded = false
         var isDone = false
         
         var removeKey: CompositeDisposable.DisposeKey? = nil
         let d = _scheduler.schedule(state) { (state) -> Disposable in
             // best effort
-            if self._group.disposed {
-                return NopDisposable.instance
+            if self._group.isDisposed {
+                return Disposables.create()
             }
             
             let action = self._lock.calculateLocked { () -> Action? in
                 if isAdded {
-                    self._group.removeDisposable(removeKey!)
+                    self._group.remove(for: removeKey!)
                 }
                 else {
                     isDone = true
@@ -170,15 +162,15 @@ class RecursiveImmediateScheduler<State> {
             }
             
             if let action = action {
-                action(state: state, recurse: self.schedule)
+                action(state, self.schedule)
             }
             
-            return NopDisposable.instance
+            return Disposables.create()
         }
         
         _lock.performLocked {
             if !isDone {
-                removeKey = _group.addDisposable(d)
+                removeKey = _group.insert(d)
                 isAdded = true
             }
         }
@@ -190,4 +182,4 @@ class RecursiveImmediateScheduler<State> {
         }
         _group.dispose()
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/SchedulerServices+Emulation.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/SchedulerServices+Emulation.swift
index 3906d7a..9374fc5 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/SchedulerServices+Emulation.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/SchedulerServices+Emulation.swift
@@ -9,12 +9,12 @@
 import Foundation
 
 enum SchedulePeriodicRecursiveCommand {
-    case Tick
-    case DispatchStart
+    case tick
+    case dispatchStart
 }
 
 class SchedulePeriodicRecursive<State> {
-    typealias RecursiveAction = State -> State
+    typealias RecursiveAction = (State) -> State
     typealias RecursiveScheduler = AnyRecursiveScheduler<SchedulePeriodicRecursiveCommand>
 
     private let _scheduler: SchedulerType
@@ -25,7 +25,7 @@ class SchedulePeriodicRecursive<State> {
     private var _state: State
     private var _pendingTickCount: AtomicInt = 0
 
-    init(scheduler: SchedulerType, startAfter: RxTimeInterval, period: RxTimeInterval, action: RecursiveAction, state: State) {
+    init(scheduler: SchedulerType, startAfter: RxTimeInterval, period: RxTimeInterval, action: @escaping RecursiveAction, state: State) {
         _scheduler = scheduler
         _startAfter = startAfter
         _period = period
@@ -34,29 +34,29 @@ class SchedulePeriodicRecursive<State> {
     }
 
     func start() -> Disposable {
-        return _scheduler.scheduleRecursive(SchedulePeriodicRecursiveCommand.Tick, dueTime: _startAfter, action: self.tick)
+        return _scheduler.scheduleRecursive(SchedulePeriodicRecursiveCommand.tick, dueTime: _startAfter, action: self.tick)
     }
 
-    func tick(command: SchedulePeriodicRecursiveCommand, scheduler: RecursiveScheduler) -> Void {
+    func tick(_ command: SchedulePeriodicRecursiveCommand, scheduler: RecursiveScheduler) -> Void {
         // Tries to emulate periodic scheduling as best as possible.
         // The problem that could arise is if handling periodic ticks take too long, or
         // tick interval is short.
         switch command {
-        case .Tick:
-            scheduler.schedule(.Tick, dueTime: _period)
+        case .tick:
+            scheduler.schedule(.tick, dueTime: _period)
 
             // The idea is that if on tick there wasn't any item enqueued, schedule to perform work immediatelly.
             // Else work will be scheduled after previous enqueued work completes.
             if AtomicIncrement(&_pendingTickCount) == 1 {
-                self.tick(.DispatchStart, scheduler: scheduler)
+                self.tick(.dispatchStart, scheduler: scheduler)
             }
 
-        case .DispatchStart:
+        case .dispatchStart:
             _state = _action(_state)
             // Start work and schedule check is this last batch of work
             if AtomicDecrement(&_pendingTickCount) > 0 {
                 // This gives priority to scheduler emulation, it's not perfect, but helps
-                scheduler.schedule(SchedulePeriodicRecursiveCommand.DispatchStart)
+                scheduler.schedule(SchedulePeriodicRecursiveCommand.dispatchStart)
             }
         }
     }
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/SerialDispatchQueueScheduler.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/SerialDispatchQueueScheduler.swift
index 4108fe4..fab8cbe 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/SerialDispatchQueueScheduler.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/SerialDispatchQueueScheduler.swift
@@ -1,12 +1,13 @@
 //
 //  SerialDispatchQueueScheduler.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/8/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
 //
 
 import Foundation
+import Dispatch
 
 /**
 Abstracts the work that needs to be performed on a specific `dispatch_queue_t`. It will make sure 
@@ -25,24 +26,19 @@ In case some customization need to be made on it before usage,
 internal serial queue can be customized using `serialQueueConfiguration`
 callback.
 */
-public class SerialDispatchQueueScheduler: SchedulerType {
-    public typealias TimeInterval = NSTimeInterval
-    public typealias Time = NSDate
+public class SerialDispatchQueueScheduler : SchedulerType {
+    public typealias TimeInterval = Foundation.TimeInterval
+    public typealias Time = Date
     
-    private let _serialQueue : dispatch_queue_t
-
-    /**
-    - returns: Current time.
-    */
-    public var now : NSDate {
-        return NSDate()
+    /// - returns: Current time.
+    public var now : Date {
+        return Date()
     }
+
+    let configuration: DispatchQueueConfiguration
     
-    // leeway for scheduling timers
-    private var _leeway: Int64 = 0
-    
-    init(serialQueue: dispatch_queue_t) {
-        _serialQueue = serialQueue
+    init(serialQueue: DispatchQueue, leeway: DispatchTimeInterval = DispatchTimeInterval.nanoseconds(0)) {
+        configuration = DispatchQueueConfiguration(queue: serialQueue, leeway: leeway)
     }
 
     /**
@@ -53,10 +49,10 @@ public class SerialDispatchQueueScheduler: SchedulerType {
     - parameter internalSerialQueueName: Name of internal serial dispatch queue.
     - parameter serialQueueConfiguration: Additional configuration of internal serial dispatch queue.
     */
-    public convenience init(internalSerialQueueName: String, serialQueueConfiguration: ((dispatch_queue_t) -> Void)? = nil) {
-        let queue = dispatch_queue_create(internalSerialQueueName, DISPATCH_QUEUE_SERIAL)
+    public convenience init(internalSerialQueueName: String, serialQueueConfiguration: ((DispatchQueue) -> Void)? = nil, leeway: DispatchTimeInterval = DispatchTimeInterval.nanoseconds(0)) {
+        let queue = DispatchQueue(label: internalSerialQueueName, attributes: [])
         serialQueueConfiguration?(queue)
-        self.init(serialQueue: queue)
+        self.init(serialQueue: queue, leeway: leeway)
     }
     
     /**
@@ -65,30 +61,23 @@ public class SerialDispatchQueueScheduler: SchedulerType {
     - parameter queue: Possibly concurrent dispatch queue used to perform work.
     - parameter internalSerialQueueName: Name of internal serial dispatch queue proxy.
     */
-    public convenience init(queue: dispatch_queue_t, internalSerialQueueName: String) {
-        let serialQueue = dispatch_queue_create(internalSerialQueueName, DISPATCH_QUEUE_SERIAL)
-        dispatch_set_target_queue(serialQueue, queue)
-        self.init(serialQueue: serialQueue)
+    public convenience init(queue: DispatchQueue, internalSerialQueueName: String, leeway: DispatchTimeInterval = DispatchTimeInterval.nanoseconds(0)) {
+        // Swift 3.0 IUO
+        let serialQueue = DispatchQueue(label: internalSerialQueueName,
+                                        attributes: [],
+                                        target: queue)
+        self.init(serialQueue: serialQueue, leeway: leeway)
     }
 
     /**
      Constructs new `SerialDispatchQueueScheduler` that wraps on of the global concurrent dispatch queues.
      
-     - parameter globalConcurrentQueueQOS: Identifier for global dispatch queue with specified quality of service class.
+     - parameter qos: Identifier for global dispatch queue with specified quality of service class.
      - parameter internalSerialQueueName: Custom name for internal serial dispatch queue proxy.
      */
     @available(iOS 8, OSX 10.10, *)
-    public convenience init(globalConcurrentQueueQOS: DispatchQueueSchedulerQOS, internalSerialQueueName: String = "rx.global_dispatch_queue.serial") {
-        let priority = globalConcurrentQueueQOS.QOSClass
-        self.init(queue: dispatch_get_global_queue(priority, UInt(0)), internalSerialQueueName: internalSerialQueueName)
-    }
-
-    class func convertTimeIntervalToDispatchInterval(timeInterval: NSTimeInterval) -> Int64 {
-        return Int64(timeInterval * Double(NSEC_PER_SEC))
-    }
-    
-    class func convertTimeIntervalToDispatchTime(timeInterval: NSTimeInterval) -> dispatch_time_t {
-        return dispatch_time(DISPATCH_TIME_NOW, convertTimeIntervalToDispatchInterval(timeInterval))
+    public convenience init(qos: DispatchQoS, internalSerialQueueName: String = "rx.global_dispatch_queue.serial", leeway: DispatchTimeInterval = DispatchTimeInterval.nanoseconds(0)) {
+        self.init(queue: DispatchQueue.global(qos: qos.qosClass), internalSerialQueueName: internalSerialQueueName, leeway: leeway)
     }
     
     /**
@@ -98,25 +87,14 @@ public class SerialDispatchQueueScheduler: SchedulerType {
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    public final func schedule<StateType>(state: StateType, action: (StateType) -> Disposable) -> Disposable {
+    public final func schedule<StateType>(_ state: StateType, action: @escaping (StateType) -> Disposable) -> Disposable {
         return self.scheduleInternal(state, action: action)
     }
-    
-    func scheduleInternal<StateType>(state: StateType, action: (StateType) -> Disposable) -> Disposable {
-        let cancel = SingleAssignmentDisposable()
-        
-        dispatch_async(_serialQueue) {
-            if cancel.disposed {
-                return
-            }
-            
-            
-            cancel.disposable = action(state)
-        }
-        
-        return cancel
+
+    func scheduleInternal<StateType>(_ state: StateType, action: @escaping (StateType) -> Disposable) -> Disposable {
+        return self.configuration.schedule(state, action: action)
     }
-    
+
     /**
     Schedules an action to be executed.
     
@@ -125,27 +103,8 @@ public class SerialDispatchQueueScheduler: SchedulerType {
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    public final func scheduleRelative<StateType>(state: StateType, dueTime: NSTimeInterval, action: (StateType) -> Disposable) -> Disposable {
-        let timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, _serialQueue)
-        
-        let dispatchInterval = MainScheduler.convertTimeIntervalToDispatchTime(dueTime)
-        
-        let compositeDisposable = CompositeDisposable()
-        
-        dispatch_source_set_timer(timer, dispatchInterval, DISPATCH_TIME_FOREVER, 0)
-        dispatch_source_set_event_handler(timer, {
-            if compositeDisposable.disposed {
-                return
-            }
-            compositeDisposable.addDisposable(action(state))
-        })
-        dispatch_resume(timer)
-        
-        compositeDisposable.addDisposable(AnonymousDisposable {
-            dispatch_source_cancel(timer)
-        })
-        
-        return compositeDisposable
+    public final func scheduleRelative<StateType>(_ state: StateType, dueTime: Foundation.TimeInterval, action: @escaping (StateType) -> Disposable) -> Disposable {
+        return self.configuration.scheduleRelative(state, dueTime: dueTime, action: action)
     }
     
     /**
@@ -157,28 +116,7 @@ public class SerialDispatchQueueScheduler: SchedulerType {
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    public func schedulePeriodic<StateType>(state: StateType, startAfter: TimeInterval, period: TimeInterval, action: (StateType) -> StateType) -> Disposable {
-        let timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, _serialQueue)
-        
-        let initial = MainScheduler.convertTimeIntervalToDispatchTime(startAfter)
-        let dispatchInterval = MainScheduler.convertTimeIntervalToDispatchInterval(period)
-        
-        var timerState = state
-        
-        let validDispatchInterval = dispatchInterval < 0 ? 0 : UInt64(dispatchInterval)
-        
-        dispatch_source_set_timer(timer, initial, validDispatchInterval, 0)
-        let cancel = AnonymousDisposable {
-            dispatch_source_cancel(timer)
-        }
-        dispatch_source_set_event_handler(timer, {
-            if cancel.disposed {
-                return
-            }
-            timerState = action(timerState)
-        })
-        dispatch_resume(timer)
-        
-        return cancel
+    public func schedulePeriodic<StateType>(_ state: StateType, startAfter: TimeInterval, period: TimeInterval, action: @escaping (StateType) -> StateType) -> Disposable {
+        return self.configuration.schedulePeriodic(state, startAfter: startAfter, period: period, action: action)
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/VirtualTimeConverterType.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/VirtualTimeConverterType.swift
index 979a5c8..f7aa87a 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/VirtualTimeConverterType.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/VirtualTimeConverterType.swift
@@ -1,6 +1,6 @@
 //
 //  VirtualTimeConverterType.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 12/23/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,35 +8,29 @@
 
 import Foundation
 
-/**
-Parametrization for virtual time used by `VirtualTimeScheduler`s.
-*/
+/// Parametrization for virtual time used by `VirtualTimeScheduler`s.
 public protocol VirtualTimeConverterType {
-    /**
-     Virtual time unit used that represents ticks of virtual clock.
-    */
+    /// Virtual time unit used that represents ticks of virtual clock.
     associatedtype VirtualTimeUnit
 
-    /**
-     Virtual time unit used to represent differences of virtual times.
-    */
+    /// Virtual time unit used to represent differences of virtual times.
     associatedtype VirtualTimeIntervalUnit
 
     /**
      Converts virtual time to real time.
      
-     - parameter virtualTime: Virtual time to convert to `NSDate`.
-     - returns: `NSDate` corresponding to virtual time.
+     - parameter virtualTime: Virtual time to convert to `Date`.
+     - returns: `Date` corresponding to virtual time.
     */
-    func convertFromVirtualTime(virtualTime: VirtualTimeUnit) -> RxTime
+    func convertFromVirtualTime(_ virtualTime: VirtualTimeUnit) -> RxTime
 
     /**
      Converts real time to virtual time.
      
-     - parameter time: `NSDate` to convert to virtual time.
-     - returns: Virtual time corresponding to `NSDate`.
+     - parameter time: `Date` to convert to virtual time.
+     - returns: Virtual time corresponding to `Date`.
     */
-    func convertToVirtualTime(time: RxTime) -> VirtualTimeUnit
+    func convertToVirtualTime(_ time: RxTime) -> VirtualTimeUnit
 
     /**
      Converts from virtual time interval to `NSTimeInterval`.
@@ -44,7 +38,7 @@ public protocol VirtualTimeConverterType {
      - parameter virtualTimeInterval: Virtual time interval to convert to `NSTimeInterval`.
      - returns: `NSTimeInterval` corresponding to virtual time interval.
     */
-    func convertFromVirtualTimeInterval(virtualTimeInterval: VirtualTimeIntervalUnit) -> RxTimeInterval
+    func convertFromVirtualTimeInterval(_ virtualTimeInterval: VirtualTimeIntervalUnit) -> RxTimeInterval
 
     /**
      Converts from virtual time interval to `NSTimeInterval`.
@@ -52,7 +46,7 @@ public protocol VirtualTimeConverterType {
      - parameter timeInterval: `NSTimeInterval` to convert to virtual time interval.
      - returns: Virtual time interval corresponding to time interval.
     */
-    func convertToVirtualTimeInterval(timeInterval: RxTimeInterval) -> VirtualTimeIntervalUnit
+    func convertToVirtualTimeInterval(_ timeInterval: RxTimeInterval) -> VirtualTimeIntervalUnit
 
     /**
      Offsets virtual time by virtual time interval.
@@ -61,55 +55,43 @@ public protocol VirtualTimeConverterType {
      - parameter offset: Virtual time interval.
      - returns: Time corresponding to time offsetted by virtual time interval.
     */
-    func offsetVirtualTime(time time: VirtualTimeUnit, offset: VirtualTimeIntervalUnit) -> VirtualTimeUnit
+    func offsetVirtualTime(_ time: VirtualTimeUnit, offset: VirtualTimeIntervalUnit) -> VirtualTimeUnit
 
     /**
-     This is aditional abstraction because `NSDate` is unfortunately not comparable.
-     Extending `NSDate` with `Comparable` would be too risky because of possible collisions with other libraries.
+     This is aditional abstraction because `Date` is unfortunately not comparable.
+     Extending `Date` with `Comparable` would be too risky because of possible collisions with other libraries.
     */
-    func compareVirtualTime(lhs: VirtualTimeUnit, _ rhs: VirtualTimeUnit) -> VirtualTimeComparison
+    func compareVirtualTime(_ lhs: VirtualTimeUnit, _ rhs: VirtualTimeUnit) -> VirtualTimeComparison
 }
 
 /**
  Virtual time comparison result.
 
- This is aditional abstraction because `NSDate` is unfortunately not comparable.
- Extending `NSDate` with `Comparable` would be too risky because of possible collisions with other libraries.
+ This is aditional abstraction because `Date` is unfortunately not comparable.
+ Extending `Date` with `Comparable` would be too risky because of possible collisions with other libraries.
 */
 public enum VirtualTimeComparison {
-    /**
-     lhs < rhs.
-    */
-    case LessThan
-    /**
-     lhs == rhs.
-    */
-    case Equal
-    /**
-     lhs > rhs.
-    */
-    case GreaterThan
+    /// lhs < rhs.
+    case lessThan
+    /// lhs == rhs.
+    case equal
+    /// lhs > rhs.
+    case greaterThan
 }
 
 extension VirtualTimeComparison {
-    /**
-     lhs < rhs.
-    */
+    /// lhs < rhs.
     var lessThen: Bool {
-        return self == .LessThan
+        return self == .lessThan
     }
 
-    /**
-    lhs > rhs
-    */
+    /// lhs > rhs
     var greaterThan: Bool {
-        return self == .GreaterThan
+        return self == .greaterThan
     }
 
-    /**
-     lhs == rhs
-    */
+    /// lhs == rhs
     var equal: Bool {
-        return self == .Equal
+        return self == .equal
     }
 }
diff --git a/Example/Pods/RxSwift/RxSwift/Schedulers/VirtualTimeScheduler.swift b/Example/Pods/RxSwift/RxSwift/Schedulers/VirtualTimeScheduler.swift
index 4171683..2956c4b 100644
--- a/Example/Pods/RxSwift/RxSwift/Schedulers/VirtualTimeScheduler.swift
+++ b/Example/Pods/RxSwift/RxSwift/Schedulers/VirtualTimeScheduler.swift
@@ -1,6 +1,6 @@
 //
 //  VirtualTimeScheduler.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/14/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,12 +8,9 @@
 
 import Foundation
 
-/**
-Base class for virtual time schedulers using a priority queue for scheduled items.
-*/
-public class VirtualTimeScheduler<Converter: VirtualTimeConverterType>
-    : SchedulerType
-    , CustomDebugStringConvertible {
+/// Base class for virtual time schedulers using a priority queue for scheduled items.
+open class VirtualTimeScheduler<Converter: VirtualTimeConverterType>
+    : SchedulerType {
 
     public typealias VirtualTime = Converter.VirtualTimeUnit
     public typealias VirtualTimeInterval = Converter.VirtualTimeIntervalUnit
@@ -22,46 +19,40 @@ public class VirtualTimeScheduler<Converter: VirtualTimeConverterType>
 
     private var _clock: VirtualTime
 
-    private var _schedulerQueue : PriorityQueue<VirtualSchedulerItem<VirtualTime>>
+    fileprivate var _schedulerQueue : PriorityQueue<VirtualSchedulerItem<VirtualTime>>
     private var _converter: Converter
 
     private var _nextId = 0
 
-    /**
-    - returns: Current time.
-    */
+    /// - returns: Current time.
     public var now: RxTime {
         return _converter.convertFromVirtualTime(clock)
     }
 
-    /**
-    - returns: Scheduler's absolute time clock value.
-    */
+    /// - returns: Scheduler's absolute time clock value.
     public var clock: VirtualTime {
         return _clock
     }
 
-    /**
-     Creates a new virtual time scheduler.
-     
-     - parameter initialClock: Initial value for the clock.
-    */
+    /// Creates a new virtual time scheduler.
+    ///
+    /// - parameter initialClock: Initial value for the clock.
     public init(initialClock: VirtualTime, converter: Converter) {
         _clock = initialClock
         _running = false
         _converter = converter
         _schedulerQueue = PriorityQueue(hasHigherPriority: {
             switch converter.compareVirtualTime($0.time, $1.time) {
-            case .LessThan:
+            case .lessThan:
                 return true
-            case .Equal:
+            case .equal:
                 return $0.id < $1.id
-            case .GreaterThan:
+            case .greaterThan:
                 return false
             }
-        })
+        }, isEqual: { $0 === $1 })
         #if TRACE_RESOURCES
-            AtomicIncrement(&resourceCount)
+            let _ = Resources.incrementTotal()
         #endif
     }
 
@@ -72,7 +63,7 @@ public class VirtualTimeScheduler<Converter: VirtualTimeConverterType>
     - parameter action: Action to be executed.
     - returns: The disposable object used to cancel the scheduled action (best effort).
     */
-    public func schedule<StateType>(state: StateType, action: StateType -> Disposable) -> Disposable {
+    public func schedule<StateType>(_ state: StateType, action: @escaping (StateType) -> Disposable) -> Disposable {
         return self.scheduleRelative(state, dueTime: 0.0) { a in
             return action(a)
         }
@@ -86,8 +77,8 @@ public class VirtualTimeScheduler<Converter: VirtualTimeConverterType>
      - parameter action: Action to be executed.
      - returns: The disposable object used to cancel the scheduled action (best effort).
      */
-    public func scheduleRelative<StateType>(state: StateType, dueTime: RxTimeInterval, action: StateType -> Disposable) -> Disposable {
-        let time = self.now.dateByAddingTimeInterval(dueTime)
+    public func scheduleRelative<StateType>(_ state: StateType, dueTime: RxTimeInterval, action: @escaping (StateType) -> Disposable) -> Disposable {
+        let time = self.now.addingTimeInterval(dueTime)
         let absoluteTime = _converter.convertToVirtualTime(time)
         let adjustedTime = self.adjustScheduledTime(absoluteTime)
         return scheduleAbsoluteVirtual(state, time: adjustedTime, action: action)
@@ -101,8 +92,8 @@ public class VirtualTimeScheduler<Converter: VirtualTimeConverterType>
      - parameter action: Action to be executed.
      - returns: The disposable object used to cancel the scheduled action (best effort).
      */
-    public func scheduleRelativeVirtual<StateType>(state: StateType, dueTime: VirtualTimeInterval, action: StateType -> Disposable) -> Disposable {
-        let time = _converter.offsetVirtualTime(time: self.clock, offset: dueTime)
+    public func scheduleRelativeVirtual<StateType>(_ state: StateType, dueTime: VirtualTimeInterval, action: @escaping (StateType) -> Disposable) -> Disposable {
+        let time = _converter.offsetVirtualTime(self.clock, offset: dueTime)
         return scheduleAbsoluteVirtual(state, time: time, action: action)
     }
 
@@ -114,7 +105,7 @@ public class VirtualTimeScheduler<Converter: VirtualTimeConverterType>
      - parameter action: Action to be executed.
      - returns: The disposable object used to cancel the scheduled action (best effort).
      */
-    public func scheduleAbsoluteVirtual<StateType>(state: StateType, time: Converter.VirtualTimeUnit, action: StateType -> Disposable) -> Disposable {
+    public func scheduleAbsoluteVirtual<StateType>(_ state: StateType, time: Converter.VirtualTimeUnit, action: @escaping (StateType) -> Disposable) -> Disposable {
         MainScheduler.ensureExecutingOnScheduler()
 
         let compositeDisposable = CompositeDisposable()
@@ -128,21 +119,17 @@ public class VirtualTimeScheduler<Converter: VirtualTimeConverterType>
 
         _schedulerQueue.enqueue(item)
         
-        compositeDisposable.addDisposable(item)
+        _ = compositeDisposable.insert(item)
         
         return compositeDisposable
     }
 
-    /**
-    Adjusts time of scheduling before adding item to schedule queue.
-    */
-    public func adjustScheduledTime(time: Converter.VirtualTimeUnit) -> Converter.VirtualTimeUnit {
+    /// Adjusts time of scheduling before adding item to schedule queue.
+    open func adjustScheduledTime(_ time: Converter.VirtualTimeUnit) -> Converter.VirtualTimeUnit {
         return time
     }
 
-    /**
-    Starts the virtual time scheduler.
-    */
+    /// Starts the virtual time scheduler.
     public func start() {
         MainScheduler.ensureExecutingOnScheduler()
 
@@ -169,7 +156,7 @@ public class VirtualTimeScheduler<Converter: VirtualTimeConverterType>
 
     func findNext() -> VirtualSchedulerItem<VirtualTime>? {
         while let front = _schedulerQueue.peek() {
-            if front.disposed {
+            if front.isDisposed {
                 _schedulerQueue.remove(front)
                 continue
             }
@@ -180,12 +167,10 @@ public class VirtualTimeScheduler<Converter: VirtualTimeConverterType>
         return nil
     }
 
-    /**
-     Advances the scheduler's clock to the specified time, running all work till that point.
-     
-     - parameter virtualTime: Absolute time to advance the scheduler's clock to.
-    */
-    public func advanceTo(virtualTime: VirtualTime) {
+    /// Advances the scheduler's clock to the specified time, running all work till that point.
+    ///
+    /// - parameter virtualTime: Absolute time to advance the scheduler's clock to.
+    public func advanceTo(_ virtualTime: VirtualTime) {
         MainScheduler.ensureExecutingOnScheduler()
 
         if _running {
@@ -214,13 +199,11 @@ public class VirtualTimeScheduler<Converter: VirtualTimeConverterType>
         _running = false
     }
 
-    /**
-    Advances the scheduler's clock by the specified relative time.
-    */
-    public func sleep(virtualInterval: VirtualTimeInterval) {
+    /// Advances the scheduler's clock by the specified relative time.
+    public func sleep(_ virtualInterval: VirtualTimeInterval) {
         MainScheduler.ensureExecutingOnScheduler()
 
-        let sleepTo = _converter.offsetVirtualTime(time: clock, offset: virtualInterval)
+        let sleepTo = _converter.offsetVirtualTime(clock, offset: virtualInterval)
         if _converter.compareVirtualTime(sleepTo, clock).lessThen {
             fatalError("Can't sleep to past.")
         }
@@ -228,9 +211,7 @@ public class VirtualTimeScheduler<Converter: VirtualTimeConverterType>
         _clock = sleepTo
     }
 
-    /**
-    Stops the virtual time scheduler.
-    */
+    /// Stops the virtual time scheduler.
     public func stop() {
         MainScheduler.ensureExecutingOnScheduler()
 
@@ -239,17 +220,15 @@ public class VirtualTimeScheduler<Converter: VirtualTimeConverterType>
 
     #if TRACE_RESOURCES
         deinit {
-            AtomicDecrement(&resourceCount)
+            _ = Resources.decrementTotal()
         }
     #endif
 }
 
 // MARK: description
 
-extension VirtualTimeScheduler {
-    /**
-    A textual representation of `self`, suitable for debugging.
-    */
+extension VirtualTimeScheduler: CustomDebugStringConvertible {
+    /// A textual representation of `self`, suitable for debugging.
     public var debugDescription: String {
         return self._schedulerQueue.debugDescription
     }
@@ -263,20 +242,20 @@ class VirtualSchedulerItem<Time>
     let time: Time
     let id: Int
 
-    var disposed: Bool {
-        return disposable.disposed
+    var isDisposed: Bool {
+        return disposable.isDisposed
     }
     
     var disposable = SingleAssignmentDisposable()
     
-    init(action: Action, time: Time, id: Int) {
+    init(action: @escaping Action, time: Time, id: Int) {
         self.action = action
         self.time = time
         self.id = id
     }
 
     func invoke() {
-         self.disposable.disposable = action()
+         self.disposable.setDisposable(action())
     }
     
     func dispose() {
@@ -289,4 +268,4 @@ extension VirtualSchedulerItem
     var debugDescription: String {
         return "\(time)"
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Subjects/BehaviorSubject.swift b/Example/Pods/RxSwift/RxSwift/Subjects/BehaviorSubject.swift
index 7df7c7a..8ea1251 100644
--- a/Example/Pods/RxSwift/RxSwift/Subjects/BehaviorSubject.swift
+++ b/Example/Pods/RxSwift/RxSwift/Subjects/BehaviorSubject.swift
@@ -8,11 +8,9 @@
 
 import Foundation
 
-/**
-Represents a value that changes over time.
-
-Observers can subscribe to the subject to receive the last (or initial) value and all subsequent notifications.
-*/
+/// Represents a value that changes over time.
+///
+/// Observers can subscribe to the subject to receive the last (or initial) value and all subsequent notifications.
 public final class BehaviorSubject<Element>
     : Observable<Element>
     , SubjectType
@@ -22,39 +20,39 @@ public final class BehaviorSubject<Element>
     public typealias SubjectObserverType = BehaviorSubject<Element>
     typealias DisposeKey = Bag<AnyObserver<Element>>.KeyType
     
+    /// Indicates whether the subject has any observers
+    public var hasObservers: Bool {
+        _lock.lock(); defer { _lock.unlock() }
+        return _observers.count > 0
+    }
+    
     let _lock = NSRecursiveLock()
     
     // state
-    private var _disposed = false
+    private var _isDisposed = false
     private var _value: Element
     private var _observers = Bag<AnyObserver<Element>>()
     private var _stoppedEvent: Event<Element>?
 
-    /**
-    Indicates whether the subject has been disposed.
-    */
-    public var disposed: Bool {
-        return _disposed
+    /// Indicates whether the subject has been disposed.
+    public var isDisposed: Bool {
+        return _isDisposed
     }
  
-    /**
-    Initializes a new instance of the subject that caches its last value and starts with the specified value.
-    
-    - parameter value: Initial value sent to observers when no other value has been received by the subject yet.
-    */
+    /// Initializes a new instance of the subject that caches its last value and starts with the specified value.
+    ///
+    /// - parameter value: Initial value sent to observers when no other value has been received by the subject yet.
     public init(value: Element) {
         _value = value
     }
     
-    /**
-    Gets the current value or throws an error.
-    
-    - returns: Latest value.
-    */
+    /// Gets the current value or throws an error.
+    ///
+    /// - returns: Latest value.
     public func value() throws -> Element {
         _lock.lock(); defer { _lock.unlock() } // {
-            if _disposed {
-                throw RxError.Disposed(object: self)
+            if _isDisposed {
+                throw RxError.disposed(object: self)
             }
             
             if let error = _stoppedEvent?.error {
@@ -67,87 +65,79 @@ public final class BehaviorSubject<Element>
         //}
     }
     
-    /**
-    Notifies all subscribed observers about next event.
-    
-    - parameter event: Event to send to the observers.
-    */
-    public func on(event: Event<E>) {
-        _lock.lock(); defer { _lock.unlock() }
-        _synchronized_on(event)
+    /// Notifies all subscribed observers about next event.
+    ///
+    /// - parameter event: Event to send to the observers.
+    public func on(_ event: Event<E>) {
+        _synchronized_on(event).on(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
-        if _stoppedEvent != nil || _disposed {
-            return
+    func _synchronized_on(_ event: Event<E>) -> Bag<AnyObserver<Element>> {
+        _lock.lock(); defer { _lock.unlock() }
+        if _stoppedEvent != nil || _isDisposed {
+            return Bag()
         }
         
         switch event {
-        case .Next(let value):
+        case .next(let value):
             _value = value
-        case .Error, .Completed:
+        case .error, .completed:
             _stoppedEvent = event
         }
         
-        _observers.on(event)
+        return _observers
     }
     
-    /**
-    Subscribes an observer to the subject.
-    
-    - parameter observer: Observer to subscribe to the subject.
-    - returns: Disposable object that can be used to unsubscribe the observer from the subject.
-    */
-    public override func subscribe<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
+    /// Subscribes an observer to the subject.
+    ///
+    /// - parameter observer: Observer to subscribe to the subject.
+    /// - returns: Disposable object that can be used to unsubscribe the observer from the subject.
+    public override func subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == Element {
         _lock.lock(); defer { _lock.unlock() }
         return _synchronized_subscribe(observer)
     }
 
-    func _synchronized_subscribe<O : ObserverType where O.E == E>(observer: O) -> Disposable {
-        if _disposed {
-            observer.on(.Error(RxError.Disposed(object: self)))
-            return NopDisposable.instance
+    func _synchronized_subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == E {
+        if _isDisposed {
+            observer.on(.error(RxError.disposed(object: self)))
+            return Disposables.create()
         }
         
         if let stoppedEvent = _stoppedEvent {
             observer.on(stoppedEvent)
-            return NopDisposable.instance
+            return Disposables.create()
         }
         
         let key = _observers.insert(observer.asObserver())
-        observer.on(.Next(_value))
+        observer.on(.next(_value))
     
         return SubscriptionDisposable(owner: self, key: key)
     }
 
-    func synchronizedUnsubscribe(disposeKey: DisposeKey) {
+    func synchronizedUnsubscribe(_ disposeKey: DisposeKey) {
         _lock.lock(); defer { _lock.unlock() }
         _synchronized_unsubscribe(disposeKey)
     }
 
-    func _synchronized_unsubscribe(disposeKey: DisposeKey) {
-        if _disposed {
+    func _synchronized_unsubscribe(_ disposeKey: DisposeKey) {
+        if _isDisposed {
             return
         }
 
         _ = _observers.removeKey(disposeKey)
     }
 
-    /**
-    Returns observer interface for subject.
-    */
+    /// Returns observer interface for subject.
     public func asObserver() -> BehaviorSubject<Element> {
         return self
     }
 
-    /**
-    Unsubscribe all observers and release resources.
-    */
+    /// Unsubscribe all observers and release resources.
     public func dispose() {
         _lock.performLocked {
-            _disposed = true
+            _isDisposed = true
             _observers.removeAll()
             _stoppedEvent = nil
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Subjects/PublishSubject.swift b/Example/Pods/RxSwift/RxSwift/Subjects/PublishSubject.swift
index 797be52..ec82315 100644
--- a/Example/Pods/RxSwift/RxSwift/Subjects/PublishSubject.swift
+++ b/Example/Pods/RxSwift/RxSwift/Subjects/PublishSubject.swift
@@ -1,6 +1,6 @@
 //
 //  PublishSubject.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 2/11/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,11 +8,9 @@
 
 import Foundation
 
-/**
-Represents an object that is both an observable sequence as well as an observer.
-
-Each notification is broadcasted to all subscribed observers.
-*/
+/// Represents an object that is both an observable sequence as well as an observer.
+///
+/// Each notification is broadcasted to all subscribed observers.
 final public class PublishSubject<Element>
     : Observable<Element>
     , SubjectType
@@ -23,53 +21,57 @@ final public class PublishSubject<Element>
     
     typealias DisposeKey = Bag<AnyObserver<Element>>.KeyType
     
+    /// Indicates whether the subject has any observers
+    public var hasObservers: Bool {
+        _lock.lock(); defer { _lock.unlock() }
+        return _observers.count > 0
+    }
+    
     private var _lock = NSRecursiveLock()
     
     // state
-    private var _disposed = false
+    private var _isDisposed = false
     private var _observers = Bag<AnyObserver<Element>>()
     private var _stopped = false
     private var _stoppedEvent = nil as Event<Element>?
     
-    /**
-    Indicates whether the subject has been disposed.
-    */
-    public var disposed: Bool {
-        return _disposed
+    /// Indicates whether the subject has been isDisposed.
+    public var isDisposed: Bool {
+        return _isDisposed
     }
     
-    /**
-    Creates a subject.
-    */
+    /// Creates a subject.
     public override init() {
         super.init()
     }
     
-    /**
-    Notifies all subscribed observers about next event.
-    
-    - parameter event: Event to send to the observers.
-    */
-    public func on(event: Event<Element>) {
-        _lock.lock(); defer { _lock.unlock() }
-        _synchronized_on(event)
+    /// Notifies all subscribed observers about next event.
+    ///
+    /// - parameter event: Event to send to the observers.
+    public func on(_ event: Event<Element>) {
+        _synchronized_on(event).on(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
+    func _synchronized_on(_ event: Event<E>) -> Bag<AnyObserver<Element>> {
+        _lock.lock(); defer { _lock.unlock() }
+
         switch event {
-        case .Next(_):
-            if _disposed || _stopped {
-                return
+        case .next(_):
+            if _isDisposed || _stopped {
+                return Bag()
             }
             
-            _observers.on(event)
-        case .Completed, .Error:
+            return _observers
+        case .completed, .error:
             if _stoppedEvent == nil {
                 _stoppedEvent = event
                 _stopped = true
-                _observers.on(event)
+                let observers = _observers
                 _observers.removeAll()
+                return observers
             }
+
+            return Bag()
         }
     }
     
@@ -79,53 +81,49 @@ final public class PublishSubject<Element>
     - parameter observer: Observer to subscribe to the subject.
     - returns: Disposable object that can be used to unsubscribe the observer from the subject.
     */
-    public override func subscribe<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
+    public override func subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == Element {
         _lock.lock(); defer { _lock.unlock() }
         return _synchronized_subscribe(observer)
     }
 
-    func _synchronized_subscribe<O : ObserverType where O.E == E>(observer: O) -> Disposable {
+    func _synchronized_subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == E {
         if let stoppedEvent = _stoppedEvent {
             observer.on(stoppedEvent)
-            return NopDisposable.instance
+            return Disposables.create()
         }
         
-        if _disposed {
-            observer.on(.Error(RxError.Disposed(object: self)))
-            return NopDisposable.instance
+        if _isDisposed {
+            observer.on(.error(RxError.disposed(object: self)))
+            return Disposables.create()
         }
         
         let key = _observers.insert(observer.asObserver())
         return SubscriptionDisposable(owner: self, key: key)
     }
 
-    func synchronizedUnsubscribe(disposeKey: DisposeKey) {
+    func synchronizedUnsubscribe(_ disposeKey: DisposeKey) {
         _lock.lock(); defer { _lock.unlock() }
         _synchronized_unsubscribe(disposeKey)
     }
 
-    func _synchronized_unsubscribe(disposeKey: DisposeKey) {
+    func _synchronized_unsubscribe(_ disposeKey: DisposeKey) {
         _ = _observers.removeKey(disposeKey)
     }
     
-    /**
-    Returns observer interface for subject.
-    */
+    /// Returns observer interface for subject.
     public func asObserver() -> PublishSubject<Element> {
         return self
     }
     
-    /**
-    Unsubscribe all observers and release resources.
-    */
+    /// Unsubscribe all observers and release resources.
     public func dispose() {
         _lock.lock(); defer { _lock.unlock() }
         _synchronized_dispose()
     }
 
     final func _synchronized_dispose() {
-        _disposed = true
+        _isDisposed = true
         _observers.removeAll()
         _stoppedEvent = nil
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Subjects/ReplaySubject.swift b/Example/Pods/RxSwift/RxSwift/Subjects/ReplaySubject.swift
index 0e883a3..775f9d0 100644
--- a/Example/Pods/RxSwift/RxSwift/Subjects/ReplaySubject.swift
+++ b/Example/Pods/RxSwift/RxSwift/Subjects/ReplaySubject.swift
@@ -8,11 +8,9 @@
 
 import Foundation
 
-/**
-Represents an object that is both an observable sequence as well as an observer.
-
-Each notification is broadcasted to all subscribed and future observers, subject to buffer trimming policies.
-*/
+/// Represents an object that is both an observable sequence as well as an observer.
+///
+/// Each notification is broadcasted to all subscribed and future observers, subject to buffer trimming policies.
 public class ReplaySubject<Element>
     : Observable<Element>
     , SubjectType
@@ -20,41 +18,46 @@ public class ReplaySubject<Element>
     , Disposable {
     public typealias SubjectObserverType = ReplaySubject<Element>
     
+    /// Indicates whether the subject has any observers
+    public var hasObservers: Bool {
+        _lock.lock(); defer { _lock.unlock() }
+        return _observers.count > 0
+    }
+    
+    fileprivate var _lock = NSRecursiveLock()
+    
+    // state
+    fileprivate var _isDisposed = false
+    fileprivate var _stoppedEvent = nil as Event<Element>?
+    fileprivate var _observers = Bag<AnyObserver<Element>>()
+    
     typealias DisposeKey = Bag<AnyObserver<Element>>.KeyType
     
-    func unsubscribe(key: DisposeKey) {
+    func unsubscribe(_ key: DisposeKey) {
         abstractMethod()
     }
     
-    /**
-    Notifies all subscribed observers about next event.
-    
-    - parameter event: Event to send to the observers.
-    */
-    public func on(event: Event<E>) {
+    /// Notifies all subscribed observers about next event.
+    ///
+    /// - parameter event: Event to send to the observers.
+    public func on(_ event: Event<E>) {
         abstractMethod()
     }
     
-    /**
-    Returns observer interface for subject.
-    */
+    /// Returns observer interface for subject.
     public func asObserver() -> SubjectObserverType {
         return self
     }
     
-    /**
-    Unsubscribe all observers and release resources.
-    */
+    /// Unsubscribe all observers and release resources.
     public func dispose() {
     }
 
-    /**
-    Creates new instance of `ReplaySubject` that replays at most `bufferSize` last elements of sequence.
-    
-    - parameter bufferSize: Maximal number of elements to replay to observer after subscription.
-    - returns: New instance of replay subject.
-    */
-    public static func create(bufferSize bufferSize: Int) -> ReplaySubject<Element> {
+    /// Creates new instance of `ReplaySubject` that replays at most `bufferSize` last elements of sequence.
+    ///
+    /// - parameter bufferSize: Maximal number of elements to replay to observer after subscription.
+    /// - returns: New instance of replay subject.
+    public static func create(bufferSize: Int) -> ReplaySubject<Element> {
         if bufferSize == 1 {
             return ReplayOne()
         }
@@ -63,11 +66,9 @@ public class ReplaySubject<Element>
         }
     }
 
-    /**
-    Creates a new instance of `ReplaySubject` that buffers all the elements of a sequence.
-    To avoid filling up memory, developer needs to make sure that the use case will only ever store a 'reasonable'
-    number of elements.
-    */
+    /// Creates a new instance of `ReplaySubject` that buffers all the elements of a sequence.
+    /// To avoid filling up memory, developer needs to make sure that the use case will only ever store a 'reasonable'
+    /// number of elements.
     public static func createUnbounded() -> ReplaySubject<Element> {
         return ReplayAll()
     }
@@ -77,61 +78,55 @@ class ReplayBufferBase<Element>
     : ReplaySubject<Element>
     , SynchronizedUnsubscribeType {
     
-    private var _lock = NSRecursiveLock()
-
-    // state
-    private var _disposed = false
-    private var _stoppedEvent = nil as Event<Element>?
-    private var _observers = Bag<AnyObserver<Element>>()
-    
     func trim() {
         abstractMethod()
     }
     
-    func addValueToBuffer(value: Element) {
+    func addValueToBuffer(_ value: Element) {
         abstractMethod()
     }
     
-    func replayBuffer(observer: AnyObserver<Element>) {
+    func replayBuffer(_ observer: AnyObserver<Element>) {
         abstractMethod()
     }
     
-    override func on(event: Event<Element>) {
-        _lock.lock(); defer { _lock.unlock() }
-        _synchronized_on(event)
+    override func on(_ event: Event<Element>) {
+        _synchronized_on(event).on(event)
     }
 
-    func _synchronized_on(event: Event<E>) {
-        if _disposed {
-            return
+    func _synchronized_on(_ event: Event<E>) -> Bag<AnyObserver<Element>> {
+        _lock.lock(); defer { _lock.unlock() }
+        if _isDisposed {
+            return Bag()
         }
         
         if _stoppedEvent != nil {
-            return
+            return Bag()
         }
         
         switch event {
-        case .Next(let value):
+        case .next(let value):
             addValueToBuffer(value)
             trim()
-            _observers.on(event)
-        case .Error, .Completed:
+            return _observers
+        case .error, .completed:
             _stoppedEvent = event
             trim()
-            _observers.on(event)
+            let observers = _observers
             _observers.removeAll()
+            return observers
         }
     }
     
-    override func subscribe<O : ObserverType where O.E == Element>(observer: O) -> Disposable {
+    override func subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == Element {
         _lock.lock(); defer { _lock.unlock() }
         return _synchronized_subscribe(observer)
     }
 
-    func _synchronized_subscribe<O : ObserverType where O.E == E>(observer: O) -> Disposable {
-        if _disposed {
-            observer.on(.Error(RxError.Disposed(object: self)))
-            return NopDisposable.instance
+    func _synchronized_subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == E {
+        if _isDisposed {
+            observer.on(.error(RxError.disposed(object: self)))
+            return Disposables.create()
         }
      
         let AnyObserver = observer.asObserver()
@@ -139,7 +134,7 @@ class ReplayBufferBase<Element>
         replayBuffer(AnyObserver)
         if let stoppedEvent = _stoppedEvent {
             observer.on(stoppedEvent)
-            return NopDisposable.instance
+            return Disposables.create()
         }
         else {
             let key = _observers.insert(AnyObserver)
@@ -147,13 +142,13 @@ class ReplayBufferBase<Element>
         }
     }
 
-    func synchronizedUnsubscribe(disposeKey: DisposeKey) {
+    func synchronizedUnsubscribe(_ disposeKey: DisposeKey) {
         _lock.lock(); defer { _lock.unlock() }
         _synchronized_unsubscribe(disposeKey)
     }
 
-    func _synchronized_unsubscribe(disposeKey: DisposeKey) {
-        if _disposed {
+    func _synchronized_unsubscribe(_ disposeKey: DisposeKey) {
+        if _isDisposed {
             return
         }
         
@@ -172,7 +167,7 @@ class ReplayBufferBase<Element>
     }
 
     func _synchronized_dispose() {
-        _disposed = true
+        _isDisposed = true
         _stoppedEvent = nil
         _observers.removeAll()
     }
@@ -189,13 +184,13 @@ final class ReplayOne<Element> : ReplayBufferBase<Element> {
         
     }
     
-    override func addValueToBuffer(value: Element) {
+    override func addValueToBuffer(_ value: Element) {
         _value = value
     }
     
-    override func replayBuffer(observer: AnyObserver<Element>) {
+    override func replayBuffer(_ observer: AnyObserver<Element>) {
         if let value = _value {
-            observer.on(.Next(value))
+            observer.on(.next(value))
         }
     }
 
@@ -206,19 +201,19 @@ final class ReplayOne<Element> : ReplayBufferBase<Element> {
 }
 
 class ReplayManyBase<Element> : ReplayBufferBase<Element> {
-    private var _queue: Queue<Element>
+    fileprivate var _queue: Queue<Element>
     
     init(queueSize: Int) {
         _queue = Queue(capacity: queueSize + 1)
     }
     
-    override func addValueToBuffer(value: Element) {
+    override func addValueToBuffer(_ value: Element) {
         _queue.enqueue(value)
     }
     
-    override func replayBuffer(observer: AnyObserver<E>) {
+    override func replayBuffer(_ observer: AnyObserver<E>) {
         for item in _queue {
-            observer.on(.Next(item))
+            observer.on(.next(item))
         }
     }
 
@@ -239,7 +234,7 @@ final class ReplayMany<Element> : ReplayManyBase<Element> {
     
     override func trim() {
         while _queue.count > _bufferSize {
-            _queue.dequeue()
+            _ = _queue.dequeue()
         }
     }
 }
@@ -252,4 +247,4 @@ final class ReplayAll<Element> : ReplayManyBase<Element> {
     override func trim() {
         
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Subjects/SubjectType.swift b/Example/Pods/RxSwift/RxSwift/Subjects/SubjectType.swift
index 51bdfeb..8a508ae 100644
--- a/Example/Pods/RxSwift/RxSwift/Subjects/SubjectType.swift
+++ b/Example/Pods/RxSwift/RxSwift/Subjects/SubjectType.swift
@@ -1,6 +1,6 @@
 //
 //  SubjectType.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/1/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,21 +8,16 @@
 
 import Foundation
 
-/**
-Represents an object that is both an observable sequence as well as an observer.
-*/
+/// Represents an object that is both an observable sequence as well as an observer.
 public protocol SubjectType : ObservableType {
-    /**
-    The type of the observer that represents this subject.
-    
-    Usually this type is type of subject itself, but it doesn't have to be.
-    */
+    /// The type of the observer that represents this subject.
+    ///
+    /// Usually this type is type of subject itself, but it doesn't have to be.
     associatedtype SubjectObserverType : ObserverType
-    
-    /**
-    Returns observer interface for subject.
-    
-    - returns: Observer interface for subject.
-    */
+
+    /// Returns observer interface for subject.
+    ///
+    /// - returns: Observer interface for subject.
     func asObserver() -> SubjectObserverType
-}
\ No newline at end of file
+    
+}
diff --git a/Example/Pods/RxSwift/RxSwift/Subjects/Variable.swift b/Example/Pods/RxSwift/RxSwift/Subjects/Variable.swift
index c329584..93b72a7 100644
--- a/Example/Pods/RxSwift/RxSwift/Subjects/Variable.swift
+++ b/Example/Pods/RxSwift/RxSwift/Subjects/Variable.swift
@@ -1,6 +1,6 @@
 //
 //  Variable.swift
-//  Rx
+//  RxSwift
 //
 //  Created by Krunoslav Zaher on 3/28/15.
 //  Copyright © 2015 Krunoslav Zaher. All rights reserved.
@@ -8,12 +8,10 @@
 
 import Foundation
 
-/**
-Variable is a wrapper for `BehaviorSubject`.
-
-Unlike `BehaviorSubject` it can't terminate with error, and when variable is deallocated
- it will complete it's observable sequence (`asObservable`).
-*/
+/// Variable is a wrapper for `BehaviorSubject`.
+///
+/// Unlike `BehaviorSubject` it can't terminate with error, and when variable is deallocated
+/// it will complete it's observable sequence (`asObservable`).
 public class Variable<Element> {
 
     public typealias E = Element
@@ -25,13 +23,11 @@ public class Variable<Element> {
     // state
     private var _value: E
     
-    /**
-    Gets or sets current value of variable.
-    
-    Whenever a new value is set, all the observers are notified of the change.
-    
-    Even if the newly set value is same as the old value, observers are still notified for change.
-    */
+    /// Gets or sets current value of variable.
+    ///
+    /// Whenever a new value is set, all the observers are notified of the change.
+    ///
+    /// Even if the newly set value is same as the old value, observers are still notified for change.
     public var value: E {
         get {
             _lock.lock(); defer { _lock.unlock() }
@@ -42,28 +38,24 @@ public class Variable<Element> {
             _value = newValue
             _lock.unlock()
 
-            _subject.on(.Next(newValue))
+            _subject.on(.next(newValue))
         }
     }
     
-    /**
-    Initializes variable with initial value.
-    
-    - parameter value: Initial variable value.
-    */
+    /// Initializes variable with initial value.
+    ///
+    /// - parameter value: Initial variable value.
     public init(_ value: Element) {
         _value = value
         _subject = BehaviorSubject(value: value)
     }
     
-    /**
-    - returns: Canonical interface for push style sequence
-    */
+    /// - returns: Canonical interface for push style sequence
     public func asObservable() -> Observable<E> {
         return _subject
     }
 
     deinit {
-        _subject.on(.Completed)
+        _subject.on(.completed)
     }
-}
\ No newline at end of file
+}
diff --git a/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher-dummy.m b/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher-dummy.m
new file mode 100644
index 0000000..13d68b3
--- /dev/null
+++ b/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher-dummy.m	
@@ -0,0 +1,5 @@
+#import <Foundation/Foundation.h>
+@interface PodsDummy_GTMSessionFetcher : NSObject
+@end
+@implementation PodsDummy_GTMSessionFetcher
+@end
diff --git a/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher-prefix.pch b/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher-prefix.pch
new file mode 100644
index 0000000..aa992a4
--- /dev/null
+++ b/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher-prefix.pch	
@@ -0,0 +1,4 @@
+#ifdef __OBJC__
+#import <UIKit/UIKit.h>
+#endif
+
diff --git a/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher-umbrella.h b/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher-umbrella.h
new file mode 100644
index 0000000..3a5f536
--- /dev/null
+++ b/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher-umbrella.h	
@@ -0,0 +1,12 @@
+#ifdef __OBJC__
+#import <UIKit/UIKit.h>
+#endif
+
+#import "GTMSessionFetcher.h"
+#import "GTMSessionFetcherLogging.h"
+#import "GTMSessionFetcherService.h"
+#import "GTMSessionUploadFetcher.h"
+
+FOUNDATION_EXPORT double GTMSessionFetcherVersionNumber;
+FOUNDATION_EXPORT const unsigned char GTMSessionFetcherVersionString[];
+
diff --git a/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher.modulemap b/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher.modulemap
new file mode 100644
index 0000000..5121a4d
--- /dev/null
+++ b/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher.modulemap	
@@ -0,0 +1,6 @@
+framework module GTMSessionFetcher {
+  umbrella header "GTMSessionFetcher-umbrella.h"
+
+  export *
+  module * { export * }
+}
diff --git a/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher.xcconfig b/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher.xcconfig
new file mode 100644
index 0000000..b4acaab
--- /dev/null
+++ b/Example/Pods/Target Support Files/GTMSessionFetcher/GTMSessionFetcher.xcconfig	
@@ -0,0 +1,9 @@
+CONFIGURATION_BUILD_DIR = $PODS_CONFIGURATION_BUILD_DIR/GTMSessionFetcher
+GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
+HEADER_SEARCH_PATHS = "${PODS_ROOT}/Headers/Private" "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/Firebase" "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" "${PODS_ROOT}/Headers/Public/FirebaseAuth" "${PODS_ROOT}/Headers/Public/FirebaseCore" "${PODS_ROOT}/Headers/Public/FirebaseDatabase" "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" "${PODS_ROOT}/Headers/Public/FirebaseRemoteConfig" "${PODS_ROOT}/Headers/Public/FirebaseStorage" "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities"
+OTHER_LDFLAGS = -framework "Security"
+PODS_BUILD_DIR = $BUILD_DIR
+PODS_CONFIGURATION_BUILD_DIR = $PODS_BUILD_DIR/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
+PODS_ROOT = ${SRCROOT}
+PRODUCT_BUNDLE_IDENTIFIER = org.cocoapods.${PRODUCT_NAME:rfc1034identifier}
+SKIP_INSTALL = YES
diff --git a/Example/Pods/Target Support Files/GTMSessionFetcher/Info.plist b/Example/Pods/Target Support Files/GTMSessionFetcher/Info.plist
new file mode 100644
index 0000000..ff7aa59
--- /dev/null
+++ b/Example/Pods/Target Support Files/GTMSessionFetcher/Info.plist	
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>${EXECUTABLE_NAME}</string>
+  <key>CFBundleIdentifier</key>
+  <string>${PRODUCT_BUNDLE_IDENTIFIER}</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>${PRODUCT_NAME}</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>1.1.7</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>${CURRENT_PROJECT_VERSION}</string>
+  <key>NSPrincipalClass</key>
+  <string></string>
+</dict>
+</plist>
diff --git a/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac-dummy.m b/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac-dummy.m
new file mode 100644
index 0000000..9e35ec0
--- /dev/null
+++ b/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac-dummy.m	
@@ -0,0 +1,5 @@
+#import <Foundation/Foundation.h>
+@interface PodsDummy_GoogleToolboxForMac : NSObject
+@end
+@implementation PodsDummy_GoogleToolboxForMac
+@end
diff --git a/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac-prefix.pch b/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac-prefix.pch
new file mode 100644
index 0000000..aa992a4
--- /dev/null
+++ b/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac-prefix.pch	
@@ -0,0 +1,4 @@
+#ifdef __OBJC__
+#import <UIKit/UIKit.h>
+#endif
+
diff --git a/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac-umbrella.h b/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac-umbrella.h
new file mode 100644
index 0000000..4ace9de
--- /dev/null
+++ b/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac-umbrella.h	
@@ -0,0 +1,15 @@
+#ifdef __OBJC__
+#import <UIKit/UIKit.h>
+#endif
+
+#import "GTMDebugSelectorValidation.h"
+#import "GTMDebugThreadValidation.h"
+#import "GTMMethodCheck.h"
+#import "GTMDefines.h"
+#import "GTMNSData+zlib.h"
+#import "GTMNSDictionary+URLArguments.h"
+#import "GTMNSString+URLArguments.h"
+
+FOUNDATION_EXPORT double GoogleToolboxForMacVersionNumber;
+FOUNDATION_EXPORT const unsigned char GoogleToolboxForMacVersionString[];
+
diff --git a/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac.modulemap b/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac.modulemap
new file mode 100644
index 0000000..3245b6d
--- /dev/null
+++ b/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac.modulemap	
@@ -0,0 +1,6 @@
+framework module GoogleToolboxForMac {
+  umbrella header "GoogleToolboxForMac-umbrella.h"
+
+  export *
+  module * { export * }
+}
diff --git a/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac.xcconfig b/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac.xcconfig
new file mode 100644
index 0000000..d68d503
--- /dev/null
+++ b/Example/Pods/Target Support Files/GoogleToolboxForMac/GoogleToolboxForMac.xcconfig	
@@ -0,0 +1,9 @@
+CONFIGURATION_BUILD_DIR = $PODS_CONFIGURATION_BUILD_DIR/GoogleToolboxForMac
+GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
+HEADER_SEARCH_PATHS = "${PODS_ROOT}/Headers/Private" "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/Firebase" "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" "${PODS_ROOT}/Headers/Public/FirebaseAuth" "${PODS_ROOT}/Headers/Public/FirebaseCore" "${PODS_ROOT}/Headers/Public/FirebaseDatabase" "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" "${PODS_ROOT}/Headers/Public/FirebaseRemoteConfig" "${PODS_ROOT}/Headers/Public/FirebaseStorage" "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities"
+OTHER_LDFLAGS = -l"z"
+PODS_BUILD_DIR = $BUILD_DIR
+PODS_CONFIGURATION_BUILD_DIR = $PODS_BUILD_DIR/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
+PODS_ROOT = ${SRCROOT}
+PRODUCT_BUNDLE_IDENTIFIER = org.cocoapods.${PRODUCT_NAME:rfc1034identifier}
+SKIP_INSTALL = YES
diff --git a/Example/Pods/Target Support Files/GoogleToolboxForMac/Info.plist b/Example/Pods/Target Support Files/GoogleToolboxForMac/Info.plist
new file mode 100644
index 0000000..7f71fff
--- /dev/null
+++ b/Example/Pods/Target Support Files/GoogleToolboxForMac/Info.plist	
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>${EXECUTABLE_NAME}</string>
+  <key>CFBundleIdentifier</key>
+  <string>${PRODUCT_BUNDLE_IDENTIFIER}</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>${PRODUCT_NAME}</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>2.1.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>${CURRENT_PROJECT_VERSION}</string>
+  <key>NSPrincipalClass</key>
+  <string></string>
+</dict>
+</plist>
diff --git a/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-acknowledgements.markdown b/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-acknowledgements.markdown
index ee2681b..a271128 100644
--- a/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-acknowledgements.markdown	
+++ b/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-acknowledgements.markdown	
@@ -3,15 +3,19 @@ This application makes use of the following third party libraries:
 
 ## Firebase
 
-Copyright 2016 Google Inc.
+Copyright 2016 Google
 
 ## FirebaseAnalytics
 
-Copyright 2016 Google Inc.
+Copyright 2016 Google
 
 ## FirebaseAuth
 
-Copyright 2016 Google Inc. All Rights Reserved.
+Copyright 2016 Google
+
+## FirebaseCore
+
+Copyright 2016 Google
 
 ## FirebaseDatabase
 
@@ -19,23 +23,435 @@ Copyright 2016 Google
 
 ## FirebaseInstanceID
 
-Copyright 2016 Google Inc.
+Copyright 2016 Google
 
-## GoogleInterchangeUtilities
+## FirebaseRemoteConfig
+
+Copyright 2016 Google
+
+## FirebaseStorage
+
+Copyright 2016 Google
+
+## GTMSessionFetcher
+
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
 
-Copyright 2015 Google Inc.
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
 
-## GoogleNetworkingUtilities
+   Copyright [yyyy] [name of copyright owner]
 
-Copyright 2015 Google Inc.
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+
+## GoogleInterchangeUtilities
+
+Copyright 2016 Google
 
 ## GoogleSymbolUtilities
 
-Copyright 2015 Google Inc.
+Copyright 2016 Google
+
+## GoogleToolboxForMac
+
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
 
-## GoogleUtilities
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
 
-Copyright 2015 Google Inc.
 
 ## RxFirebase
 
diff --git a/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-acknowledgements.plist b/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-acknowledgements.plist
index 9e1bc92..10bc135 100644
--- a/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-acknowledgements.plist	
+++ b/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-acknowledgements.plist	
@@ -14,7 +14,9 @@
 		</dict>
 		<dict>
 			<key>FooterText</key>
-			<string>Copyright 2016 Google Inc.</string>
+			<string>Copyright 2016 Google</string>
+			<key>License</key>
+			<string>Copyright</string>
 			<key>Title</key>
 			<string>Firebase</string>
 			<key>Type</key>
@@ -22,7 +24,9 @@
 		</dict>
 		<dict>
 			<key>FooterText</key>
-			<string>Copyright 2016 Google Inc.</string>
+			<string>Copyright 2016 Google</string>
+			<key>License</key>
+			<string>Copyright</string>
 			<key>Title</key>
 			<string>FirebaseAnalytics</string>
 			<key>Type</key>
@@ -30,7 +34,9 @@
 		</dict>
 		<dict>
 			<key>FooterText</key>
-			<string>Copyright 2016 Google Inc. All Rights Reserved.</string>
+			<string>Copyright 2016 Google</string>
+			<key>License</key>
+			<string>Copyright</string>
 			<key>Title</key>
 			<string>FirebaseAuth</string>
 			<key>Type</key>
@@ -39,6 +45,18 @@
 		<dict>
 			<key>FooterText</key>
 			<string>Copyright 2016 Google</string>
+			<key>License</key>
+			<string>Copyright</string>
+			<key>Title</key>
+			<string>FirebaseCore</string>
+			<key>Type</key>
+			<string>PSGroupSpecifier</string>
+		</dict>
+		<dict>
+			<key>FooterText</key>
+			<string>Copyright 2016 Google</string>
+			<key>License</key>
+			<string>Copyright</string>
 			<key>Title</key>
 			<string>FirebaseDatabase</string>
 			<key>Type</key>
@@ -46,7 +64,9 @@
 		</dict>
 		<dict>
 			<key>FooterText</key>
-			<string>Copyright 2016 Google Inc.</string>
+			<string>Copyright 2016 Google</string>
+			<key>License</key>
+			<string>Copyright</string>
 			<key>Title</key>
 			<string>FirebaseInstanceID</string>
 			<key>Type</key>
@@ -54,23 +74,251 @@
 		</dict>
 		<dict>
 			<key>FooterText</key>
-			<string>Copyright 2015 Google Inc.</string>
+			<string>Copyright 2016 Google</string>
+			<key>License</key>
+			<string>Copyright</string>
 			<key>Title</key>
-			<string>GoogleInterchangeUtilities</string>
+			<string>FirebaseRemoteConfig</string>
 			<key>Type</key>
 			<string>PSGroupSpecifier</string>
 		</dict>
 		<dict>
 			<key>FooterText</key>
-			<string>Copyright 2015 Google Inc.</string>
+			<string>Copyright 2016 Google</string>
+			<key>License</key>
+			<string>Copyright</string>
 			<key>Title</key>
-			<string>GoogleNetworkingUtilities</string>
+			<string>FirebaseStorage</string>
 			<key>Type</key>
 			<string>PSGroupSpecifier</string>
 		</dict>
 		<dict>
 			<key>FooterText</key>
-			<string>Copyright 2015 Google Inc.</string>
+			<string>
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+</string>
+			<key>License</key>
+			<string>Apache</string>
+			<key>Title</key>
+			<string>GTMSessionFetcher</string>
+			<key>Type</key>
+			<string>PSGroupSpecifier</string>
+		</dict>
+		<dict>
+			<key>FooterText</key>
+			<string>Copyright 2016 Google</string>
+			<key>License</key>
+			<string>Copyright</string>
+			<key>Title</key>
+			<string>GoogleInterchangeUtilities</string>
+			<key>Type</key>
+			<string>PSGroupSpecifier</string>
+		</dict>
+		<dict>
+			<key>FooterText</key>
+			<string>Copyright 2016 Google</string>
+			<key>License</key>
+			<string>Copyright</string>
 			<key>Title</key>
 			<string>GoogleSymbolUtilities</string>
 			<key>Type</key>
@@ -78,9 +326,213 @@
 		</dict>
 		<dict>
 			<key>FooterText</key>
-			<string>Copyright 2015 Google Inc.</string>
+			<string>
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+</string>
+			<key>License</key>
+			<string>Apache</string>
 			<key>Title</key>
-			<string>GoogleUtilities</string>
+			<string>GoogleToolboxForMac</string>
 			<key>Type</key>
 			<string>PSGroupSpecifier</string>
 		</dict>
@@ -106,6 +558,8 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 </string>
+			<key>License</key>
+			<string>MIT</string>
 			<key>Title</key>
 			<string>RxFirebase</string>
 			<key>Type</key>
@@ -122,6 +576,8 @@ Permission is hereby granted, free of charge, to any person obtaining a copy of
 The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</string>
+			<key>License</key>
+			<string>MIT</string>
 			<key>Title</key>
 			<string>RxSwift</string>
 			<key>Type</key>
diff --git a/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-frameworks.sh b/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-frameworks.sh
index ecb7a65..4a57c6b 100755
--- a/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-frameworks.sh	
+++ b/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-frameworks.sh	
@@ -84,10 +84,14 @@ strip_invalid_archs() {
 
 
 if [[ "$CONFIGURATION" == "Debug" ]]; then
+  install_framework "$BUILT_PRODUCTS_DIR/GTMSessionFetcher/GTMSessionFetcher.framework"
+  install_framework "$BUILT_PRODUCTS_DIR/GoogleToolboxForMac/GoogleToolboxForMac.framework"
   install_framework "$BUILT_PRODUCTS_DIR/RxFirebase/RxFirebase.framework"
   install_framework "$BUILT_PRODUCTS_DIR/RxSwift/RxSwift.framework"
 fi
 if [[ "$CONFIGURATION" == "Release" ]]; then
+  install_framework "$BUILT_PRODUCTS_DIR/GTMSessionFetcher/GTMSessionFetcher.framework"
+  install_framework "$BUILT_PRODUCTS_DIR/GoogleToolboxForMac/GoogleToolboxForMac.framework"
   install_framework "$BUILT_PRODUCTS_DIR/RxFirebase/RxFirebase.framework"
   install_framework "$BUILT_PRODUCTS_DIR/RxSwift/RxSwift.framework"
 fi
diff --git a/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-resources.sh b/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-resources.sh
index e768f92..25e9d37 100755
--- a/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-resources.sh	
+++ b/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-resources.sh	
@@ -23,12 +23,6 @@ case "${TARGETED_DEVICE_FAMILY}" in
     ;;
 esac
 
-realpath() {
-  DIRECTORY="$(cd "${1%/*}" && pwd)"
-  FILENAME="${1##*/}"
-  echo "$DIRECTORY/$FILENAME"
-}
-
 install_resource()
 {
   if [[ "$1" = /* ]] ; then
@@ -48,8 +42,8 @@ EOM
       ibtool --reference-external-strings-file --errors --warnings --notices --minimum-deployment-target ${!DEPLOYMENT_TARGET_SETTING_NAME} --output-format human-readable-text --compile "${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}/`basename \"$RESOURCE_PATH\" .storyboard`.storyboardc" "$RESOURCE_PATH" --sdk "${SDKROOT}" ${TARGET_DEVICE_ARGS}
       ;;
     *.xib)
-      echo "ibtool --reference-external-strings-file --errors --warnings --notices --minimum-deployment-target ${!DEPLOYMENT_TARGET_SETTING_NAME} --output-format human-readable-text --compile ${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}/`basename \"$RESOURCE_PATH\" .xib`.nib $RESOURCE_PATH --sdk ${SDKROOT}"
-      ibtool --reference-external-strings-file --errors --warnings --notices --minimum-deployment-target ${!DEPLOYMENT_TARGET_SETTING_NAME} --output-format human-readable-text --compile "${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}/`basename \"$RESOURCE_PATH\" .xib`.nib" "$RESOURCE_PATH" --sdk "${SDKROOT}"
+      echo "ibtool --reference-external-strings-file --errors --warnings --notices --minimum-deployment-target ${!DEPLOYMENT_TARGET_SETTING_NAME} --output-format human-readable-text --compile ${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}/`basename \"$RESOURCE_PATH\" .xib`.nib $RESOURCE_PATH --sdk ${SDKROOT} ${TARGET_DEVICE_ARGS}"
+      ibtool --reference-external-strings-file --errors --warnings --notices --minimum-deployment-target ${!DEPLOYMENT_TARGET_SETTING_NAME} --output-format human-readable-text --compile "${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}/`basename \"$RESOURCE_PATH\" .xib`.nib" "$RESOURCE_PATH" --sdk "${SDKROOT}" ${TARGET_DEVICE_ARGS}
       ;;
     *.framework)
       echo "mkdir -p ${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}"
@@ -70,7 +64,7 @@ EOM
       xcrun mapc "$RESOURCE_PATH" "${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}/`basename "$RESOURCE_PATH" .xcmappingmodel`.cdm"
       ;;
     *.xcassets)
-      ABSOLUTE_XCASSET_FILE=$(realpath "$RESOURCE_PATH")
+      ABSOLUTE_XCASSET_FILE="$RESOURCE_PATH"
       XCASSET_FILES+=("$ABSOLUTE_XCASSET_FILE")
       ;;
     *)
@@ -93,7 +87,7 @@ then
   # Find all other xcassets (this unfortunately includes those of path pods and other targets).
   OTHER_XCASSETS=$(find "$PWD" -iname "*.xcassets" -type d)
   while read line; do
-    if [[ $line != "`realpath $PODS_ROOT`*" ]]; then
+    if [[ $line != "${PODS_ROOT}*" ]]; then
       XCASSET_FILES+=("$line")
     fi
   done <<<"$OTHER_XCASSETS"
diff --git a/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-umbrella.h b/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-umbrella.h
index 528053f..268a770 100644
--- a/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-umbrella.h	
+++ b/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-umbrella.h	
@@ -1,4 +1,6 @@
+#ifdef __OBJC__
 #import <UIKit/UIKit.h>
+#endif
 
 
 FOUNDATION_EXPORT double Pods_RxFirebase_ExampleVersionNumber;
diff --git a/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example.debug.xcconfig b/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example.debug.xcconfig
index 14d055f..3d5edb2 100644
--- a/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example.debug.xcconfig	
+++ b/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example.debug.xcconfig	
@@ -1,10 +1,11 @@
+ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES
 EMBEDDED_CONTENT_CONTAINS_SWIFT = YES
-FRAMEWORK_SEARCH_PATHS = $(inherited) '$(PODS_ROOT)/FirebaseDatabase' "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase" "$PODS_CONFIGURATION_BUILD_DIR/RxSwift" "${PODS_ROOT}/FirebaseAnalytics/Frameworks" "${PODS_ROOT}/FirebaseAuth/Frameworks" "${PODS_ROOT}/FirebaseDatabase/Frameworks" "${PODS_ROOT}/FirebaseInstanceID/Frameworks" "${PODS_ROOT}/GoogleInterchangeUtilities/Frameworks" "${PODS_ROOT}/GoogleNetworkingUtilities/Frameworks" "${PODS_ROOT}/GoogleSymbolUtilities/Frameworks" "${PODS_ROOT}/GoogleUtilities/Frameworks"
+FRAMEWORK_SEARCH_PATHS = $(inherited) "$PODS_CONFIGURATION_BUILD_DIR/GTMSessionFetcher" "$PODS_CONFIGURATION_BUILD_DIR/GoogleToolboxForMac" "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase" "$PODS_CONFIGURATION_BUILD_DIR/RxSwift" "${PODS_ROOT}/FirebaseAnalytics/Frameworks/frameworks" "${PODS_ROOT}/FirebaseAuth/Frameworks/frameworks" "${PODS_ROOT}/FirebaseCore/Frameworks/frameworks" "${PODS_ROOT}/FirebaseDatabase/Frameworks" "${PODS_ROOT}/FirebaseInstanceID/Frameworks/frameworks" "${PODS_ROOT}/FirebaseRemoteConfig/Frameworks/frameworks" "${PODS_ROOT}/FirebaseStorage/Frameworks/frameworks" "${PODS_ROOT}/GoogleInterchangeUtilities/Frameworks/frameworks" "${PODS_ROOT}/GoogleSymbolUtilities/Frameworks/frameworks"
 GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
-HEADER_SEARCH_PATHS = $(inherited) ${PODS_ROOT}/Firebase/Headers $(inherited) "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/Firebase" "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" "${PODS_ROOT}/Headers/Public/FirebaseAuth" "${PODS_ROOT}/Headers/Public/FirebaseDatabase" "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" "${PODS_ROOT}/Headers/Public/GoogleNetworkingUtilities" "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities" "${PODS_ROOT}/Headers/Public/GoogleUtilities"
+HEADER_SEARCH_PATHS = $(inherited) ${PODS_ROOT}/Firebase/Core/Sources $(inherited) "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/Firebase" "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" "${PODS_ROOT}/Headers/Public/FirebaseAuth" "${PODS_ROOT}/Headers/Public/FirebaseCore" "${PODS_ROOT}/Headers/Public/FirebaseDatabase" "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" "${PODS_ROOT}/Headers/Public/FirebaseRemoteConfig" "${PODS_ROOT}/Headers/Public/FirebaseStorage" "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities"
 LD_RUNPATH_SEARCH_PATHS = $(inherited) '@executable_path/Frameworks' '@loader_path/Frameworks'
-OTHER_CFLAGS = $(inherited) -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase/RxFirebase.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxSwift/RxSwift.framework/Headers" -isystem "${PODS_ROOT}/Headers/Public" -isystem "${PODS_ROOT}/Headers/Public/Firebase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAuth" -isystem "${PODS_ROOT}/Headers/Public/FirebaseDatabase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" -isystem "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleNetworkingUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleUtilities"
-OTHER_LDFLAGS = $(inherited) -ObjC -l"c++" -l"icucore" -l"sqlite3" -l"z" -framework "AdSupport" -framework "AddressBook" -framework "CFNetwork" -framework "CoreGraphics" -framework "FirebaseAnalytics" -framework "FirebaseAuth" -framework "FirebaseDatabase" -framework "FirebaseInstanceID" -framework "GoogleInterchangeUtilities" -framework "GoogleNetworkingUtilities" -framework "GoogleSymbolUtilities" -framework "GoogleUtilities" -framework "RxFirebase" -framework "RxSwift" -framework "SafariServices" -framework "Security" -framework "StoreKit" -framework "SystemConfiguration"
+OTHER_CFLAGS = $(inherited) -iquote "$PODS_CONFIGURATION_BUILD_DIR/GTMSessionFetcher/GTMSessionFetcher.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/GoogleToolboxForMac/GoogleToolboxForMac.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase/RxFirebase.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxSwift/RxSwift.framework/Headers" -isystem "${PODS_ROOT}/Headers/Public" -isystem "${PODS_ROOT}/Headers/Public/Firebase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAuth" -isystem "${PODS_ROOT}/Headers/Public/FirebaseCore" -isystem "${PODS_ROOT}/Headers/Public/FirebaseDatabase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" -isystem "${PODS_ROOT}/Headers/Public/FirebaseRemoteConfig" -isystem "${PODS_ROOT}/Headers/Public/FirebaseStorage" -isystem "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities"
+OTHER_LDFLAGS = $(inherited) -ObjC -l"c++" -l"icucore" -l"sqlite3" -l"z" -framework "AddressBook" -framework "CFNetwork" -framework "FirebaseAnalytics" -framework "FirebaseAuth" -framework "FirebaseCore" -framework "FirebaseDatabase" -framework "FirebaseInstanceID" -framework "FirebaseRemoteConfig" -framework "FirebaseStorage" -framework "GTMSessionFetcher" -framework "GoogleInterchangeUtilities" -framework "GoogleSymbolUtilities" -framework "GoogleToolboxForMac" -framework "MobileCoreServices" -framework "RxFirebase" -framework "RxSwift" -framework "Security" -framework "StoreKit" -framework "SystemConfiguration"
 OTHER_SWIFT_FLAGS = $(inherited) "-D" "COCOAPODS"
 PODS_BUILD_DIR = $BUILD_DIR
 PODS_CONFIGURATION_BUILD_DIR = $PODS_BUILD_DIR/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
diff --git a/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example.release.xcconfig b/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example.release.xcconfig
index 14d055f..3d5edb2 100644
--- a/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example.release.xcconfig	
+++ b/Example/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example.release.xcconfig	
@@ -1,10 +1,11 @@
+ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES
 EMBEDDED_CONTENT_CONTAINS_SWIFT = YES
-FRAMEWORK_SEARCH_PATHS = $(inherited) '$(PODS_ROOT)/FirebaseDatabase' "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase" "$PODS_CONFIGURATION_BUILD_DIR/RxSwift" "${PODS_ROOT}/FirebaseAnalytics/Frameworks" "${PODS_ROOT}/FirebaseAuth/Frameworks" "${PODS_ROOT}/FirebaseDatabase/Frameworks" "${PODS_ROOT}/FirebaseInstanceID/Frameworks" "${PODS_ROOT}/GoogleInterchangeUtilities/Frameworks" "${PODS_ROOT}/GoogleNetworkingUtilities/Frameworks" "${PODS_ROOT}/GoogleSymbolUtilities/Frameworks" "${PODS_ROOT}/GoogleUtilities/Frameworks"
+FRAMEWORK_SEARCH_PATHS = $(inherited) "$PODS_CONFIGURATION_BUILD_DIR/GTMSessionFetcher" "$PODS_CONFIGURATION_BUILD_DIR/GoogleToolboxForMac" "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase" "$PODS_CONFIGURATION_BUILD_DIR/RxSwift" "${PODS_ROOT}/FirebaseAnalytics/Frameworks/frameworks" "${PODS_ROOT}/FirebaseAuth/Frameworks/frameworks" "${PODS_ROOT}/FirebaseCore/Frameworks/frameworks" "${PODS_ROOT}/FirebaseDatabase/Frameworks" "${PODS_ROOT}/FirebaseInstanceID/Frameworks/frameworks" "${PODS_ROOT}/FirebaseRemoteConfig/Frameworks/frameworks" "${PODS_ROOT}/FirebaseStorage/Frameworks/frameworks" "${PODS_ROOT}/GoogleInterchangeUtilities/Frameworks/frameworks" "${PODS_ROOT}/GoogleSymbolUtilities/Frameworks/frameworks"
 GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
-HEADER_SEARCH_PATHS = $(inherited) ${PODS_ROOT}/Firebase/Headers $(inherited) "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/Firebase" "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" "${PODS_ROOT}/Headers/Public/FirebaseAuth" "${PODS_ROOT}/Headers/Public/FirebaseDatabase" "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" "${PODS_ROOT}/Headers/Public/GoogleNetworkingUtilities" "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities" "${PODS_ROOT}/Headers/Public/GoogleUtilities"
+HEADER_SEARCH_PATHS = $(inherited) ${PODS_ROOT}/Firebase/Core/Sources $(inherited) "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/Firebase" "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" "${PODS_ROOT}/Headers/Public/FirebaseAuth" "${PODS_ROOT}/Headers/Public/FirebaseCore" "${PODS_ROOT}/Headers/Public/FirebaseDatabase" "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" "${PODS_ROOT}/Headers/Public/FirebaseRemoteConfig" "${PODS_ROOT}/Headers/Public/FirebaseStorage" "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities"
 LD_RUNPATH_SEARCH_PATHS = $(inherited) '@executable_path/Frameworks' '@loader_path/Frameworks'
-OTHER_CFLAGS = $(inherited) -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase/RxFirebase.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxSwift/RxSwift.framework/Headers" -isystem "${PODS_ROOT}/Headers/Public" -isystem "${PODS_ROOT}/Headers/Public/Firebase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAuth" -isystem "${PODS_ROOT}/Headers/Public/FirebaseDatabase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" -isystem "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleNetworkingUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleUtilities"
-OTHER_LDFLAGS = $(inherited) -ObjC -l"c++" -l"icucore" -l"sqlite3" -l"z" -framework "AdSupport" -framework "AddressBook" -framework "CFNetwork" -framework "CoreGraphics" -framework "FirebaseAnalytics" -framework "FirebaseAuth" -framework "FirebaseDatabase" -framework "FirebaseInstanceID" -framework "GoogleInterchangeUtilities" -framework "GoogleNetworkingUtilities" -framework "GoogleSymbolUtilities" -framework "GoogleUtilities" -framework "RxFirebase" -framework "RxSwift" -framework "SafariServices" -framework "Security" -framework "StoreKit" -framework "SystemConfiguration"
+OTHER_CFLAGS = $(inherited) -iquote "$PODS_CONFIGURATION_BUILD_DIR/GTMSessionFetcher/GTMSessionFetcher.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/GoogleToolboxForMac/GoogleToolboxForMac.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase/RxFirebase.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxSwift/RxSwift.framework/Headers" -isystem "${PODS_ROOT}/Headers/Public" -isystem "${PODS_ROOT}/Headers/Public/Firebase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAuth" -isystem "${PODS_ROOT}/Headers/Public/FirebaseCore" -isystem "${PODS_ROOT}/Headers/Public/FirebaseDatabase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" -isystem "${PODS_ROOT}/Headers/Public/FirebaseRemoteConfig" -isystem "${PODS_ROOT}/Headers/Public/FirebaseStorage" -isystem "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities"
+OTHER_LDFLAGS = $(inherited) -ObjC -l"c++" -l"icucore" -l"sqlite3" -l"z" -framework "AddressBook" -framework "CFNetwork" -framework "FirebaseAnalytics" -framework "FirebaseAuth" -framework "FirebaseCore" -framework "FirebaseDatabase" -framework "FirebaseInstanceID" -framework "FirebaseRemoteConfig" -framework "FirebaseStorage" -framework "GTMSessionFetcher" -framework "GoogleInterchangeUtilities" -framework "GoogleSymbolUtilities" -framework "GoogleToolboxForMac" -framework "MobileCoreServices" -framework "RxFirebase" -framework "RxSwift" -framework "Security" -framework "StoreKit" -framework "SystemConfiguration"
 OTHER_SWIFT_FLAGS = $(inherited) "-D" "COCOAPODS"
 PODS_BUILD_DIR = $BUILD_DIR
 PODS_CONFIGURATION_BUILD_DIR = $PODS_BUILD_DIR/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
diff --git a/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests-resources.sh b/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests-resources.sh
index e768f92..25e9d37 100755
--- a/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests-resources.sh	
+++ b/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests-resources.sh	
@@ -23,12 +23,6 @@ case "${TARGETED_DEVICE_FAMILY}" in
     ;;
 esac
 
-realpath() {
-  DIRECTORY="$(cd "${1%/*}" && pwd)"
-  FILENAME="${1##*/}"
-  echo "$DIRECTORY/$FILENAME"
-}
-
 install_resource()
 {
   if [[ "$1" = /* ]] ; then
@@ -48,8 +42,8 @@ EOM
       ibtool --reference-external-strings-file --errors --warnings --notices --minimum-deployment-target ${!DEPLOYMENT_TARGET_SETTING_NAME} --output-format human-readable-text --compile "${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}/`basename \"$RESOURCE_PATH\" .storyboard`.storyboardc" "$RESOURCE_PATH" --sdk "${SDKROOT}" ${TARGET_DEVICE_ARGS}
       ;;
     *.xib)
-      echo "ibtool --reference-external-strings-file --errors --warnings --notices --minimum-deployment-target ${!DEPLOYMENT_TARGET_SETTING_NAME} --output-format human-readable-text --compile ${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}/`basename \"$RESOURCE_PATH\" .xib`.nib $RESOURCE_PATH --sdk ${SDKROOT}"
-      ibtool --reference-external-strings-file --errors --warnings --notices --minimum-deployment-target ${!DEPLOYMENT_TARGET_SETTING_NAME} --output-format human-readable-text --compile "${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}/`basename \"$RESOURCE_PATH\" .xib`.nib" "$RESOURCE_PATH" --sdk "${SDKROOT}"
+      echo "ibtool --reference-external-strings-file --errors --warnings --notices --minimum-deployment-target ${!DEPLOYMENT_TARGET_SETTING_NAME} --output-format human-readable-text --compile ${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}/`basename \"$RESOURCE_PATH\" .xib`.nib $RESOURCE_PATH --sdk ${SDKROOT} ${TARGET_DEVICE_ARGS}"
+      ibtool --reference-external-strings-file --errors --warnings --notices --minimum-deployment-target ${!DEPLOYMENT_TARGET_SETTING_NAME} --output-format human-readable-text --compile "${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}/`basename \"$RESOURCE_PATH\" .xib`.nib" "$RESOURCE_PATH" --sdk "${SDKROOT}" ${TARGET_DEVICE_ARGS}
       ;;
     *.framework)
       echo "mkdir -p ${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}"
@@ -70,7 +64,7 @@ EOM
       xcrun mapc "$RESOURCE_PATH" "${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}/`basename "$RESOURCE_PATH" .xcmappingmodel`.cdm"
       ;;
     *.xcassets)
-      ABSOLUTE_XCASSET_FILE=$(realpath "$RESOURCE_PATH")
+      ABSOLUTE_XCASSET_FILE="$RESOURCE_PATH"
       XCASSET_FILES+=("$ABSOLUTE_XCASSET_FILE")
       ;;
     *)
@@ -93,7 +87,7 @@ then
   # Find all other xcassets (this unfortunately includes those of path pods and other targets).
   OTHER_XCASSETS=$(find "$PWD" -iname "*.xcassets" -type d)
   while read line; do
-    if [[ $line != "`realpath $PODS_ROOT`*" ]]; then
+    if [[ $line != "${PODS_ROOT}*" ]]; then
       XCASSET_FILES+=("$line")
     fi
   done <<<"$OTHER_XCASSETS"
diff --git a/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests-umbrella.h b/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests-umbrella.h
index fab58c1..55c35b9 100644
--- a/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests-umbrella.h	
+++ b/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests-umbrella.h	
@@ -1,4 +1,6 @@
+#ifdef __OBJC__
 #import <UIKit/UIKit.h>
+#endif
 
 
 FOUNDATION_EXPORT double Pods_RxFirebase_TestsVersionNumber;
diff --git a/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests.debug.xcconfig b/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests.debug.xcconfig
index a87a5d7..31e4f5b 100644
--- a/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests.debug.xcconfig	
+++ b/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests.debug.xcconfig	
@@ -1,8 +1,9 @@
-FRAMEWORK_SEARCH_PATHS = $(inherited) "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase" "$PODS_CONFIGURATION_BUILD_DIR/RxSwift"
+ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = NO
+FRAMEWORK_SEARCH_PATHS = $(inherited) "$PODS_CONFIGURATION_BUILD_DIR/GTMSessionFetcher" "$PODS_CONFIGURATION_BUILD_DIR/GoogleToolboxForMac" "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase" "$PODS_CONFIGURATION_BUILD_DIR/RxSwift"
 GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
-HEADER_SEARCH_PATHS = $(inherited) "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/Firebase" "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" "${PODS_ROOT}/Headers/Public/FirebaseAuth" "${PODS_ROOT}/Headers/Public/FirebaseDatabase" "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" "${PODS_ROOT}/Headers/Public/GoogleNetworkingUtilities" "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities" "${PODS_ROOT}/Headers/Public/GoogleUtilities"
+HEADER_SEARCH_PATHS = $(inherited) "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/Firebase" "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" "${PODS_ROOT}/Headers/Public/FirebaseAuth" "${PODS_ROOT}/Headers/Public/FirebaseCore" "${PODS_ROOT}/Headers/Public/FirebaseDatabase" "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" "${PODS_ROOT}/Headers/Public/FirebaseRemoteConfig" "${PODS_ROOT}/Headers/Public/FirebaseStorage" "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities"
 LD_RUNPATH_SEARCH_PATHS = $(inherited) '@executable_path/Frameworks' '@loader_path/Frameworks'
-OTHER_CFLAGS = $(inherited) -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase/RxFirebase.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxSwift/RxSwift.framework/Headers" -isystem "${PODS_ROOT}/Headers/Public" -isystem "${PODS_ROOT}/Headers/Public/Firebase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAuth" -isystem "${PODS_ROOT}/Headers/Public/FirebaseDatabase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" -isystem "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleNetworkingUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleUtilities"
+OTHER_CFLAGS = $(inherited) -iquote "$PODS_CONFIGURATION_BUILD_DIR/GTMSessionFetcher/GTMSessionFetcher.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/GoogleToolboxForMac/GoogleToolboxForMac.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase/RxFirebase.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxSwift/RxSwift.framework/Headers" -isystem "${PODS_ROOT}/Headers/Public" -isystem "${PODS_ROOT}/Headers/Public/Firebase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAuth" -isystem "${PODS_ROOT}/Headers/Public/FirebaseCore" -isystem "${PODS_ROOT}/Headers/Public/FirebaseDatabase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" -isystem "${PODS_ROOT}/Headers/Public/FirebaseRemoteConfig" -isystem "${PODS_ROOT}/Headers/Public/FirebaseStorage" -isystem "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities"
 PODS_BUILD_DIR = $BUILD_DIR
 PODS_CONFIGURATION_BUILD_DIR = $PODS_BUILD_DIR/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
 PODS_ROOT = ${SRCROOT}/Pods
diff --git a/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests.release.xcconfig b/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests.release.xcconfig
index a87a5d7..31e4f5b 100644
--- a/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests.release.xcconfig	
+++ b/Example/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests.release.xcconfig	
@@ -1,8 +1,9 @@
-FRAMEWORK_SEARCH_PATHS = $(inherited) "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase" "$PODS_CONFIGURATION_BUILD_DIR/RxSwift"
+ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = NO
+FRAMEWORK_SEARCH_PATHS = $(inherited) "$PODS_CONFIGURATION_BUILD_DIR/GTMSessionFetcher" "$PODS_CONFIGURATION_BUILD_DIR/GoogleToolboxForMac" "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase" "$PODS_CONFIGURATION_BUILD_DIR/RxSwift"
 GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
-HEADER_SEARCH_PATHS = $(inherited) "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/Firebase" "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" "${PODS_ROOT}/Headers/Public/FirebaseAuth" "${PODS_ROOT}/Headers/Public/FirebaseDatabase" "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" "${PODS_ROOT}/Headers/Public/GoogleNetworkingUtilities" "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities" "${PODS_ROOT}/Headers/Public/GoogleUtilities"
+HEADER_SEARCH_PATHS = $(inherited) "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/Firebase" "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" "${PODS_ROOT}/Headers/Public/FirebaseAuth" "${PODS_ROOT}/Headers/Public/FirebaseCore" "${PODS_ROOT}/Headers/Public/FirebaseDatabase" "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" "${PODS_ROOT}/Headers/Public/FirebaseRemoteConfig" "${PODS_ROOT}/Headers/Public/FirebaseStorage" "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities"
 LD_RUNPATH_SEARCH_PATHS = $(inherited) '@executable_path/Frameworks' '@loader_path/Frameworks'
-OTHER_CFLAGS = $(inherited) -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase/RxFirebase.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxSwift/RxSwift.framework/Headers" -isystem "${PODS_ROOT}/Headers/Public" -isystem "${PODS_ROOT}/Headers/Public/Firebase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAuth" -isystem "${PODS_ROOT}/Headers/Public/FirebaseDatabase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" -isystem "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleNetworkingUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleUtilities"
+OTHER_CFLAGS = $(inherited) -iquote "$PODS_CONFIGURATION_BUILD_DIR/GTMSessionFetcher/GTMSessionFetcher.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/GoogleToolboxForMac/GoogleToolboxForMac.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxFirebase/RxFirebase.framework/Headers" -iquote "$PODS_CONFIGURATION_BUILD_DIR/RxSwift/RxSwift.framework/Headers" -isystem "${PODS_ROOT}/Headers/Public" -isystem "${PODS_ROOT}/Headers/Public/Firebase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" -isystem "${PODS_ROOT}/Headers/Public/FirebaseAuth" -isystem "${PODS_ROOT}/Headers/Public/FirebaseCore" -isystem "${PODS_ROOT}/Headers/Public/FirebaseDatabase" -isystem "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" -isystem "${PODS_ROOT}/Headers/Public/FirebaseRemoteConfig" -isystem "${PODS_ROOT}/Headers/Public/FirebaseStorage" -isystem "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" -isystem "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities"
 PODS_BUILD_DIR = $BUILD_DIR
 PODS_CONFIGURATION_BUILD_DIR = $PODS_BUILD_DIR/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
 PODS_ROOT = ${SRCROOT}/Pods
diff --git a/Example/Pods/Target Support Files/RxFirebase/RxFirebase-umbrella.h b/Example/Pods/Target Support Files/RxFirebase/RxFirebase-umbrella.h
index 1bd4a10..fccaaa3 100644
--- a/Example/Pods/Target Support Files/RxFirebase/RxFirebase-umbrella.h	
+++ b/Example/Pods/Target Support Files/RxFirebase/RxFirebase-umbrella.h	
@@ -1,4 +1,6 @@
+#ifdef __OBJC__
 #import <UIKit/UIKit.h>
+#endif
 
 
 FOUNDATION_EXPORT double RxFirebaseVersionNumber;
diff --git a/Example/Pods/Target Support Files/RxFirebase/RxFirebase.xcconfig b/Example/Pods/Target Support Files/RxFirebase/RxFirebase.xcconfig
index a6d5288..a933c0b 100644
--- a/Example/Pods/Target Support Files/RxFirebase/RxFirebase.xcconfig	
+++ b/Example/Pods/Target Support Files/RxFirebase/RxFirebase.xcconfig	
@@ -1,8 +1,8 @@
 CONFIGURATION_BUILD_DIR = $PODS_CONFIGURATION_BUILD_DIR/RxFirebase
-FRAMEWORK_SEARCH_PATHS = $(inherited) '$(PODS_ROOT)/FirebaseDatabase' "$PODS_CONFIGURATION_BUILD_DIR/RxSwift"
+FRAMEWORK_SEARCH_PATHS = $(inherited) $(PODS_ROOT)/FirebaseCore/Frameworks $(PODS_ROOT)/FirebaseCore/Frameworks/frameworks $(PODS_ROOT)/FirebaseDatabase/Frameworks $(PODS_ROOT)/FirebaseDatabase/Frameworks/frameworks $(PODS_ROOT)/FirebaseAnalytics/Frameworks $(PODS_ROOT)/FirebaseAnalytics/Frameworks/frameworks $(PODS_ROOT)/FirebaseAuth/Frameworks $(PODS_ROOT)/FirebaseAuth/Frameworks/frameworks $(PODS_ROOT)/FirebaseRemoteConfig/Frameworks $(PODS_ROOT)/FirebaseRemoteConfig/Frameworks/frameworks $(PODS_ROOT)/FirebaseStorage/Frameworks $(PODS_ROOT)/FirebaseStorage/Frameworks/frameworks $(PODS_ROOT)/GoogleSymbolUtilities/Frameworks $(PODS_ROOT)/GoogleSymbolUtilities/Frameworks/frameworks $(PODS_ROOT)/GoogleInterchangeUtilities/Frameworks $(PODS_ROOT)/GoogleInterchangeUtilities/Frameworks/frameworks "$PODS_CONFIGURATION_BUILD_DIR/GTMSessionFetcher" "$PODS_CONFIGURATION_BUILD_DIR/GoogleToolboxForMac" "$PODS_CONFIGURATION_BUILD_DIR/RxSwift"
 GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
-HEADER_SEARCH_PATHS = "${PODS_ROOT}/Headers/Private" "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/Firebase" "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" "${PODS_ROOT}/Headers/Public/FirebaseAuth" "${PODS_ROOT}/Headers/Public/FirebaseDatabase" "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" "${PODS_ROOT}/Headers/Public/GoogleNetworkingUtilities" "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities" "${PODS_ROOT}/Headers/Public/GoogleUtilities"
-OTHER_LDFLAGS = -framework "UIKit"
+HEADER_SEARCH_PATHS = "${PODS_ROOT}/Headers/Private" "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/Firebase" "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" "${PODS_ROOT}/Headers/Public/FirebaseAuth" "${PODS_ROOT}/Headers/Public/FirebaseCore" "${PODS_ROOT}/Headers/Public/FirebaseDatabase" "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" "${PODS_ROOT}/Headers/Public/FirebaseRemoteConfig" "${PODS_ROOT}/Headers/Public/FirebaseStorage" "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities"
+OTHER_LDFLAGS = -framework "FirebaseAnalytics" -framework "FirebaseAuth" -framework "FirebaseCore" -framework "FirebaseDatabase" -framework "FirebaseRemoteConfig" -framework "FirebaseStorage" -framework "GoogleInterchangeUtilities" -framework "GoogleSymbolUtilities"
 OTHER_SWIFT_FLAGS = $(inherited) "-D" "COCOAPODS"
 PODS_BUILD_DIR = $BUILD_DIR
 PODS_CONFIGURATION_BUILD_DIR = $PODS_BUILD_DIR/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
diff --git a/Example/Pods/Target Support Files/RxSwift/Info.plist b/Example/Pods/Target Support Files/RxSwift/Info.plist
index 3e85049..b0b461e 100644
--- a/Example/Pods/Target Support Files/RxSwift/Info.plist	
+++ b/Example/Pods/Target Support Files/RxSwift/Info.plist	
@@ -15,7 +15,7 @@
   <key>CFBundlePackageType</key>
   <string>FMWK</string>
   <key>CFBundleShortVersionString</key>
-  <string>2.5.0</string>
+  <string>3.0.1</string>
   <key>CFBundleSignature</key>
   <string>????</string>
   <key>CFBundleVersion</key>
diff --git a/Example/Pods/Target Support Files/RxSwift/RxSwift-umbrella.h b/Example/Pods/Target Support Files/RxSwift/RxSwift-umbrella.h
index b36f5f1..91c9282 100644
--- a/Example/Pods/Target Support Files/RxSwift/RxSwift-umbrella.h	
+++ b/Example/Pods/Target Support Files/RxSwift/RxSwift-umbrella.h	
@@ -1,4 +1,6 @@
+#ifdef __OBJC__
 #import <UIKit/UIKit.h>
+#endif
 
 
 FOUNDATION_EXPORT double RxSwiftVersionNumber;
diff --git a/Example/Pods/Target Support Files/RxSwift/RxSwift.xcconfig b/Example/Pods/Target Support Files/RxSwift/RxSwift.xcconfig
index 54c9736..9ccf3e5 100644
--- a/Example/Pods/Target Support Files/RxSwift/RxSwift.xcconfig	
+++ b/Example/Pods/Target Support Files/RxSwift/RxSwift.xcconfig	
@@ -1,6 +1,6 @@
 CONFIGURATION_BUILD_DIR = $PODS_CONFIGURATION_BUILD_DIR/RxSwift
 GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
-HEADER_SEARCH_PATHS = "${PODS_ROOT}/Headers/Private" "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/Firebase" "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" "${PODS_ROOT}/Headers/Public/FirebaseAuth" "${PODS_ROOT}/Headers/Public/FirebaseDatabase" "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" "${PODS_ROOT}/Headers/Public/GoogleNetworkingUtilities" "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities" "${PODS_ROOT}/Headers/Public/GoogleUtilities"
+HEADER_SEARCH_PATHS = "${PODS_ROOT}/Headers/Private" "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/Firebase" "${PODS_ROOT}/Headers/Public/FirebaseAnalytics" "${PODS_ROOT}/Headers/Public/FirebaseAuth" "${PODS_ROOT}/Headers/Public/FirebaseCore" "${PODS_ROOT}/Headers/Public/FirebaseDatabase" "${PODS_ROOT}/Headers/Public/FirebaseInstanceID" "${PODS_ROOT}/Headers/Public/FirebaseRemoteConfig" "${PODS_ROOT}/Headers/Public/FirebaseStorage" "${PODS_ROOT}/Headers/Public/GoogleInterchangeUtilities" "${PODS_ROOT}/Headers/Public/GoogleSymbolUtilities"
 OTHER_SWIFT_FLAGS = $(inherited) "-D" "COCOAPODS"
 PODS_BUILD_DIR = $BUILD_DIR
 PODS_CONFIGURATION_BUILD_DIR = $PODS_BUILD_DIR/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
diff --git a/Example/RxFirebase.xcodeproj/project.pbxproj b/Example/RxFirebase.xcodeproj/project.pbxproj
index 7ddc0c1..8b2f881 100644
--- a/Example/RxFirebase.xcodeproj/project.pbxproj
+++ b/Example/RxFirebase.xcodeproj/project.pbxproj
@@ -166,12 +166,12 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 607FACEF1AFB9204008FA782 /* Build configuration list for PBXNativeTarget "RxFirebase_Example" */;
 			buildPhases = (
-				944C8942C3F340DC4365F8B0 /* 📦 Check Pods Manifest.lock */,
+				944C8942C3F340DC4365F8B0 /* [CP] Check Pods Manifest.lock */,
 				607FACCC1AFB9204008FA782 /* Sources */,
 				607FACCD1AFB9204008FA782 /* Frameworks */,
 				607FACCE1AFB9204008FA782 /* Resources */,
-				804855B0613C8BE053B9A624 /* 📦 Embed Pods Frameworks */,
-				98398309EF70B6D10AB630A1 /* 📦 Copy Pods Resources */,
+				804855B0613C8BE053B9A624 /* [CP] Embed Pods Frameworks */,
+				98398309EF70B6D10AB630A1 /* [CP] Copy Pods Resources */,
 			);
 			buildRules = (
 			);
@@ -186,12 +186,12 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 607FACF21AFB9204008FA782 /* Build configuration list for PBXNativeTarget "RxFirebase_Tests" */;
 			buildPhases = (
-				E1FC2347463DB34BCA244A83 /* 📦 Check Pods Manifest.lock */,
+				E1FC2347463DB34BCA244A83 /* [CP] Check Pods Manifest.lock */,
 				607FACE11AFB9204008FA782 /* Sources */,
 				607FACE21AFB9204008FA782 /* Frameworks */,
 				607FACE31AFB9204008FA782 /* Resources */,
-				B95E4D070990B7BF68B72C79 /* 📦 Embed Pods Frameworks */,
-				B168629AC375AE191659CB18 /* 📦 Copy Pods Resources */,
+				B95E4D070990B7BF68B72C79 /* [CP] Embed Pods Frameworks */,
+				B168629AC375AE191659CB18 /* [CP] Copy Pods Resources */,
 			);
 			buildRules = (
 			);
@@ -262,14 +262,14 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
-		804855B0613C8BE053B9A624 /* 📦 Embed Pods Frameworks */ = {
+		804855B0613C8BE053B9A624 /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Embed Pods Frameworks";
+			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -277,29 +277,29 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		944C8942C3F340DC4365F8B0 /* 📦 Check Pods Manifest.lock */ = {
+		944C8942C3F340DC4365F8B0 /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Check Pods Manifest.lock";
+			name = "[CP] Check Pods Manifest.lock";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
+			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
-		98398309EF70B6D10AB630A1 /* 📦 Copy Pods Resources */ = {
+		98398309EF70B6D10AB630A1 /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Copy Pods Resources";
+			name = "[CP] Copy Pods Resources";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -307,14 +307,14 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-RxFirebase_Example/Pods-RxFirebase_Example-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		B168629AC375AE191659CB18 /* 📦 Copy Pods Resources */ = {
+		B168629AC375AE191659CB18 /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Copy Pods Resources";
+			name = "[CP] Copy Pods Resources";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -322,14 +322,14 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		B95E4D070990B7BF68B72C79 /* 📦 Embed Pods Frameworks */ = {
+		B95E4D070990B7BF68B72C79 /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Embed Pods Frameworks";
+			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -337,19 +337,19 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-RxFirebase_Tests/Pods-RxFirebase_Tests-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		E1FC2347463DB34BCA244A83 /* 📦 Check Pods Manifest.lock */ = {
+		E1FC2347463DB34BCA244A83 /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Check Pods Manifest.lock";
+			name = "[CP] Check Pods Manifest.lock";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
+			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
 /* End PBXShellScriptBuildPhase section */
@@ -444,6 +444,7 @@
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 3.0.1;
 			};
 			name = Debug;
 		};
@@ -480,6 +481,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 8.3;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
+				SWIFT_VERSION = 3.0.1;
 				VALIDATE_PRODUCT = YES;
 			};
 			name = Release;
diff --git a/Example/RxFirebase/AppDelegate.swift b/Example/RxFirebase/AppDelegate.swift
index e0932fe..28e0d58 100644
--- a/Example/RxFirebase/AppDelegate.swift
+++ b/Example/RxFirebase/AppDelegate.swift
@@ -13,34 +13,5 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
 
     var window: UIWindow?
 
-
-    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
-        // Override point for customization after application launch.
-        return true
-    }
-
-    func applicationWillResignActive(application: UIApplication) {
-        // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
-        // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
-    }
-
-    func applicationDidEnterBackground(application: UIApplication) {
-        // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
-        // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
-    }
-
-    func applicationWillEnterForeground(application: UIApplication) {
-        // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
-    }
-
-    func applicationDidBecomeActive(application: UIApplication) {
-        // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
-    }
-
-    func applicationWillTerminate(application: UIApplication) {
-        // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
-    }
-
-
 }
 
diff --git a/Example/Tests/Tests.swift b/Example/Tests/Tests.swift
index d6c4e17..ae49954 100644
--- a/Example/Tests/Tests.swift
+++ b/Example/Tests/Tests.swift
@@ -21,7 +21,7 @@ class Tests: XCTestCase {
     
     func testPerformanceExample() {
         // This is an example of a performance test case.
-        self.measureBlock() {
+        self.measure() {
             // Put the code you want to measure the time of here.
         }
     }
diff --git a/RxFirebase.podspec b/RxFirebase.podspec
index 38bae4d..4cfa0b6 100644
--- a/RxFirebase.podspec
+++ b/RxFirebase.podspec
@@ -18,11 +18,10 @@ Pod::Spec.new do |s|
 #   * Finally, don't worry about the indent, CocoaPods strips it!
 
   s.description      = <<-DESC
-This is a library to help you use RxSwift 2.5 or higher with Firebase 3.0 or higher.
+This is a library to help you use RxSwift 3.0 or higher with Firebase 3.0 or higher.
                        DESC
 
   s.homepage         = "https://github.com/RxSwiftCommunity/RxFirebase"
-  # s.screenshots     = "www.example.com/screenshots_1", "www.example.com/screenshots_2"
   s.license          = 'MIT'
   s.author           = { "Maximilian Alexander" => "max@zinkpulse.com" }
   s.source           = { :git => "https://github.com/RxSwiftCommunity/RxFirebase.git", :tag => s.version.to_s }
@@ -32,13 +31,35 @@ This is a library to help you use RxSwift 2.5 or higher with Firebase 3.0 or hig
 
   s.source_files = 'RxFirebase/Classes/**/*'
 
-    s.frameworks = 'UIKit'
-    s.dependency 'RxSwift', '~> 2.5'
-    s.dependency 'Firebase/Database'
-    s.dependency 'Firebase/Auth'
+  s.dependency 'RxSwift', '~> 3.0'
+  s.dependency 'Firebase/Database'
+  s.dependency 'Firebase/Auth'
+  s.dependency 'Firebase/Analytics'
+  s.dependency 'Firebase/RemoteConfig'
+  s.dependency 'Firebase/Storage'
 
-    s.xcconfig = {
-        "FRAMEWORK_SEARCH_PATHS" => "'$(PODS_ROOT)/FirebaseDatabase'"
-    }
-    s.vendored_frameworks = ["${PODS_ROOT}/FirebaseDatabase/Frameworks/FirebaseDatabase.framework"]
+  s.frameworks = 'FirebaseCore', 'FirebaseDatabase', 'FirebaseAnalytics', 'FirebaseAuth', 'FirebaseRemoteConfig', 'FirebaseStorage', 'GoogleSymbolUtilities', 'GoogleInterchangeUtilities'
+
+  frameworks = [
+        '$(PODS_ROOT)/FirebaseCore/Frameworks',
+        '$(PODS_ROOT)/FirebaseCore/Frameworks/frameworks',
+        '$(PODS_ROOT)/FirebaseDatabase/Frameworks',
+        '$(PODS_ROOT)/FirebaseDatabase/Frameworks/frameworks',
+        '$(PODS_ROOT)/FirebaseAnalytics/Frameworks',
+        '$(PODS_ROOT)/FirebaseAnalytics/Frameworks/frameworks',
+        '$(PODS_ROOT)/FirebaseAuth/Frameworks',
+        '$(PODS_ROOT)/FirebaseAuth/Frameworks/frameworks',
+        '$(PODS_ROOT)/FirebaseRemoteConfig/Frameworks',
+        '$(PODS_ROOT)/FirebaseRemoteConfig/Frameworks/frameworks',
+        '$(PODS_ROOT)/FirebaseStorage/Frameworks',
+        '$(PODS_ROOT)/FirebaseStorage/Frameworks/frameworks',
+        '$(PODS_ROOT)/GoogleSymbolUtilities/Frameworks',
+        '$(PODS_ROOT)/GoogleSymbolUtilities/Frameworks/frameworks',
+        '$(PODS_ROOT)/GoogleInterchangeUtilities/Frameworks',
+        '$(PODS_ROOT)/GoogleInterchangeUtilities/Frameworks/frameworks',
+  ]
+
+  s.pod_target_xcconfig = {
+      "FRAMEWORK_SEARCH_PATHS" => frameworks.join(" "),
+  }
 end
diff --git a/RxFirebase/Classes/Extensions.swift b/RxFirebase/Classes/Extensions.swift
new file mode 100644
index 0000000..89b3db4
--- /dev/null
+++ b/RxFirebase/Classes/Extensions.swift
@@ -0,0 +1,86 @@
+//
+//  RxFirebase.swift
+//  Pods
+//
+//  Created by Krunoslav Zaher on 12/7/16.
+//
+//
+
+import Foundation
+import RxSwift
+
+public struct UnknownFirebaseError: Error {
+
+}
+
+func parseFirebaseResponse<T>(_ observer: AnyObserver<T>) -> (T?, Error?) -> () {
+    return { value, error in
+        if let value = value {
+            observer.on(.next(value))
+            observer.on(.completed)
+        }
+        else if let error = error {
+            observer.on(.error(error))
+        }
+        else {
+            observer.on(.error(UnknownFirebaseError()))
+        }
+    }
+}
+
+func parseFirebaseResponse<T>(_ observer: AnyObserver<StorageObservableTask<T>>) -> (T?, Error?) -> () {
+    return { value, error in
+        if let value = value {
+            observer.on(.next(StorageObservableTask(result: value)))
+            observer.on(.completed)
+        }
+        else if let error = error {
+            observer.on(.error(error))
+        }
+        else {
+            observer.on(.error(UnknownFirebaseError()))
+        }
+    }
+}
+
+func parseFirebaseResponse<T>(_ observer: AnyObserver<T>) -> (Error?, T?) -> () {
+    return { error, value in
+        if let value = value {
+            observer.on(.next(value))
+            observer.on(.completed)
+        }
+        else if let error = error {
+            observer.on(.error(error))
+        }
+        else {
+            observer.on(.error(UnknownFirebaseError()))
+        }
+    }
+}
+
+func parseFirebaseResponse<T, T2>(_ observer: AnyObserver<(T2, T)>) -> (Error?, T2, T?) -> () {
+    return { error, value2, value in
+        if let value = value {
+            observer.on(.next((value2, value)))
+            observer.on(.completed)
+        }
+        else if let error = error {
+            observer.on(.error(error))
+        }
+        else {
+            observer.on(.error(UnknownFirebaseError()))
+        }
+    }
+}
+
+func parseFirebaseResponse(_ observer: AnyObserver<()>) -> (Error?) -> () {
+    return { error in
+        if let error = error {
+            observer.on(.error(error))
+        }
+        else {
+            observer.on(.next())
+            observer.on(.completed)
+        }
+    }
+}
diff --git a/RxFirebase/Classes/FIRAuth+Extensions.swift b/RxFirebase/Classes/FIRAuth+Extensions.swift
new file mode 100644
index 0000000..c518f01
--- /dev/null
+++ b/RxFirebase/Classes/FIRAuth+Extensions.swift
@@ -0,0 +1,99 @@
+//
+//  RxFirebaseAuth.swift
+//  RxFirebase
+//
+//  Created by David Wong on 05/19/2016.
+//  Copyright (c) 2016 David Wong. All rights reserved.
+//
+
+import FirebaseAnalytics
+import FirebaseAuth
+import RxSwift
+
+public extension Reactive where Base: FIRAuth {
+    /**
+     Registers for an "auth state did change" observable. Invoked when:
+     - Registered as a listener
+     - The current user changes, or,
+     - The current user's access token changes.
+     */
+    var user: Observable<FIRUser?> {
+        get {
+            return Observable.create { observer in
+                let listener = self.base.addStateDidChangeListener { (auth, user) in
+                    observer.onNext(user)
+                }
+                return Disposables.create {
+                    self.base.removeStateDidChangeListener(listener)
+                }
+            }
+        }
+    }
+    
+    /**
+     Sign in with email address and password.
+     @param email The user's email address.
+     @param password The user's password.
+    */
+    func signIn(withEmail email: String, password: String) -> Observable<FIRUser> {
+        return Observable.create { observer in
+            
+            self.base.signIn(
+                withEmail: email,
+                password: password,
+                completion: parseFirebaseResponse(observer)
+            )
+            
+            return Disposables.create()
+        }
+    }
+    
+    /** 
+        sign in anonymously
+    */
+    func signInAnonymously() -> Observable<FIRUser> {
+        return Observable.create { observer in
+            self.base.signInAnonymously(completion: parseFirebaseResponse(observer))
+            
+            return Disposables.create()
+        }
+    }
+    
+    /**
+     Sign in with credential.
+     @param credentials An instance of FIRAuthCredential (Facebook, Twitter, Github, Google)
+    */
+    func signIn(with credentials: FIRAuthCredential) -> Observable<FIRUser> {
+        return Observable.create { observer in
+            self.base.signIn(with: credentials, completion: parseFirebaseResponse(observer))
+
+            return Disposables.create()
+        }
+    }
+    
+    /**
+     Sign in with custom token.
+     @param A custom token. Please see Firebase's documentation on how to set this up.
+    */
+    func signIn(withCustomToken token: String) -> Observable<FIRUser> {
+        return Observable.create { observer in
+            self.base.signIn(withCustomToken: token, completion: parseFirebaseResponse(observer))
+
+            return Disposables.create()
+        }
+    }
+    
+    /**
+     Create and on success sign in a user with the given email address and password.
+     @param email The user's email address.
+     @param password The user's desired password
+    */
+    func createUser(withEmail email: String, password: String) -> Observable<FIRUser> {
+        return Observable.create { observer in
+            self.base.createUser(withEmail: email, password: password, completion: parseFirebaseResponse(observer))
+
+            return Disposables.create()
+        }
+    }
+    
+}
diff --git a/RxFirebase/Classes/FIRDatabaseQuery+Extensions.swift b/RxFirebase/Classes/FIRDatabaseQuery+Extensions.swift
new file mode 100644
index 0000000..5bd175c
--- /dev/null
+++ b/RxFirebase/Classes/FIRDatabaseQuery+Extensions.swift
@@ -0,0 +1,247 @@
+//
+//  RxFirebaseDatabase.swift
+//  Pods
+//
+//  Created by David Wong on 19/05/2016.
+//
+//
+
+import FirebaseDatabase
+import RxSwift
+
+public extension Reactive where Base: FIRDatabaseQuery {
+    /**
+     Listen for data changes at a particular location.
+     This is the primary way to read data from the Firebase Database. The observers 
+     will be triggered for the initial data and again whenever the data changes.
+     
+     @param eventType The type of event to listen for.
+    */
+    func observe(_ eventType: FIRDataEventType) -> Observable<FIRDataSnapshot> {
+        return Observable.create { observer in
+            let handle = self.base.observe(eventType, with: observer.onNext, withCancel: observer.onError)
+            return Disposables.create {
+                self.base.removeObserver(withHandle: handle)
+            }
+        }
+    }
+    /**
+     Listen for data changes at a particular location. This is the primary way to read data from
+     the Firebase Database. The observers will be triggered for the initial data and again 
+     whenever the data changes. In addition, for FIRDataEventTypeChildAdded,FIRDataEventTypeChildMoved 
+     and FIRDataEventTypeChildChanged, your block will be passed the key of the previous node by
+     priority order.
+     
+     @param eventType The type of event to listen for.
+    */
+    func observeWithPreviousSiblingKey(_ eventType: FIRDataEventType) -> Observable<(FIRDataSnapshot, String?)> {
+        return Observable.create { observer in
+            let handle = self.base.observe(eventType,
+                                           andPreviousSiblingKeyWith: observer.onNext,
+                                           withCancel: observer.onError)
+            return Disposables.create {
+                self.base.removeObserver(withHandle: handle)
+            }
+        }
+    }
+    
+    /**
+     This is equivalent to observe(), except the observer is immediately canceled after the initial data is returned.
+     
+     @param eventType The type of event to listen for.
+    */
+    func observeSingleEvent(of eventType: FIRDataEventType) -> Observable<FIRDataSnapshot> {
+        return Observable.create { observer in
+            self.base.observeSingleEvent(of: eventType, with: { (snapshot) in
+                observer.onNext(snapshot)
+                observer.onCompleted()
+            }, withCancel: observer.onError)
+
+            return Disposables.create()
+        }
+    }
+    
+    /**
+     This is equivalent to observeWithSiblingKey(), except the observer is immediately
+     canceled after the initial data is returned.
+     
+     @param eventType The type of event to listen for.
+    */
+    func observeSingleEvent(of eventType: FIRDataEventType) -> Observable<(FIRDataSnapshot, String?)> {
+        return Observable.create { observer in
+            self.base.observeSingleEvent(of: eventType, andPreviousSiblingKeyWith: { (snapshot, string) in
+                observer.onNext((snapshot, string))
+                observer.onCompleted()
+            }, withCancel: observer.onError)
+            return Disposables.create()
+        }
+    }
+}
+
+public extension Reactive where Base: FIRDatabaseReference {
+    /**
+     Update changes the values at the specified paths in the dictionary without 
+     overwriting other keys at this location
+     
+     @param values A dictionary of keys to change and their new values
+    */
+    func updateChildValues(_ values: [AnyHashable : Any]) -> Observable<FIRDatabaseReference> {
+        return Observable.create { observer in
+            self.base.updateChildValues(values, withCompletionBlock: parseFirebaseResponse(observer))
+            
+            return Disposables.create()
+        }
+    }
+    
+    /**
+     Write data to this Firebase Database location.
+     
+     This will overwrite any data at this location and all child locations.
+     
+     Data types that can be set are:
+     
+     - String / NSString
+     - NSNumber
+     - Dictionary<String: AnyObject> / NSDictionary
+     - Array<Above objects> / NSArray
+     
+     The effect of the write will be visible immediately and the correspoding 
+     events will be triggered. Synchronization of the data to the Firebase Database 
+     servers will also be started.
+     
+     Passing null for the new value is equivalent to calling remove()
+     all data at this location or any child location will be deleted.
+     
+     Note that setValue() will remove any priority stored at this location,
+     so if priority is meant to be preserved, you should use setValue(value:, priority:) instead.
+     
+     @param value The value to be written
+     @param priority The Priority to be attached to the data.
+    */
+    func setValue(_ value: Any?, priority: Any? = nil) -> Observable<FIRDatabaseReference> {
+        return Observable.create { observer in
+            self.base.setValue(value, andPriority: priority, withCompletionBlock: parseFirebaseResponse(observer))
+            return Disposables.create()
+        }
+    }
+    
+    /**
+     Remove the data at this Firebase Database location. Any data at child locations will also be deleted.
+     
+     The effect of the delete will be visible immediately and the corresponding events
+     will be triggered. Synchronization of the delete to the Firebase Database servers will 
+     also be started.
+    */
+    func removeValue() -> Observable<FIRDatabaseReference> {
+        return Observable.create { observer in
+            self.base.removeValue(completionBlock: parseFirebaseResponse(observer))
+            return Disposables.create()
+        }
+    }
+    /**
+     Performs an optimistic-concurrency transactional update to the data at this location. Your block will be called with a FIRMutableData
+     instance that contains the current data at this location. Your block should update this data to the value you
+     wish to write to this location, and then return an instance of FIRTransactionResult with the new data.
+     
+     If, when the operation reaches the server, it turns out that this client had stale data, your block will be run again with the latest data from the server.
+     
+     When your block is run, you may decide to aport the traansaction by return FIRTransactionResult.abort()
+     
+     @param block This block receives the current data at this location and must return an instance of FIRTransactionResult
+    */
+    func runTransactionBlock(block: @escaping ((FIRMutableData) -> FIRTransactionResult)) -> Observable<(Bool, FIRDataSnapshot)> {
+        return Observable.create { observer in
+            self.base.runTransactionBlock(block, andCompletionBlock: parseFirebaseResponse(observer))
+            return Disposables.create()
+        }
+    }
+    
+    /**
+     Set a priority for the data at this Firebase Database location.
+     Priorities can be used to provide a custom ordering for the children at a location
+     (if no priorities are specified, the children are ordered by key).
+     
+     You cannot set a priority on an empty location. For this reason
+     setValue:andPriority: should be used when setting initial data with a specific priority
+     and setPriority: should be used when updating the priority of existing data.
+     
+     Children are sorted based on this priority using the following rules:
+     
+     Children with no priority come first.
+     Children with a number as their priority come next. They are sorted numerically by priority (small to large).
+     Children with a string as their priority come last. They are sorted lexicographically by priority.
+     Whenever two children have the same priority (including no priority), they are sorted by key. Numeric
+     keys come first (sorted numerically), followed by the remaining keys (sorted lexicographically).
+     
+     Note that priorities are parsed and ordered as IEEE 754 double-precision floating-point numbers.
+     Keys are always stored as strings and are treated as numbers only when they can be parsed as a
+     32-bit integer
+     
+     @param priority The priority to set at the specified location.
+     */
+    func setPriority(priority : Any?) -> Observable<FIRDatabaseReference> {
+        return Observable.create { observer in
+            self.base.setPriority(priority, withCompletionBlock: parseFirebaseResponse(observer))
+            return Disposables.create()
+        }
+    }
+    
+    /**
+     Ensure the data at this location is set to the specified value when
+     the client is disconnected (due to closing the browser, navigating
+     to a new page, or network issues).
+     
+     onDisconnectSetValue() is especially useful for implementing "presence" systems,
+     where a value should be changed or cleared when a user disconnects
+     so that he appears "offline" to other users.
+     
+     @param value The value to be set after the connection is lost.
+     @param priority The priority to be set after the connection is lost.
+    */
+    func onDisconnectSetValue(_ value: Any?, andPriority priority: Any? = nil) -> Observable<FIRDatabaseReference> {
+        return Observable.create { observer in
+            self.base.onDisconnectSetValue(value, andPriority: priority, withCompletionBlock: parseFirebaseResponse(observer))
+            return Disposables.create()
+        }
+    }
+    
+    /**
+     Ensure the data has the specified child values updated when
+     the client is disconnected (due to closing the browser, navigating 
+     to a new page, or network issues).
+     
+     @param values A dictionary of child node keys and the values to set them to after the connection is lost.
+    */
+    func onDisconnectUpdateChildValue(_ values: [AnyHashable : Any]) -> Observable<FIRDatabaseReference> {
+        return Observable.create { observer in
+            self.base.onDisconnectUpdateChildValues(values, withCompletionBlock: parseFirebaseResponse(observer))
+            return Disposables.create()
+        }
+    }
+    /**
+     Ensure the data t this location is removed when
+     the client is disconnected (due to closing the app, navigating
+     to a new page, or network issues
+     
+     onDisconnectRemoveValue() is especially useful for implementing "presence systems.
+    */
+    func onDisconnectRemoveValue() -> Observable<FIRDatabaseReference> {
+        return Observable.create { observer in
+            self.base.onDisconnectRemoveValue(completionBlock: parseFirebaseResponse(observer))
+            return Disposables.create()
+        }
+    }
+}
+
+
+public extension ObservableType where E : FIRDataSnapshot {
+    func children() -> Observable<[FIRDataSnapshot]> {
+        return self.map { snapshot in
+            guard let children = snapshot.children.allObjects as? [FIRDataSnapshot] else {
+                throw UnknownFirebaseError()
+            }
+
+            return children
+        }
+    }
+}
diff --git a/RxFirebase/Classes/FIRRemoteConfig+Extensions.swift b/RxFirebase/Classes/FIRRemoteConfig+Extensions.swift
new file mode 100644
index 0000000..2c1d59a
--- /dev/null
+++ b/RxFirebase/Classes/FIRRemoteConfig+Extensions.swift
@@ -0,0 +1,50 @@
+//
+//  RxFirebaseRemoteConfig.swift
+//  Pods
+//
+//  Created by David Wong on 20/05/2016.
+//
+//
+
+import FirebaseRemoteConfig
+import RxSwift
+
+public enum RemoteConfigError: Error {
+    case failedToActivateFetched
+}
+
+public extension Reactive where Base: FIRRemoteConfig {
+    /**
+     Fetches Remote Config data and sets a duration that specifies how long config data lasts.
+     
+     @param expirationDuration  Duration that defines how long fetched config data is available, in seconds. When the config data expires, a new fetch is required.
+     
+    */
+    func fetch(expirationDuration: TimeInterval) -> Observable<FIRRemoteConfigFetchStatus> {
+        return Observable.create { observer in
+            self.base.fetch(withExpirationDuration: expirationDuration, completionHandler: parseFirebaseResponse(observer))
+
+            return Disposables.create()
+        }
+    }
+
+    /**
+     Fetches Remote Config data and sets a duration that specifies how long config data lasts.
+     
+     After remote config is fetched, attempt is made `activateFetched`.
+
+     @param expirationDuration  Duration that defines how long fetched config data is available, in seconds. When the config data expires, a new fetch is required.
+     */
+    func fetchAndActivate(expirationDuration: TimeInterval) -> Observable<()> {
+        return self.fetch(expirationDuration: expirationDuration)
+            .do(onNext: { status in
+                if (status == FIRRemoteConfigFetchStatus.success) {
+                    if !self.base.activateFetched() {
+                        throw RemoteConfigError.failedToActivateFetched
+                    }
+                }
+            })
+            .map { _ in () }
+    }
+
+}
diff --git a/RxFirebase/Classes/FIRStorage+Extensions.swift b/RxFirebase/Classes/FIRStorage+Extensions.swift
new file mode 100644
index 0000000..1c9c9c8
--- /dev/null
+++ b/RxFirebase/Classes/FIRStorage+Extensions.swift
@@ -0,0 +1,221 @@
+//
+//  RxFirebaseStorage.swift
+//  Pods
+//
+//  Created by David Wong on 19/05/2016.
+//
+//
+
+import FirebaseStorage
+import RxSwift
+
+public enum StorageObservableTask<Result> {
+    case result(Result)
+    case inProgress(Observable<FIRStorageTaskSnapshot>)
+}
+
+public protocol StorageObservableTaskConvertible {
+    associatedtype ResultType
+
+    var storageObservableTask: StorageObservableTask<ResultType> {
+        get
+    }
+}
+
+public extension Reactive where Base: FIRStorageReference {
+    // MARK: UPLOAD
+    
+    /**
+     Asynchronously uploads data to the currently specified FIRStorageReference.
+     This is not recommended for large files, and one should instead upload a file from disk.
+     
+     @param uploadData The NSData to upload.
+     @param metadata FIRStorageMetaData containing additional information (MIME type, etc.) about the object being uploaded.
+     
+    */
+    func put(data: Data, metaData: FIRStorageMetadata? = nil) -> Observable<StorageObservableTask<FIRStorageMetadata>> {
+        return Observable.create { observer in
+            let task = self.base.put(data, metadata: metaData, completion: parseFirebaseResponse(observer))
+            observer.onNext(StorageObservableTask(task: task))
+            return Disposables.create {
+                task.cancel()
+            }
+        }
+    }
+
+    /**
+     Asynchronously uploads a file to the currently specified FIRStorageReference.
+     
+     @param fileURL A URL representing the system file path of the object to be uploaded.
+     @param metadata FIRStorageMetadata containing additional information (MIME type, etc.) about the object being uploaded.
+    */
+    func put(fileAtPath: URL, metadata: FIRStorageMetadata? = nil) -> Observable<StorageObservableTask<FIRStorageMetadata>> {
+        return Observable.create { observer in
+            let task = self.base.putFile(fileAtPath, metadata: metadata, completion: parseFirebaseResponse(observer))
+            observer.onNext(StorageObservableTask(task: task))
+            return Disposables.create {
+                task.cancel()
+            }
+        }
+    }
+    
+    // MARK: DOWNLOAD
+    
+    /**
+     Asynchronously downloads the object at the FIRStorageReference to an NSData Object in memory.
+     An NSData of the provided max size will be allocated, so ensure that the device has enough free
+     memory to complete the download. For downloading large files, writeToFile may be a better option.
+     
+     @param size The maximum size in bytes to download.  If the download exceeds this size the task will be cancelled and an error will be returned.
+    */
+    func data(maxSize: Int64 = .max) -> Observable<StorageObservableTask<Data>> {
+        return Observable.create { observer in
+            let task = self.base.data(withMaxSize: maxSize, completion: parseFirebaseResponse(observer))
+            observer.onNext(StorageObservableTask(task: task))
+            return Disposables.create {
+                task.cancel()
+            }
+        }
+    }
+
+    /**
+     Asynchronously downloads the object at the current path to a specified system filepath.
+     
+     @param fileURL A file system URL representing the path the object should be downloaded to.
+    */
+    func write(fileAtPath: URL) -> Observable<StorageObservableTask<URL>> {
+        return Observable.create { observer in
+            let task = self.base.write(toFile: fileAtPath, completion: parseFirebaseResponse(observer))
+            observer.on(.next(StorageObservableTask(task: task)))
+            return Disposables.create {
+                task.cancel()
+            }
+        }
+    }
+    
+    /**
+     Asynchronously retrieves a long lived download URL with a revokable token.
+     This can be used to share the file with others, but can be revoked by a developer
+     in the Firebase Console if desired.
+    */
+    func downloadURL() -> Observable<URL> {
+        return Observable.create { observer in
+            self.base.downloadURL(completion: parseFirebaseResponse(observer))
+            return Disposables.create()
+        }
+    }
+    
+    // MARK: DELETE
+    /**
+     Deletes the object at the current path.
+    */
+    func delete() -> Observable<()> {
+        return Observable.create { observer in
+            self.base.delete(completion: parseFirebaseResponse(observer))
+            return Disposables.create()
+        }
+    }
+    
+    // MARK: METADATA
+    /**
+     Retrieves metadata associated with an object at the current path.
+    */
+    func metadata() -> Observable<FIRStorageMetadata> {
+        return Observable.create { observer in
+            self.base.metadata(completion: parseFirebaseResponse(observer))
+            return Disposables.create()
+        }
+    }
+    
+    /**
+     Updates the metadata associated with an object at the current path.
+     
+     @param metadata An FIRStorageMetadata object with the metadata to update.
+    */
+    func update(metadata: FIRStorageMetadata) -> Observable<FIRStorageMetadata> {
+        return Observable.create { observer in
+            self.base.update(metadata, completion: parseFirebaseResponse(observer))
+            return Disposables.create()
+        }
+    }
+}
+
+extension ObservableType where E: StorageObservableTaskConvertible {
+    public func finalResult() -> Observable<E.ResultType> {
+        return self.flatMapLatest { task -> Observable<E.ResultType> in
+            guard let result = task.storageObservableTask.result else {
+                return Observable.empty()
+            }
+            return Observable.just(result)
+        }
+    }
+}
+
+protocol StorageObservableTaskCompatible {
+
+    func observe(_ status: FIRStorageTaskStatus, handler: @escaping (FIRStorageTaskSnapshot) -> Swift.Void) -> String
+
+    func removeObserver(withHandle handle: String)
+}
+
+extension FIRStorageUploadTask: StorageObservableTaskCompatible {
+
+}
+
+extension FIRStorageDownloadTask: StorageObservableTaskCompatible {
+
+}
+
+extension StorageObservableTaskCompatible {
+    func status(_ status: FIRStorageTaskStatus) -> Observable<FIRStorageTaskSnapshot> {
+        return Observable.create { observer in
+            let observeStatus = self.observe(status, handler: { (snapshot: FIRStorageTaskSnapshot) in
+                if let error = snapshot.error {
+                    observer.onError(error)
+                } else {
+                    observer.onNext(snapshot)
+                    if status == .success {
+                        observer.onCompleted()
+                    }
+                }
+            })
+            return Disposables.create {
+                self.removeObserver(withHandle: observeStatus)
+            }
+        }
+    }
+}
+
+extension StorageObservableTask {
+    public var result: Result? {
+        switch self {
+        case let .result(result):
+            return result
+        default:
+            return nil
+        }
+    }
+}
+
+extension StorageObservableTask {
+    init(task: StorageObservableTaskCompatible) {
+        let progressStatus = task.status(.progress)
+        let successStatus = task.status(.success)
+        let failureStatus = task.status(.failure)
+
+        let allStatuses = Observable.of(progressStatus, successStatus, failureStatus).merge()
+
+        self = .inProgress(allStatuses)
+    }
+
+    init(result: Result) {
+        self = .result(result)
+    }
+}
+
+extension StorageObservableTask: StorageObservableTaskConvertible {
+    public typealias ResultType = Result
+    public var storageObservableTask: StorageObservableTask<Result> {
+        return self
+    }
+}
diff --git a/RxFirebase/Classes/FIRUser+Extensions.swift b/RxFirebase/Classes/FIRUser+Extensions.swift
new file mode 100644
index 0000000..d4a3afc
--- /dev/null
+++ b/RxFirebase/Classes/FIRUser+Extensions.swift
@@ -0,0 +1,22 @@
+//
+//  FirebaseUser.swift
+//  Pods
+//
+//  Created by Krunoslav Zaher on 12/8/16.
+//
+//
+
+import Foundation
+import FirebaseAuth
+import RxSwift
+
+extension Reactive where Base: FIRUser {
+    
+    public func link(with credential: FIRAuthCredential) -> Observable<FIRUser> {
+        return Observable.create { observer in
+            self.base.link(with: credential, completion: parseFirebaseResponse(observer))
+            return Disposables.create()
+        }
+    }
+
+}
diff --git a/RxFirebase/Classes/RxFirebaseAuth.swift b/RxFirebase/Classes/RxFirebaseAuth.swift
deleted file mode 100644
index 75ece4b..0000000
--- a/RxFirebase/Classes/RxFirebaseAuth.swift
+++ /dev/null
@@ -1,130 +0,0 @@
-//
-//  RxFirebaseAuth.swift
-//  RxFirebase
-//
-//  Created by David Wong on 05/19/2016.
-//  Copyright (c) 2016 David Wong. All rights reserved.
-//
-
-import FirebaseAnalytics
-import FirebaseAuth
-import RxSwift
-
-public extension FIRAuth {
-    /**
-     Registers for an "auth state did change" observable. Invoked when:
-     - Registered as a listener
-     - The current user changes, or,
-     - The current user's access token changes.
-     */
-    var rx_addAuthStateDidChangeListener: Observable<(FIRAuth, FIRUser?)> {
-        get {
-            return Observable.create { observer in
-                let listener = self.addAuthStateDidChangeListener({ (auth, user) in
-                    observer.onNext((auth, user))
-                })
-                return AnonymousDisposable {
-                    self.removeAuthStateDidChangeListener(listener)
-                }
-            }
-        }
-    }
-    
-    /**
-     Sign in with email address and password.
-     @param email The user's email address.
-     @param password The user's password.
-    */
-    func rx_signinWithEmail(email: String, password: String) -> Observable<FIRUser?> {
-        return Observable.create { observer in
-            
-            self.signInWithEmail(email, password: password, completion: { (user, error) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(user)
-                    observer.onCompleted()
-                }
-            })
-            
-            return NopDisposable.instance
-        }
-    }
-    
-    /** 
-        sign in anonymously
-    */
-    func rx_signInAnonymously() -> Observable<FIRUser?> {
-        return Observable.create { observer in
-            self.signInAnonymouslyWithCompletion({ (user, error) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(user)
-                    observer.onCompleted()
-                }
-            })
-            
-            return NopDisposable.instance
-        }
-    }
-    
-    /**
-     Sign in with credential.
-     @param credentials An instance of FIRAuthCredential (Facebook, Twitter, Github, Google)
-    */
-    func rx_signInWithCredentials(credentials: FIRAuthCredential) -> Observable<FIRUser?> {
-        return Observable.create { observer in
-            FIRAuth.auth()?.signInWithCredential(credentials, completion: { (user, error) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(user)
-                    observer.onCompleted()
-                }
-            })
-            
-            return NopDisposable.instance
-        }
-    }
-    
-    /**
-     Sign in with custom token.
-     @param A custom token. Please see Firebase's documentation on how to set this up.
-    */
-    func rx_signInWithCustomToken(token: String) -> Observable<FIRUser?> {
-        return Observable.create { observer in
-            self.signInWithCustomToken(token, completion: { (user, error) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(user)
-                    observer.onCompleted()
-                }
-            })
-            
-            return NopDisposable.instance
-        }
-    }
-    
-    /**
-     Create and on success sign in a user with the given email address and password.
-     @param email The user's email address.
-     @param password The user's desired password
-    */
-    func rx_createUserWithEmail(email: String, password: String) -> Observable<FIRUser?> {
-        return Observable.create { observer in
-            self.createUserWithEmail(email, password: password, completion: { (user, error) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(user)
-                    observer.onCompleted()
-                }
-            })
-            
-            return NopDisposable.instance
-        }
-    }
-    
-}
diff --git a/RxFirebase/Classes/RxFirebaseDatabase.swift b/RxFirebase/Classes/RxFirebaseDatabase.swift
deleted file mode 100644
index 496b91a..0000000
--- a/RxFirebase/Classes/RxFirebaseDatabase.swift
+++ /dev/null
@@ -1,339 +0,0 @@
-//
-//  RxFirebaseDatabase.swift
-//  Pods
-//
-//  Created by David Wong on 19/05/2016.
-//
-//
-
-import FirebaseDatabase
-import RxSwift
-
-public extension FIRDatabaseQuery {
-    /**
-     Listen for data changes at a particular location.
-     This is the primary way to read data from the Firebase Database. The observers 
-     will be triggered for the initial data and again whenever the data changes.
-     
-     @param eventType The type of event to listen for.
-    */
-    func rx_observe(eventType: FIRDataEventType) -> Observable<FIRDataSnapshot> {
-        return Observable.create { observer in
-            let handle = self.observeEventType(eventType) { (snapshot) in
-                observer.onNext(snapshot)
-            }
-            return AnonymousDisposable {
-                self.removeObserverWithHandle(handle)
-            }
-        }
-    }
-    /**
-     Listen for data changes at a particular location. This is the primary way to read data from
-     the Firebase Database. The observers will be triggered for the initial data and again 
-     whenever the data changes. In addition, for FIRDataEventTypeChildAdded,FIRDataEventTypeChildMoved 
-     and FIRDataEventTypeChildChanged, your block will be passed the key of the previous node by
-     priority order.
-     
-     @param eventType The type of event to listen for.
-    */
-    func rx_observeWithSiblingKey(eventType: FIRDataEventType) -> Observable<(FIRDataSnapshot, String?)> {
-        return Observable.create { observer in
-            let handle = self.observeEventType(eventType, andPreviousSiblingKeyWithBlock: { (snapshot, siblingKey) in
-                observer.onNext((snapshot, siblingKey))
-            })
-            return AnonymousDisposable {
-                self.removeObserverWithHandle(handle)
-            }
-        }
-    }
-    
-    /**
-     This is equivalent to rx_observe(), except the observer is immediately canceled after the initial data is returned.
-     
-     @param eventType The type of event to listen for.
-    */
-    func rx_observeSingleEventOfType(eventType: FIRDataEventType) -> Observable<FIRDataSnapshot> {
-        return Observable.create { observer in
-            self.observeSingleEventOfType(eventType, withBlock: { (snapshot) in
-                observer.onNext(snapshot)
-                observer.onCompleted()
-            })
-            
-            return NopDisposable.instance
-        }
-    }
-    
-    /**
-     This is equivalent to rx_observeWithSiblingKey(), except the observer is immediately 
-     canceled after the initial data is returned.
-     
-     @param eventType The type of event to listen for.
-    */
-    func rx_observeSingleEventOfTypeWithSiblingKey(eventType: FIRDataEventType) -> Observable<(FIRDataSnapshot, String?)> {
-        return Observable.create { observer in
-            self.observeSingleEventOfType(eventType, andPreviousSiblingKeyWithBlock: { (snapshot, string) in
-                observer.onNext((snapshot, string))
-                observer.onCompleted()
-            })
-            return NopDisposable.instance
-        }
-    }
-}
-
-public extension FIRDatabaseReference {
-    /**
-     Update changes the values at the specified paths in the dictionary without 
-     overwriting other keys at this location
-     
-     @param values A dictionary of keys to change and their new values
-    */
-    func rx_updateChildValues(values: [String : AnyObject]) -> Observable<FIRDatabaseReference> {
-        return Observable.create { observer in
-            self.updateChildValues(values, withCompletionBlock: { (error, databaseReference) in
-                if let error = error {
-                    observer.onError(error)
-                    return
-                } else {
-                    observer.onNext(databaseReference)
-                    observer.onCompleted()
-                }
-            })
-            
-            return NopDisposable.instance
-        }
-    }
-    
-    /**
-     Write data to this Firebase Database location.
-     
-     This will overwrite any data at this location and all child locations.
-     
-     Data types that can be set are:
-     
-     - String / NSString
-     - NSNumber
-     - Dictionary<String: AnyObject> / NSDictionary
-     - Array<Above objects> / NSArray
-     
-     The effect of the write will be visible immediately and the correspoding 
-     events will be triggered. Synchronization of the data to the Firebase Database 
-     servers will also be started.
-     
-     Passing null for the new value is equivalent to calling remove()
-     all data at this location or any child location will be deleted.
-     
-     Note that rx_setValue() will remove any priority stored at this location, 
-     so if priority is meant to be preserved, you should use setValue(value:, priority:) instead.
-     
-     @param value The value to be written
-     @param priority The Priority to be attached to the data.
-    */
-    func rx_setValue(value: AnyObject!, priority: AnyObject? = nil) -> Observable<FIRDatabaseReference> {
-        return Observable.create { observer in
-            self.setValue(value, andPriority: priority, withCompletionBlock: { (error, databaseReference) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(databaseReference)
-                    observer.onCompleted()
-                }
-            })
-            return NopDisposable.instance
-        }
-    }
-    
-    /**
-     Remove the data at this Firebase Database location. Any data at child locations will also be deleted.
-     
-     The effect of the delete will be visible immediately and the corresponding events
-     will be triggered. Synchronization of the delete to the Firebase Database servers will 
-     also be started.
-    */
-    func rx_removeValue() -> Observable<FIRDatabaseReference> {
-        return Observable.create { observer in
-            self.removeValueWithCompletionBlock({ (error, databaseReference) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(databaseReference)
-                    observer.onCompleted()
-                }
-            })
-            return NopDisposable.instance
-        }
-    }
-    /**
-     Performs an optimistic-concurrency transactional update to the data at this location. Your block will be called with a FIRMutableData
-     instance that contains the current data at this location. Your block should update this data to the value you
-     wish to write to this location, and then return an instance of FIRTransactionResult with the new data.
-     
-     If, when the operation reaches the server, it turns out that this client had stale data, your block will be run again with the latest data from the server.
-     
-     When your block is run, you may decide to aport the traansaction by return FIRTransactionResult.abort()
-     
-     @param block This block receives the current data at this location and must return an instance of FIRTransactionResult
-    */
-    func rx_runTransactionBlock(block: ((FIRMutableData!) -> FIRTransactionResult)!) -> Observable<(isCommitted: Bool, snapshot: FIRDataSnapshot?)> {
-        return Observable.create { observer in
-            self.runTransactionBlock(block, andCompletionBlock: { (error, isCommitted, snapshot) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext((isCommitted, snapshot))
-                    observer.onCompleted()
-                }
-            })
-            return NopDisposable.instance
-        }
-    }
-    
-    /**
-     Set a priority for the data at this Firebase Database location.
-     Priorities can be used to provide a custom ordering for the children at a location
-     (if no priorities are specified, the children are ordered by key).
-     
-     You cannot set a priority on an empty location. For this reason
-     setValue:andPriority: should be used when setting initial data with a specific priority
-     and setPriority: should be used when updating the priority of existing data.
-     
-     Children are sorted based on this priority using the following rules:
-     
-     Children with no priority come first.
-     Children with a number as their priority come next. They are sorted numerically by priority (small to large).
-     Children with a string as their priority come last. They are sorted lexicographically by priority.
-     Whenever two children have the same priority (including no priority), they are sorted by key. Numeric
-     keys come first (sorted numerically), followed by the remaining keys (sorted lexicographically).
-     
-     Note that priorities are parsed and ordered as IEEE 754 double-precision floating-point numbers.
-     Keys are always stored as strings and are treated as numbers only when they can be parsed as a
-     32-bit integer
-     
-     @param priority The priority to set at the specified location.
-     */
-    func rx_setPriority(priority : AnyObject) -> Observable<FIRDatabaseReference> {
-        return Observable.create { observer in
-            self.setPriority(priority, withCompletionBlock: { (error, databaseReference) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(databaseReference)
-                    observer.onCompleted()
-                }
-            })
-            return NopDisposable.instance
-        }
-    }
-    
-    /**
-     Ensure the data at this location is set to the specified value when
-     the client is disconnected (due to closing the browser, navigating
-     to a new page, or network issues).
-     
-     onDisconnectSetValue() is especially useful for implementing "presence" systems,
-     where a value should be changed or cleared when a user disconnects
-     so that he appears "offline" to other users.
-     
-     @param value The value to be set after the connection is lost.
-     @param priority The priority to be set after the connection is lost.
-    */
-    func rx_onDisconnectSetValue(value: AnyObject, priority: AnyObject? = nil) -> Observable<FIRDatabaseReference> {
-        return Observable.create { observer in
-            self.onDisconnectSetValue(value, andPriority: priority, withCompletionBlock: { (error, databaseReference) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(databaseReference)
-                    observer.onCompleted()
-                }
-            })
-            return NopDisposable.instance
-        }
-    }
-    
-    /**
-     Ensure the data has the specified child values updated when
-     the client is disconnected (due to closing the browser, navigating 
-     to a new page, or network issues).
-     
-     @param values A dictionary of child node keys and the values to set them to after the connection is lost.
-    */
-    func rx_onDisconnectUpdateChildValue(values: [String : AnyObject]) -> Observable<FIRDatabaseReference> {
-        return Observable.create { observer in
-            self.onDisconnectUpdateChildValues(values, withCompletionBlock: { (error, databaseReference) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(databaseReference)
-                    observer.onCompleted()
-                }
-            })
-            return NopDisposable.instance
-        }
-    }
-    /**
-     Ensure the data t this location is removed when
-     the client is disconnected (due to closing the app, navigating
-     to a new page, or network issues
-     
-     rx_onDisconnectRemoveValue() is especially useful for implementing "presence systems.
-    */
-    func rx_onDisconnectRemoveValue() -> Observable<FIRDatabaseReference> {
-        return Observable.create { observer in
-            self.onDisconnectRemoveValueWithCompletionBlock({ (error, databaseReference) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(databaseReference)
-                    observer.onCompleted()
-                }
-            })
-            return NopDisposable.instance
-        }
-    }
-}
-
-
-public extension ObservableType where E : FIRDataSnapshot {
-    
-    func rx_filterWhenNSNull() -> Observable<E> {
-        return self.filter { (snapshot) -> Bool in
-            return snapshot.value is NSNull
-        }
-    }
-    
-    func rx_filterWhenNotNSNull() -> Observable<E> {
-        return self.filter { (snapshot) -> Bool in
-            return !(snapshot.value is NSNull)
-        }
-    }
-    
-    func rx_children() -> Observable<FIRDataSnapshot> {
-        return self.flatMap({ (snapshot) -> Observable<FIRDataSnapshot> in
-            return Observable.create { observer in
-                
-                for snapChild in snapshot.children {
-                    if let snapChild = snapChild as? FIRDataSnapshot {
-                        observer.onNext(snapChild)
-                    }
-                }
-                observer.onCompleted()
-                
-                return NopDisposable.instance
-            }
-        })
-    }
-    
-    func rx_childrenAsArray() -> Observable<[FIRDataSnapshot]> {
-        return self.flatMap({ (snapshot) -> Observable<[FIRDataSnapshot]> in
-            return Observable.create { observer in
-                if let array = snapshot.children.allObjects as? [FIRDataSnapshot] {
-                    observer.onNext(array)
-                }
-                observer.onCompleted()
-                
-                return NopDisposable.instance
-            }
-        })
-    }
-    
-}
\ No newline at end of file
diff --git a/RxFirebase/Classes/RxFirebaseRemoteConfig.swift b/RxFirebase/Classes/RxFirebaseRemoteConfig.swift
deleted file mode 100644
index 70c8103..0000000
--- a/RxFirebase/Classes/RxFirebaseRemoteConfig.swift
+++ /dev/null
@@ -1,34 +0,0 @@
-//
-//  RxFirebaseRemoteConfig.swift
-//  Pods
-//
-//  Created by David Wong on 20/05/2016.
-//
-//
-
-import FirebaseRemoteConfig
-import RxSwift
-
-public extension FIRRemoteConfig {
-    /**
-     Fetches Remote Config data and sets a duration that specifies how long config data lasts.
-     
-     @param expirationDuration  Duration that defines how long fetched config data is available, in seconds. When the config data expires, a new fetch is required.
-     
-    */
-    func rx_fetchWithExpirationDuration(expirationDuration: NSTimeInterval) -> Observable<FIRRemoteConfig> {
-        return Observable.create { observer in
-            self.fetchWithExpirationDuration(expirationDuration) { (status, error) -> Void in
-                if (status == FIRRemoteConfigFetchStatus.Success) {
-                    self.activateFetched()
-                    observer.onNext(self)
-                    observer.onCompleted()
-                } else if let error = error{
-                    observer.onError(error)
-                }
-            }
-            
-            return NopDisposable.instance
-        }
-    }
-}
\ No newline at end of file
diff --git a/RxFirebase/Classes/RxFirebaseStorage.swift b/RxFirebase/Classes/RxFirebaseStorage.swift
deleted file mode 100644
index 2c3a09d..0000000
--- a/RxFirebase/Classes/RxFirebaseStorage.swift
+++ /dev/null
@@ -1,320 +0,0 @@
-//
-//  RxFirebaseStorage.swift
-//  Pods
-//
-//  Created by David Wong on 19/05/2016.
-//
-//
-
-import FirebaseStorage
-import RxSwift
-
-public extension FIRStorageReference {
-    // MARK: UPLOAD
-    
-    /**
-     Asynchronously uploads data to the currently specified FIRStorageReference.
-     This is not recommended for large files, and one should instead upload a file from disk.
-     
-     @param uploadData The NSData to upload.
-     @param metadata FIRStorageMetaData containing additional information (MIME type, etc.) about the object being uploaded.
-     
-    */
-    func rx_putData(data: NSData, metaData: FIRStorageMetadata? = nil) -> Observable<FIRStorageUploadTask> {
-        return Observable.create { observer in
-            observer.onNext(self.putData(data, metadata: metaData, completion: { (metadata, error) in }))
-            return NopDisposable.instance
-        }
-    }
-    
-    /**
-     Asynchronously upload data to the currently specified FIRStorageReference.
-     This is not recommended for large files, and one should instead upload a file from disk.
-     This method will output upload progress and success or failure states.
-     
-     @param uploadData The NSData to upload.
-     @param metadata FIRStorageMetaData containing additional information (MIME type, etc.) about the object being uploaded.
-    */
-    func rx_putDataWithProgress(data: NSData, metaData: FIRStorageMetadata? = nil) -> Observable<(FIRStorageTaskSnapshot, FIRStorageTaskStatus)> {
-        return rx_putData(data, metaData: metaData).rx_storageStatus()
-    }
-    
-    /**
-     Asynchronously uploads a file to the currently specified FIRStorageReference.
-     
-     @param fileURL A URL representing the system file path of the object to be uploaded.
-     @param metadata FIRStorageMetadata containing additional information (MIME type, etc.) about the object being uploaded.
-    */
-    func rx_putFile(path: NSURL, metadata: FIRStorageMetadata? = nil) -> Observable<FIRStorageUploadTask> {
-        return Observable.create { observer in
-            let uploadTask = self.putFile(path, metadata: metadata, completion: { (metadata, error) in })
-            observer.onNext(uploadTask)
-            return AnonymousDisposable {
-                uploadTask.cancel()
-            }
-        }
-    }
-    
-    /**
-     Asynchronously uploads a file to the currently specified FIRStorageReference.
-     This method will output upload progress and success or failure states.
-     
-     @param fileURL A URL representing the system file path of the object to be uploaded.
-     @param metadata FIRStorageMetadata containing additional information (MIME type, etc.) about the object being uploaded.
-     */
-    func rx_putFileWithProgress(path: NSURL, metaData: FIRStorageMetadata? = nil) -> Observable<(FIRStorageTaskSnapshot, FIRStorageTaskStatus)> {
-        return rx_putFile(path).rx_storageStatus()
-    }
-    
-    // MARK: DOWNLOAD
-    
-    /**
-     Asynchronously downloads the object at the FIRStorageReference to an NSData Object in memory.
-     An NSData of the provided max size will be allocated, so ensure that the device has enough free
-     memory to complete the download. For downloading large files, writeToFile may be a better option.
-     
-     @param size The maximum size in bytes to download.  If the download exceeds this size the task will be cancelled and an error will be returned.
-    */
-    func rx_dataWithMaxSize(size: Int64) -> Observable<NSData?> {
-        return Observable.create { observer in
-            let download = self.dataWithMaxSize(size, completion: { (data, error) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(data)
-                    observer.onCompleted()
-                }
-            })
-            return AnonymousDisposable {
-                download.cancel()
-            }
-        }
-    }
-    /**
-     Asynchronously downloads the object at the FIRStorageReference to an NSData Object in memory.
-     An NSData of the provided max size will be allocated, so ensure that the device has enough free
-     memory to complete the download. For downloading large files, writeToFile may be a better option.
-     
-     This method will output upload progress and success states.
-     
-     @param size The maximum size in bytes to download.  If the download exceeds this size the task will be cancelled and an error will be returned.
-     */
-    func rx_dataWithMaxSizeProgress(size: Int64) -> Observable<(NSData?, FIRStorageTaskSnapshot?, FIRStorageTaskStatus?)> {
-        return Observable.create { observer in
-            let download = self.dataWithMaxSize(size, completion: { (data, error) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext((data, nil, .Success))
-                    observer.onCompleted()
-                }
-            })
-            
-            download.observeStatus(.Progress, handler: { (snapshot: FIRStorageTaskSnapshot) in
-                if let error = snapshot.error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext((nil, snapshot, .Progress))
-                }
-            })
-            
-            return AnonymousDisposable {
-                download.cancel()
-            }
-        }
-    }
-    
-    /**
-     Asynchronously downloads the object at the current path to a specified system filepath.
-     
-     @param fileURL A file system URL representing the path the object should be downloaded to.
-    */
-    func rx_writeToFile(localURL: NSURL) -> Observable<NSURL?> {
-        return Observable.create { observer in
-            let download = self.writeToFile(localURL, completion: { (url, error) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(url)
-                    observer.onCompleted()
-                }
-            })
-            return AnonymousDisposable {
-                download.cancel()
-            }
-        }
-    }
-    
-    /**
-     Asynchronously downloads the object at the current path to a specified system filepath.
-     
-     This method will output upload progress and success states.
-     
-     @param fileURL A file system URL representing the path the object should be downloaded to.
-     */
-    func rx_writeToFileWithProgress(localURL: NSURL) -> Observable<(NSURL?, FIRStorageTaskSnapshot?, FIRStorageTaskStatus?)> {
-        return Observable.create { observer in
-            let download = self.writeToFile(localURL, completion: { (url, error) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext((url, nil, .Success))
-                    observer.onCompleted()
-                }
-            })
-            
-            download.observeStatus(.Progress, handler: { (snapshot: FIRStorageTaskSnapshot) in
-                if let error = snapshot.error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext((nil, snapshot, .Progress))
-                }
-            })
-            
-            return AnonymousDisposable {
-                download.cancel()
-            }
-        }
-    }
-    
-    /**
-     Asynchronously retrieves a long lived download URL with a revokable token.
-     This can be used to share the file with others, but can be revoked by a developer
-     in the Firebase Console if desired.
-    */
-    func rx_downloadURL() -> Observable<NSURL?> {
-        return Observable.create { observable in
-            self.downloadURLWithCompletion({ (url, error) in
-                if let error = error {
-                    observable.onError(error)
-                } else {
-                    observable.onNext(url)
-                    observable.onCompleted()
-                }
-            })
-            return NopDisposable.instance
-        }
-    }
-    
-    // MARK: DELETE
-    /**
-     Deletes the object at the current path.
-    */
-    func rx_delete() -> Observable<Void> {
-        return Observable.create { observable in
-            self.deleteWithCompletion({ error in
-                if let error = error {
-                    observable.onError(error)
-                } else {
-                    observable.onNext()
-                    observable.onCompleted()
-                }
-            })
-            return NopDisposable.instance
-        }
-    }
-    
-    // MARK: METADATA
-    /**
-     Retrieves metadata associated with an object at the current path.
-    */
-    func rx_metadata() -> Observable<FIRStorageMetadata?> {
-        return Observable.create { observer in
-            self.metadataWithCompletion({ (metadata, error) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(metadata)
-                    observer.onCompleted()
-                }
-            })
-            return NopDisposable.instance
-        }
-    }
-    
-    /**
-     Updates the metadata associated with an object at the current path.
-     
-     @param metadata An FIRStorageMetadata object with the metadata to update.
-    */
-    func rx_updateMetadata(metadata: FIRStorageMetadata) -> Observable<FIRStorageMetadata?> {
-        return Observable.create { observer in
-            self.updateMetadata(metadata, completion: { (metadata, error) in
-                if let error = error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext(metadata)
-                    observer.onCompleted()
-                }
-            })
-            return NopDisposable.instance
-        }
-    }
-    
-}
-
-extension FIRStorageUploadTask {
-    func rx_observeStatus(status: FIRStorageTaskStatus) -> Observable<(FIRStorageTaskSnapshot, FIRStorageTaskStatus)> {
-        return Observable.create { observer in
-            let observeStatus = self.observeStatus(status, handler: { (snapshot: FIRStorageTaskSnapshot) in
-                if let error = snapshot.error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext((snapshot, status))
-                    if status == .Success {
-                        observer.onCompleted()
-                    }
-                }
-            })
-            return AnonymousDisposable {
-                self.removeObserverWithHandle(observeStatus)
-            }
-        }
-    }
-}
-
-extension FIRStorageDownloadTask {
-    func rx_observeStatus(status: FIRStorageTaskStatus) -> Observable<(FIRStorageTaskSnapshot, FIRStorageTaskStatus)> {
-        return Observable.create { observer in
-            let observeStatus = self.observeStatus(status, handler: { snapshot in
-                if let error = snapshot.error {
-                    observer.onError(error)
-                } else {
-                    observer.onNext((snapshot, status))
-                    if status == .Success {
-                        observer.onCompleted()
-                    }
-                }
-            })
-            return AnonymousDisposable {
-                self.removeObserverWithHandle(observeStatus)
-            }
-        }
-    }
-}
-
-extension ObservableType where E : FIRStorageUploadTask {
-    func rx_storageStatus() -> Observable<(FIRStorageTaskSnapshot, FIRStorageTaskStatus)> {
-        return self.flatMap { (uploadTask: FIRStorageUploadTask) -> Observable<(FIRStorageTaskSnapshot, FIRStorageTaskStatus)> in
-            let progressStatus = uploadTask.rx_observeStatus(.Progress)
-            let successStatus = uploadTask.rx_observeStatus(.Success)
-            let failureStatus = uploadTask.rx_observeStatus(.Failure)
-            
-            let merged = Observable.of(progressStatus, successStatus, failureStatus).merge()
-            return merged
-        }
-    }
-}
-
-extension ObservableType where E : FIRStorageDownloadTask {
-    func rx_storageStatus() -> Observable<(FIRStorageTaskSnapshot, FIRStorageTaskStatus)> {
-        return self.flatMap { (downloadTask: FIRStorageDownloadTask) -> Observable<(FIRStorageTaskSnapshot, FIRStorageTaskStatus)> in
-            let progressStatus = downloadTask.rx_observeStatus(.Progress)
-            let successStatus = downloadTask.rx_observeStatus(.Success)
-            let failureStatus = downloadTask.rx_observeStatus(.Failure)
-            
-            let merged = Observable.of(progressStatus, successStatus, failureStatus).merge()
-            return merged
-        }
-    }
-}