Added google for work documentation

Author: DenisCarriere

docs/providers/Google.rst

@@ -14,7 +14,7 @@ Basic Geocoding
 
 .. code-block:: python
 
-    >>> import geocoder # pip install geocoder
+    >>> import geocoder
     >>> g = geocoder.google('Mountain View, CA')
     >>> g.json
     ...
@@ -73,13 +73,18 @@ Parameters
 ~~~~~~~~~~
 
 - `location`: Your search location you want geocoded.
+- `key`: Your Google developers free key.
+- `language`: 2-letter code of preferred language of returned address elements.
+- `client`: Google for Work client ID. Use with client_secret. Cannot use with key parameter
+- `client_secret`: Google for Work client secret. Use with client.
 - `method`: (default=geocode) Use the following:
 
   - geocode
   - reverse
   - timezone
   - elevation
 
+
 References
 ~~~~~~~~~~
 

geocoder/__init__.py

@@ -28,7 +28,7 @@
 __title__ = 'geocoder'
 __author__ = 'Denis Carriere'
 __author_email__ = 'carriere.denis@gmail.com'
-__version__ = '1.5.1'
+__version__ = '1.5.2'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2013-2015 Denis Carriere'