Update travis to run on 3.5.x and on 3.6.x nightly release

Author: Grokzen

.travis.yml

@@ -4,7 +4,8 @@ python:
   - "2.7"
   - "3.3"
   - "3.4"
-  - "3.5-dev"
+  - "3.5"
+  - "nightly"
 
 install: 
   - pip install -r dev-requirements.txt
@@ -16,3 +17,7 @@ script:
 after_success:
   - coverage combine
   - coveralls
+
+matrix:
+  allow_failures:
+    - python: "nightly"

ReleaseNotes.rst

@@ -13,6 +13,7 @@ Next Release
 - Fix bug when validating sequence and value should only be unicode escaped when a string
 - Improve validation of timestamps.
 - Improve float validation to now accept strings that is valid ints that uses scientific notation, "1e-06" for example.
+- Update travis to test against python 3.6
 
 
 1.5.0