added new versions of python and django

.travis.yml

@@ -3,10 +3,13 @@ python:
   - 2.7
   - 3.4
   - 3.5
+  - 3.6
 env:
   - DJANGO="django>=1.7,<1.8"
   - DJANGO="django>=1.8,<1.9"
   - DJANGO="django>=1.9,<1.10"
+  - DJANGO="django>=1.10,<1.11"
+  - DJANGO="django>=1.11,<1.12"
 matrix:
   exclude:
     - python: 3.5