Update Django and python version support.

Author: mjtamlyn

.travis.yml

@@ -1,12 +1,11 @@
 language: python
 python:
   - "2.7"
-  - "3.3"
   - "3.4"
+  - "3.5"
 env:
-  - DJANGO='django>=1.6,<1.7'
-  - DJANGO='django>=1.7,<1.8'
   - DJANGO='django>=1.8,<1.9'
+  - DJANGO='django>=1.9,<1.10'
   - DJANGO='--pre django'
 matrix:
   allow_failures: