Travis update: Django 1.6 & 1.7 do not support Python 3.5

Author: Evan Borgstrom

.travis.yml

@@ -22,6 +22,12 @@ matrix:
     - python: 2.6
       env: DJANGO=Django==1.8
 
+    - python: 3.5
+      env: DJANGO=Django=1.6
+
+    - python: 3.5
+      env: DJANGO=Django=1.7
+
 install:
   - pip install -q -e .
   - pip install -q $DJANGO