Django<1.8 is not compatible with python 3.5

Note the deprecation of HTMLParserError in Python 3.5:
https://docs.python.org/3/whatsnew/3.5.html#changes-in-the-python-api

Author: Ryan P Kilby

.travis.yml

@@ -24,4 +24,12 @@ matrix:
       env: DJANGO="Django>=1.4,<1.5"
     - python: "3.4"
       env: DJANGO="Django>=1.4,<1.5"
+    - python: "3.5"
+      env: DJANGO="Django>=1.4,<1.5"
+    - python: "3.5"
+      env: DJANGO="Django>=1.5,<1.6"
+    - python: "3.5"
+      env: DJANGO="Django>=1.6,<1.7"
+    - python: "3.5"
+      env: DJANGO="Django>=1.7,<1.8"
   fast_finish: true