Removed Python3.5 + Django 1.7.11 from travis build targets (non-supported combination)

.travis.yml

@@ -1,14 +1,23 @@
 language: python
+
 python:
     - "2.7"
     - "3.4"
     - "3.5"
+
 env:
     - DJANGO=1.7.11
     - DJANGO=1.8.7
     - DJANGO=1.9
+
+matrix:
+    exclude:
+    - python: "3.5"  # django 1.7 does not support python 3.5
+      env: DJANGO=1.7.11
+
 install:
     - pip install argparse
     - pip install -q Django==$DJANGO
     - pip install -q -r requirements.txt
-script: python quicktest.py helpdesk
+
+script: python quicktest.py helpdesk