Merge pull request #12 from ccnmtl/django-1.11

test on django 1.11

Author: sdreher

.travis.yml

@@ -7,6 +7,7 @@ env:
   - DJANGO="Django>=1.8.0,<1.9.0"
   - DJANGO="Django>=1.9.0,<1.10.0"
   - DJANGO="Django>=1.10,<1.11.0"
+  - DJANGO="Django>=1.11,<1.12.0"
 install:
   - pip install .
   - pip install flake8