Update tests for django 2.0

[haakenlid]

#49

[coveralls]

Coverage remained the same at 100.0% when pulling e37f119 on haakenlid:master into 1a6ea28 on miki725:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 78b78c3 on haakenlid:master into 1a6ea28 on miki725:master.

[haakenlid]

The current test suite running on Travis does not use tox for some reason!

So without changing the MakeFile and/or the travis config, we are not running tests for all supported versions of django/python.

[coveralls]

Coverage decreased (-0.3%) to 99.745% when pulling 712ef29 on haakenlid:master into 1a6ea28 on miki725:master.

[ryan-copperleaf]

There’s a lot of unnecessary reformatting in this. Could it be kept to just essential fixes?

[haakenlid]

There’s a lot of unnecessary reformatting in this. Could it be kept to just essential fixes?

I understand what you are saying, but I'm not going to spend time on that. If you don't want to merge, just close the pull request.