Content - ContentTypes ContentTypeResource and ContentUnitsCollections

I thought these three would share more code than they ended up sharing so I combined them. The next one looks more complex though, so decided to make this PR now.
On 12/18/2014 09:41 AM, Austin wrote:
> I think that the solution is to also place an |if __name__ ==
> "__main__":| that sets the environment until we use the Django test runner.

I think it will be less sloppy and easier if we just make run-tests
accept the same input that nosetests accepts for which tests to run and
pass it through.