Make BaseRequestTestCase.get_view a classmethod

* Remove the need to wrap function-based views in staticmethod
Look up BaseRequestTestCase.view in class __dict__

* Workaround python 2 unbound methods
Remove staticmethod from IntegrationTest docstring
Merge pull request #25 from incuna/test-coverage

Add test coverage
Merge pull request #24 from incuna/fix-get_view

Make BaseRequestTestCase.get_view a classmethod
Merge branch 'master' into refactor-tests