- Refactored FirstTimeForm to use an initalise() method, in order to be more testable
- Rewrote FTW tests to test initialise()
- Refactored TestMixin get_application() to setup_application() since it doesn't actually return an application object
- Refactored ListPreviewWidget to make it more testable
- Wrote tests for ListPreviewWidget
- Refactored FormattingTagsForm somewhat
- Updated FormattingTagsForm tests
Updated setup.py with some Python3 changes.