Add flake8 checking to tests
Merge pull request #76 from incuna/flake8

Add flake8 and flake8-import-order to tests
Fix flake8 errors
Add timezone support

* Use `django.utils.timezone.now` instead of `datetime.datetime.now`
Fix import order for django < 1.7
Merge pull request #90 from incuna/timezones

Add timezone support
Bump to v3.5.1; Update Changelog
Add mkdocs and run mkdocs new
Split up roughly docs
Update README.md
Add make command to run docs locally