Improvements
- Use [Tox](https://tox.wiki) to run tests
- Use Codecov to check to coverage before merging
- Django: drop 1.9 support, add 1.11 (LTS) support
- Python: tests against 2.7, 3.4, 3.5 and 3.6 versions
- Add `python-dateutil` to requirements
Fixes
- Support models with UUID primary keys ([111](https://github.com/jazzband/django-auditlog/pull/111))
- Add management commands package to setup.py ([130](https://github.com/jazzband/django-auditlog/pull/130))
- Add `changes_display_dict` property to `LogEntry` model to display diff in a more human readable format ([94](https://github.com/jazzband/django-auditlog/pull/94))