- Drop support for Python 2.7, 3.3, 3.4 as we no longer support these versions internally and nothing should be using them
- Drop support for Tornado < 4.2 since this is also out of date
- Add support for Tornado 5.1 and async with ``AsyncIOHandlerMixin``
- Update tests to include tests for the new ``AsyncIOHandlerMixin``
- Clean up code style a bit to make namespaces a bit more clear
- Cleaup setup.py a minor bit and have it ignore ‘-r’ includes in requirements
- Update PINs for requirements
- Update LICENSE copyright dates