------------------
Breaking changes:
- Discontinue Python 2.6 support.
[jensens]
Bug fixes:
- More Python 2 / 3 compatibility
[ale-rt, pbauer]
- Start making code flake8 compliant
[ale-rt]
- Tests are compliant with Products.GenericSetup >= 2.0
- Fix TypeErrors when comparing some viewlet-types in py3.
[pbauer]