Cohen3

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General:
- Automate documentation building via travis
- Add more sphinx documentation
- Remove livestreamer as basic dependency
- Migrate from pygtk to gi.repository
- Migrate Gstreamer from version 0.10 to 1.0
- Enhance Travis with more tests
- Reformat according pep8 directives.

Fixes:
- Fix quoted keys for some headers
- Fix Inotify (now uses twisted's Inotify)
- Fix all pep8/pylint errors

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General:
- Rename project from Cohen to Cohen3
- Migrate source code to python version 3
- Twisted >= 18.7.0 is now required
- Louie-latest is now required (instead of Louie)

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General:
- Travis enhancements: make travis upload to pypi

Fixes:
- Hotfix for LazyContainer

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Fixes:
- Fix issue when Cohen fails to be discovered by xbox 360 dlna client
- Fix issue when using Lazy Container on Samsung AllShare on 2012 Samsung TV fails

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General:
- lots of refactoring
- removed lots of Coherence stuff
- moved to lxml instead of (c)ElementTree
- Twisted >= 14.0 is now required
- livestreamer is now required
- cleanups and fixes

Backends:
- twitch.tv backend added

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