0.8.1

Fixes and enhancements

Still not fully functional, but the main functionality of the project works (Server/Client dlna/UPnP)

Highlighted changes:

- 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.
- Fix quoted keys for some headers
- Fix Inotify (now uses twisted's Inotify, but still not working due to a bug in source code)
- Fix all pep8/pylint errors