[gameone] Add new extractor gameone

Currently only usable for downloading tv episodes residing under
http://www.gameone.de/tv/
[gameone] Added explanation for usage of http://cdn.riptide-mtvn.com/
[gameone] Added extraction of description and fixed failing tests
[gameone] Simplified extraction of description
[gameone] Added extraction of age_limit
[gameone] Added timestamp extraction
[tenplay] Add new extractor
[gameone] Fix indentation and removed unused constants
Added vimple.ru support
removed extra char in regexp
Verified with pep8 and pyflakes
[TeacherTube] add user + collection, removed classrooms
[vk] Add support for more URL formats (#3172)
[vk] Add support for mobile URLs
[ivi] Add support for embedded URLs
[vk] Better support for embeds
[generic] Add support for ivi.ru embedded player
[GooglePlus] fix video title extraction
Merge branch 'master' of github.com:rg3/youtube-dl
[teachertube:user] fix regex