add support for download YouTube 3d format of 3d content
Merge pull request #1163 from xanadu/master

add support for download YouTube 3d format of 3d content
[youtube] show which formats are in 3D with "-F" and in the format field
[youtube]: new algo for length 83 (fixes #1164)
release 2013.08.02
[youtube] don't crash in verbose mode if 'ad3_module' is not defined in age protected videos (fixes #1159)
Add an extractor for Ooyala (closes #833)

Only works for some sites, it doesn't work for videos that use a f4m manifest
[myvideo] add support for videos that place the video info inside www.myvideo.de/service/data/video/{id}/config (fixes #616)
[arte] Prefer vídeos without subtitles in the same language (fixes #1173) and fix crash when there's no description
[arte] add support for downloading from http://liveweb.arte.tv (fixes #1014)
Add an extractor for videofy.me (closes #1171)

Also modify find_xpath_attr to accept values with spaces like for id="HQ on"
Add an extractor from muzu.tv (closes #1177)
[collegehumor] support urls in the format www.collegehumor.com/e/{video_id} (fixes #1179)