[vevo] Correct test value

The date is now interpreted as UTC for consistency.
[vesti] Fix _VALID_URL regex
[vgtrk] Rename vesti extractor
Don't set the global socket timeout

Use the timeout argument of the `OpenerDirector.open` method instead
Don't install the global url opener

All the code uses now the urlopen method of YoutubeDL
Playvid extractor
Merge remote-tracking branch 'jaimeMF/remove_global_opener'
Merge remote-tracking branch 'MikeCol/playvid_extract'
[playvid] Simplify (#2539)
[generic/funnyordie] Add support for funnyordie embeds (Fixes #2546)
release 2014.03.11
Add format to unified_strdate
[wdr] Add support for WDR sites (Closes #1367)
[vimeo] Now VimeoIE doesn't match urls of channels with a numeric id (fixes #2552)
release 2014.03.12
[collegehumor] Fix test
[collegehumor] Extract like count
[collegehumor] Fix one more test
[funnyordie] Correct JSON interpretation
[br] Allow '/' in URL, allow empty author + broadcastDate fields

* Allow URLs that have a 'subdirectory' before the actual program name, e.g.
  'xyz/xyz-episode-1'.
* The author and broadcastDate fields in the XML file may be empty.
* Add test case for the two problems above.