Merge pull request #936 from iemejia/master

Added option for vtt WebVTT subtitle format for Youtube
added an IE for wimp.com
Merge branch 'master' of github.com:rg3/youtube-dl
added test for wimp.com
removed trailing ',' and corrected the title in test
changed wimp.py according to the changes suggested by jaime
added b'' to my regex expression in order to solve the error on python 3
FileDownloader: fixed call to "report_error" of YoutubeDL

It was being called as "error"
added .decode('ascii')
Add CSpanIE (closes #312)
[vevo] remove unused import
[wimp] minor readability improvements (#940)
ComedycentralIE: Force conversion of the description to unicode (close #941)

When writing to a file it would fail.
Simplify FakeYDL
Add test for youtube signature algorithm
ArteTvIE: rewrite the extract process to support the new site (fixes #875)

The video can be downloaded with rtmp or http, but the best quality format seems to always use rtmp.
Deleted the old methods.
Merge branch 'master' of github.com:rg3/youtube-dl
Add a clean-room implementation for youtube signatures
Merge branch 'master' of github.com:rg3/youtube-dl
Added HotNewHipHop IE