Add an extractor for syfy.com

It uses theplatfrom.com, which has been updated to work with f4m manifests
Add a downloader for f4m manifests
[france2.fr:generation-quoi] Skip test

The videos seem to not be available outside France
[sohu] Skip test

Only available from China
Replace test for dailymotion users
Merge remote-tracking branch 'jaimeMF/f4m'

Conflicts:
	youtube_dl/extractor/__init__.py
Merge branch 'master' of github.com:rg3/youtube-dl
Fix f4m downloading on Python 2.6