Direct screenwavemedia.com URLs support (issue #3766)

The first patch adds support for direct downloading from screenwavemedia.com URLs (by modifying the cinemassacre extractor). The second adds teamfourstar.com support on top of it.

**Warning**: the patches were not tested very well, and probably should not be accepted without review; I feel the code is quite inefficient with its multiple URL parsing and may not cover some corner cases.
Picked at random.
* http://teamfourstar.com/video/a-moment-with-tfs-episode-4/
* http://teamfourstar.com/video/league-taka-chogath-challenges/
* http://teamfourstar.com/video/dbcember-iconic-moments-dragonball-19/

Nothing special, really. I suppose I could have also added support for these types of URLs as playlists:
* http://teamfourstar.com/category/behind-the-scenes/
* http://teamfourstar.com/series/little-kuriboh-lets-plays/
* http://teamfourstar.com/littlekuriboh/ (?)

But because I never actually use the playlist downloading feature, I didn't bother.