[bug973369] - Removed old-style players and dependencies on the Popcorn.player module

[bug973369] - Removed more unneeded lines related to popcorn.players

[bug973369] - Removed popcon.player dependencies

[bug973369] - Added back the popcorn.player dependency

[bug973369] - Re-added 'popcorn.player' dependencies
Merge pull request #467 from admix/bug973369

[bug973369] - Removed old-style players and dependencies on the Popcorn.player module