Made SOUND:PlayMusicPart pass on the loop and applyRate args.
Merge branch 'master' of http://github.com/stepmania/stepmania into PlayMusicPart_loopable
Fixed misplaced comma in docs for PlayMusicPart.
Merge pull request #46 from kyzentun/PlayMusicPart_loopable

Made SOUND:PlayMusicPart pass on the loop and applyRate args.