Support rates > 2x (really 4x)

Also removed dependency on Microsoft.DirectX.AudioVideoPlayback.dll. May
need to add it back later, but I doubt it.
Merge pull request #133 from babgvant/master

Support rates > 2x (really 4x)
Merge remote-tracking branch 'upstream/master'
#127, #100 - Create "disc launcher" app - part last
- Support disc launcher app
- Support placeholder files (move.disc) on server