Proactively renaming RageDisplay::PixelFormat to RageDisplay::RagePixelFormat to resolve naming conflict with newer versionf of FFMpeg. Resolving problem with RageSoundResampler that was causing build failures on 64-bit machines.
Merge pull request #29 from quad-/master

Proactively renaming RageDisplay::PixelFormat to RageDisplay::RagePixelF...