FE/Qt: no comments for shaders (might induce problems) -- instead use a separate COPYRIGHT file

FE/Qt: OSE headers for shaders

2d accel: 1. performmance: avoid separate drawing of primary surface texture 2. profiling: fps counter 3. saved state restore fix 4. make vhwa command constants values match ddraw contstants 5. guest driver: set proper ddRVal in DdUnlock 6. guest driver: return proper value in DdDestroySurface