Added TexCoord to BasicEffect shaders
Removed default BlendState for BasicEffect pass
Renamed reserved word Texture effect parameter in BasicEffect
Look for EXACT vertex buffer match (vertex and index array sizes must match request)
THIS BREAKS XNA COMPATIBILITY!
Modern (Sandybridge +) Intel Integrated Graphics chipsets have
a fast clear/blit unit ('blorp') which, at least under Mesa,
can only do fast color clears if all of the channels are being cleared
to either full (1.0 or 255) or empty (0). The default XNA discard
colour, CornflowerBlue, does not have this property. This patch
changes the discard colour to black (0,0,0,255) as this is the colour
likely to be best supported by hardware.
This patch gets rid of a per-clear warning on Intel Ivybride/Mesa 10.0 git