glProgramParameteriARB

glProgramParameteri is part of GL_ARB_get_program_binary so it could be
NULL for < 4.1...
Added Token PROGRAM_POINT_SIZE (for GL_PROGRAM_POINT_SIZE) in rasterizer state and pass
invalidate only if necessary
Merge branch 'optix' : I realized too late I was in the optix branch for changes that were unrelated to optix...
Another part that should have been done in the master branch instead of Optix
Merge branch 'master' of https://github.com/tlorach/nvFX