Remove v_glslgamma cvar (now assumed to be 1) and corresponding code like R_DrawGamma.

Remove v_glslgamma cvar (now assumed to be 1) and corresponding code like R_DrawGamma.

RENDERPATH_GL1* paths no longer support bloom.

Fix a bug in D3D9 renderpath where SHADERPERMUTATION_GAMMARAMPS would crash due to using the wrong variable for the texture unit.

Enable GL_ARB_texture_non_power_of_two on OSX again - the old OSX versions and corresponding hardware that had issues are long gone.

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@12381 d7cf8633-e32d-0410-b094-e92efae38249
::stable-branch::merge=477b95bb0bd3ee638ceefd2fc3251a43ff4212d0