- better BSP tree splitting (experimental, option -altsplit)
- also compare shaders when sorting surfaces (should give slightly more fps)
- misc_model spawnflag 32: set vertex alpha from vertex color (for terrain blending)
git-svn-id: svn://svn.icculus.org/netradiant/trunk@240 61c419a2-8eb2-4b30-bcec-8cead039b335