Merged changes from py-source-sdk-2013
Updated deferred/lightmap blend mode:
- Global light and point/volume lights are now rendered to separate render targets
- Lightmap and global deferred light are mixed (mainly for better shadows)
- Point/volume lights are added in on top of the result
- Reenabled deferred lights for muzzle flashes (should look good now)
- Fixed detail texture option disabled on phong shader when using the team color option