changed gloss behavior, now darkens light intensity (to 25% of normal) instead of...

changed gloss behavior, now darkens light intensity (to 25% of normal) instead of assuming gloss texture is dim, this is consistent with tenebrae behavior, inconsistent with doom3 behavior (sigh...), this makes OgrO's model skins look a lot better
no longer spews 'refusing to create light' warnings when loading map light entities that actually aren't lights at all

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@2797 d7cf8633-e32d-0410-b094-e92efae38249