Fixed Black Textures
Added an additional access point to lower vent
Fixed missing brushes that were colliding with a blocklos

Bug Fixes: zfighting, backfaces, added some blocklos, made chairs have no collision, added clip, basic clippng pass started

-disabled B
-assorted visual fixes

*Iterate on lower bombsite /Bsite cover iteration
*fixed some ladder textures
*added some more point_spotlights
*a few detail models
*filled nodraw near long ramp
*trimmed clips on back balcony and skybridge per feedback
*make sure forkshaft floor is not 4 units thin
*remove weird vent from long shaft
*deathmatch
*a little new detail work
*dealt with a few model errors, still more to do.