better version reports (always mention build number)

better version reports (always mention build number)
minor cleanup of qpic system (loading and drawing)
minor improvement to lighting engine tweakability (LIGHTSCALE2)
minor cleanup to texture tracking (totaltexels now called texeldatasize)
r_texturestats texture size reports are now correct (was showing 4x what it should have)
r_texturestats report rearranged to put size on the left for easy sorting in console logs
cruft removal

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@145 d7cf8633-e32d-0410-b094-e92efae38249