- Banished color buffer updating at render time (except for gradient quads that uses vertex color)
- fully transparent quads are not rendered anymore (that avoid rendering transparent layers allowing complex layout for free).
git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9232 75d07b2b-3a1a-0410-a2c5-0572b91ccdca