Added a second vect4f to tempvars so renamed the
first one to follow other conventions.  Seems like
Material is the only thing using it (and I think it
could get away with a vec3 really but no harm done).
Modified Camera.setClipPlane() to avoid garbage 
creation using tempvars.  Only a new matrix is 
created now and I think I can get rid of that, too.
Commented out a line in the OglesShaderRenderer (android) that was occasionally causing a crash on android.
This line was already commented in other renderers, and I have to admit I have no clue of what it does except crashing the app
Modified to keep its projectionMatrixOverride around
to avoid garbage creation in setClipPlane().
Merge branch 'master' into per_geometry_scissor