bugfix in morton and fast builder, ray mask was not set for triangle1
fixed in tree rotation
cleanups in tree rotations
removed dead code from bvh4mb
bugfix in BVH4MB::clear, was not setting root to empty node
added large leaf fallback for BVH4MB builder
extracted global state in toplevel builder
removed unused animation mode from tutorial03
some cleanups and little optimization in bvh4i_intersector1
enabling triangle8 for single ray mode