Commits after:
2014-03-03 Draft PLBVH construction using binary radix tree.
f19f853685
Are merged into a single commit; this includes:
03-10 Remove single launch build AABB kernel.
03-10 Add kernels for setting PLBVH AABBs using distance from root.
03-10 Use faster morton code, remove convertChildNodeFormat kernel.
03-09 Add duplicate morton code handling to binary radix construct.
03-09 Remove slower PLBVH constructors.
03-08 Add binary radix tree construct using binary search.
03-06 Remove slowest PLBVH constructor, fix implicit construct AABB.
03-04 Test various optimizations for PLBVH binary radix tree construct.
-Use most significant bit instead of negative for internal nodes.
-Explicitly store root node index, so that it does not have to be 0.
-Check the root node first in PLBVH traversal.
-Fix rigid body clipping in RaytracedShadowDemo.
