added volume() for box3f (not just box3fa) classes
removed PING
Merge branch 'devel' of https://github.com/embree/embree into devel
added BuildTask struct and support for breadth first build to bvh4hair_builder2
breadth first build working in bvh4hair_builder2
fixes in breadth first build
spatial splits working properly in bvh4hair_builder2
better BVHs for compressed unaligned nodes
cleanups
Merge branch 'master' into devel
Merge branch 'devel' of https://github.com/embree/embree into devel
parallelized bvh4hair_builder2