Embree v2.3.3

• BVH builders more robustly handle invalid input data (Intel Xeon processor family)
• Motion blur support for hair geometry (Xeon)
• Improved motion blur performance for triangle geometry (Xeon)
• Improved robust ray tracing mode (Xeon)
• Added rtcCommitThread API call for easier integration into existing tasking systems (Xeon and Intel Xeon Phi coprocessor)
• Added support for recording and replaying all rtcIntersect/rtcOccluded calls (Xeon and Xeon Phi)