optimizations
SmallNode struct now in SOA layout
using AVX in ray/4node intersection in SmallNode4
using intersector precalculations in subdivpatchdispl1_intersector1.h
first attempt to use AVX and SOA layout in quadquad intersector
Merge branch 'devel' of https://github.com/embree/embree into devel
Merge branch 'devel' of https://github.com/embree/embree into devel
updated readme
Merge branch 'v2.3.3' into devel
Merge branch 'devel' of https://github.com/embree/embree into devel