fixes in feature adaptive subdivision
stitching works together with feature adaptive subdivision
discrete tessellation pattern works
updates
uv coordinates working with quadquad4x4
holes working for quadquad4x4
bugfix
Merge branch 'devel' of https://github.com/embree/embree into devel
first sorting based half edge structure construction working
Merge branch 'devel' of https://github.com/embree/embree into devel