bugfix in uv coordinates of quads
bugfix in subpatch visualization
enabled feature_adaptive_gregory
bugfix in fast quad mode switch of feature_adaptive_gregory
enabled feature_adaptive_bspline
enabled hard depth limit in feature_adaptive_bspline
enabling hard subdivision limit in feature_adaptive_gregory
enabling feature_adaptive_bspline
Merge branch 'devel' of https://github.com/embree/embree into devel