varying crease stitching issue fixed partally
stitching also working for varying edge crease weights
feature adaptive level guided termination almost working
feature adaptive level guided termination working
Enabled handling of non-quads.
Conversion of General1Ring to 1Ring is broken when trying to convert patch later to b-spline.
Creating GeneralSubdivPatch to SubddivPatch only when the general patch does only contain quads.
Merge branch 'devel' of https://github.com/embree/embree into devel