added subdiv5 example with tris, quads, and pentagons
extended subdivmesh with normals and texcoords and multiple index arrays
half edge structure created properly for faces with arbitrary number of vertices
first version of GeneralCatmullClark1Ring compiles
Merge branch 'devel' of https://github.com/embree/embree into devel
added init2 function, that initializes the ring on opposite order
Merge branch 'devel' of https://github.com/embree/embree into devel