Adding maxVerticesPerFace() to MeshPrimitive and optimizing a bit by iterating once over the vertexId and the verticesPerFace arrays.
Using maxVerticesPerFace() in TriangulateOp.
Adding minVerticesPerFace as well.
Added ieMeshInterpolation support for Houdini.

ToHoudiniPolygonsConverter will create a primitive attribute named "ieMeshInterpolation" and set it according to the MeshPrimitive::interpolation. "catmullClark" maps to "subdiv" and "linear" maps to "poly". FromHoudiniPolygonsConverter will detect the "ieMeshInterpolation" attribute and set the interpolation accordingly. The attribute name and values match IECoreMaya functionality.
Merge pull request #4 from ldmoser/maxVerticesPerFace

Max vertices per face
Merge pull request #8 from andrewkaufman/houdiniMeshType

Added ieMeshInterpolation support for Houdini.