Surface Subdivision Schemes for Python

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There exist two very powerful geometric surface subdivision schemes that do not yet exist for python users: Catmul-Clark subdivision surfaces, and Nira Dyn's Butterfly subdivision surface scheme. These schemes are useful in creating C2-continuous (under ideal conditions) surfaces from a control mesh of points. The later scheme interpolates the control mesh points, which makes it useful for scientific applications.,We plan on providing some background on the schemes detailing usecases and visualizing the res