TwistyPuzzleLib

correction.

remove numLayers from 4 API methods.

Clean up TwistyObjectWithMesh's API (remove getDist3D() and getSize() )

Make calculation of circumscribed radius work for any current and future object.

Cleanup

Cleanup

bugfix (move iconode to TwistyObjectWithMesh as mesh creation sometimes depends on the mode)

port fixes from master

Carve out another, 2nd layer from TwistyObject: everything related to creating its Mesh.

Minor