Magic Cube

Move 1) bandaged 3x3 2) normals cubes 3) octahedrons 4) both dinos to the new cubit creation scheme.

Important step towards making the implementation of an individual puzzle code-free (i.e. data-only): move the 'MeshBase[] mMeshes' variable from the individual classes to the parent TwistyObject.

Make the Kilominx cubit creation a bit more standard.

Introduce ObjectShape - a class encapsulating a shape of a Cubit.
Make the Megaminx cubit creation a bit more standard.

Minor.

COnvert the last object, the Rex cube, to the new cubit creation scheme. Provide the new Rex mesh.

New Ivy mesh.

Convert the Ivy corner cubit to the new, 'universal' cubit creation method.

This forces deep changes to 'createRoundSolid' and the underlying 'MeshPolygon' class to make them support arbitrary Polygon 'centers of face convexity'.

Reason: the faces of this cubit are concave and such default 'center of face convexity' (which by default used to be (0,0)) turned to lie outside the face - which produces strange visual artifacts.

Corrections for the Bandaged cubit creation.

Convert bandaged Cubes to the standard mesh creation code.