TwistyPuzzleLib

Actually use the TwistyCutSolid class. Many objects now finally have well-formed internal walls.

implement the 'roundness of external face does not depend on its size' thing in the BandagedCreators.

very important bugfix in FactoryCubit.createRoundedSolid: now the roundness of the external face and its max height is independent of the size of the cubie.

fix face shapes in TwistyCutSolid.

fix rounding corners in TwistyCutSolid.

minor

fix for computing outer faces when unifying cubits created by TwistyCutSolid

progress with unification of cubits created by FacotyCutSolid

progress with unification of cubits created by FacotyCutSolid

progress with FactoryCutSolid