Add a CubitFactory and convert all objects to use it. Biggest change is thr Pyramiinx which now uses a lattice of Octahedrons and Tetrahedrons, just like the Diamond.
Progress with the Diamond. Everything working except for the isSolved(): turns out the center cubits can end up rotated along the face by multitudes of 120 degrees.
Progress with the Diamond. Everything working, expect one thing: half of the faces are upside down, and computing offset doesn't work on those faces properly.
Rename some classes.