Each object size now has its own number of levels (not always 18!)
Progress with the Solver - RubikCube.retObjectString() finished.
What remains to be done here: ban changing colors of the centers of 3x3x3 faces, this shouldn't be allowed!
Progress implementing RubikCube.retObjectString()
Progress making the Solver state more abstract.
Make the Solver state more abstract.
Progress with the 3x3x3 Solver.
More support for the 3x3x3 Solver: more of the actual 3x3x3 solver mechanism.