Magic Cube

Each object size now has its own number of levels (not always 18!)

Reorganize UI of the Play state.

The 3x3x3 Solver finished - here the last piece of work, locking the centers of the 3x3x3 cube in place so that RubikStateSolver's color picker cannot change them ( the CUBE3 solver assumes this )

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.

Progress making the Solver state more abstract.

Progress making the Solver state more abstract.

Make the Solver state more abstract.

Formatting: remove tabs.