Add a 'withdraw move' button to the Solving UI state.
Each object size now has its own number of levels (not always 18!)
Reorganize UI of the Play state.
Progress implementing RubikCube.retObjectString()
Progress making the Solver state more abstract.
Make the Solver state more abstract.
Formatting: remove tabs.
Progress with the 3x3x3 Solver.
Hopefully the only thing that remains to be done is to implement the RubikStateSolver.retCubeString().
More support for the 3x3x3 Solver: more of the actual 3x3x3 solver mechanism.