Removing System.out.println() statements.
Adding some pictorials for rotations.
Starting to make comments that better explain the rotations.
Starting work on getNBestMoves(). Ideas on how to organize code at this point.
Clearing full layers before considering eval() function.
Trying to improve run_clearLayer(), to use new tech in MutableLayer etc.
Defining MutableLayer.makeLayerEmpty() and WellStorage.clearTopmostFullLayer().
First stab at a complete evalWithNextBlock().
Making WellStorage final. Defining copyInto() and makeEmptyWell() here.
Making MutableLayer final class.
