grafx - Extensible Java Graphics Package Code

Decrease epsilon to 0.001.

Decreasing qSearchBreadth to 32, increasing level 22 clear layers to 13.

Specifying the new required 'epsilon' field in ComputerPlayer constructor.

Doing some work on choosing a random move that is the best within epsilon.

Increasing the qSearchBreadth from 16 to 48. It needs to consider bad moves in
order to decide on effective slide moves.

Preferring the moves that don't have a slide element, all else being equal.

Defining a positionToScore HashMap which will prevent excessive eval()
computations.

Well the sliding has been implemented but I need to optimize.

Splitting dropBlockIntoWell() into two calls, in particular now there is one
which accepts a zStart value.

Replacing the original all-in-one combineWellWithBlock() with two calls, a
slightly modified, non-mutating combineWellWithBlock() and the new
dropBlockIntoWell(). These changes are so that the block sliding after drop is
easier to implement.