grafx - Extensible Java Graphics Package Code

Adding another example of the computation for max column in covered hole.

Breaking out the baseBlockSource.

Trying the added weight for corners and edges, in covered hole metric. Need to
do more testing.

Adjusting metric weights slightly and adding function sqrtEdgesCornersWeight().

Adding launch-computer-player-test.sh.

Adding ComputerPlayerLevelAction, ComputerPlayerTest, and
LaunchComputerPlayerTest.

Reverting SinglePlayerLevelAction to being a human game.

Reverting level 23 to having standard two second system drop timer.

Tidying up the EvalFunction metrics.

Slowing down the animation a little bit. This is mostly for the computer
player, to make the play look simpler.