grafx - Extensible Java Graphics Package Code

Adding a comment.

Adjusting translation of block after rotation if it causes the block to hit the
well walls; mimic SimpleGameLogic.

Changing over from using BlockGenerator.chooseRandomCompositeRotation(), to now
using BlockGenerator.getPreferredCanonicalRotation(). The computer player is
making very quick and accurate moves now. Looks dandy.

Now using BlockGenerator.chooseRandomCompositeRotation() for choosing a random
composite rotation from a list.

Adding some new public methods that are related to choosing a canonical
rotation.

Changing width of popup window to be more suitable.

Improved intro screen.

Modified copyright notice.

Adding data/super-tricky-computer.blo.

Copyright notices and class-level comments.