grafx - Extensible Java Graphics Package Code

Removing excellent-7er-blocks.blo and mega-excellent-6er-blocks.blo.

Changing fixed-covered-hole-metric.blo.

Remove TODO.txt. It's pretty much done.

In LocalBlockoutBoard.java, adding nice little feature of rendering covered
holes (using phantom block technology) after clearing layers; the rendering of
covered holes stays for about half a second and then fades away in about half a
second.

Reorganize EvalFunction.newDefaultInstance() to make it easier to pass custom
metric weights.

Tinkering with metrics in EvalFunction a tad more.

Adding data/excellent-7er-blocks.blo.

Committing some more game files.

Backing off on the covered hole metric weight in EvalFunction by 0.10.

Adding data/excellent-covered-hole-fix.blo.