grafx - Extensible Java Graphics Package Code

First pass at sqrtCoveredHoleMetric(). Untested.

Expanding comment to include computation of worst score.

Fixing the comment explaining "falloff" in both directions.

Adding comment which explains the need for a falloff function when multiple
holes are present in a single layer, so that the creation of additional holes
in the same troubled layer is not judged equally as, say, the creation of holes
in a layer that does not yet suffer from the "covered hole syndrome".

Commented out the 7-er impossible level because it takes a lot of startup time.

Making well wireframe darker, reverting back to 6-er impossible level.

My computer AI is able to clear this level.

Upping the "q" by one.

Making the impossible level one unit wider. It was too hard.

Adding a really impossible level, but my computer program can barely handle it
still.