grafx - Extensible Java Graphics Package Code

Renaming heightMetric() to oldHeightMetric(). Want to preserve this code as
well as the comment because the comment had insights.

Adding overallHeightMetric().

Linear scaling of coveredHoleMetric() is extremely important. We want to
continue playing well even if we had the misfortune of already having some
holes in our pit.

Fixing heightMetric(). The rest of the metrics need the same sort of analysis,
after which a suitable linear combination of the metrics should be decided
upon.

Tidy up the code a little bit.

Fixing nook and cranny metric, using square. May even try cube of height
delta if this is not good enough.

Going over the code with a fine-toothed comb. Finished heightMetric() and
coveredHoleMetric(), next up is nookAndCrannyMetric(), which is the one that
really needs a lot of attention.

Tweaking EvalFunction some more.

Changing the axis of rotation direction for one of the axis, so that I could
follow instructions more readily.

Printing out those best metrics.