grafx - Extensible Java Graphics Package Code

Starting to implement new eval function which loads metric classes dynamically.

Adding AlwaysTenMetric.java.

Adding in the ALT_NO_CHILD_LEFT_BEHIND_METRIC.

Revert back to 7x5 pit on level twenty-three.

Changing level twenty-three from 7x5 to 6x5.

Changing location of code entry function and fixing an error, needed to clear
HashSet before every call (or after every call).

Embellishing comments in WellMetricUtils.

In CoveredHoleMetric, removing toUncoverHoleIsFilledCubeOnTopHelping() and all
comments therein.

One more little optimization plus a comment improvement in CoveredHoleMetric.

Defining m_holeCountsByLayer in CoveredHoleMetric. Saving that object as
member to avoid excessive instantiations.