grafx - Extensible Java Graphics Package Code

In TetrisBoard not using outlineCoveredHolesOnClearedLayersEvents.

Fixing an HTML formatting/misspelling error in Javadoc, in WellColors.

Adding class TetrisConstantOverrides.

Adding class TetrisWellColors.

A first stab at override() in BlockoutConstants. Not tested.

In BlockoutConstants, changing each of the 'public final static' member
variables into a function, simply by putting '()' after the member name and
then adding a 'return' statement. This is an incremental step towards getting
BlockoutConstants to be more configurable. In particular I want to override
some of these for Tetris.

In SimpleGameLogic, adding a new member variable
'm_newBlockPositioningStrategy', and exposing its configurability through one
of the constructors, thereby making a reverse incompatible change. I didn't
want to introduce a third constructor. BlockoutConstants also now exposes
'newBlockPositioningStrategy'.

In SimpleGameLogic, in two different spots, changing local variable definition
'Position p' to be 'Position pos' because that way it's easier to find uses of
that field in the code.

Adding local member m_outlineCoveredHolesOnClearedLayersEvents to
LocalBlockoutBoard. Adding second constructor which allows configuration of
that parameter.

Making a little bit of progress on TetrisBoard. I don't know what kind of view
I will prefer, 2D, perspective projection, or orthographic projection.