grafx - Extensible Java Graphics Package Code

Adding comment that explains m_currRotUnits and dRotUnits.

Fixing issue with m_pendingRot w.r.t. block inversions.

Updating BlockoutAudio to handle block inversions, which are treated
similarly to block rotations.

Adding class 'UniformScale3D'.

Adding block inversions to SimpleGameLogic. LocalBlockoutBoard will certainly
fail now if it encounters such an event.

Starting to add block inversions.

Implementing encoding and decoding of block inversion events, in theory.

Re-arranging constants in BlockoutBoardEvent, improving some Javadoc.

Adding three new classes: FailedBlockInversionEvent, BlockInversionEvent, and
AttemptedBlockInversionEvent.

In BlockoutBoardEvent, defining BLOCK_INVERSION and FAILED_BLOCK_INVERSION
constants. Reformatting indentations in constant definitions, for clarity.
Taking 'protected' access away from constructor, making it package visible.