grafx - Extensible Java Graphics Package Code

Laying the groundwork for block inversion support, with nice animations of
that. To do this, m_currRot had to be tweaked to declare it as
AttemptedBlockMovementEvent instead of the prior AttemptedBlockRotationEvent,
which is a more general case, and so inversions can be stuffed into that
parameter as well. We're sort of going to treat inversions as rotations.

Defining m_currRotSpiegelUnits.

Introducing m_blockRotationPreAnim which paves the way for inversion animation.
Also introduced isEvtType() which makes the bitwise '&' operations clearer.

Joining a couple of code elements to make them sit on one line.

Joining a few code elements on one line, making easier to read.

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.