grafx - Extensible Java Graphics Package Code

Making use of new technique to do gradual system drop block speedups.

Changing level 46 a little bit.

Making first strides at integrating system drop block speedups into
SimpleGameLogic.

Adding classes BlockDropSpedUpCallback and BlockDropSpeedupAlgorithm in package
net.blockout.

Removing class BlockDropIncrementalSpeedupCharacteristics.

Adding BlockDropIncrementalSpeedupCharacteristics.

Making progress on NightmareModeAction.

Adding boolean values to return values in SuspendResume.

Modifying HardcodedInputTranslator to potentially take a SuspendResume and act
upon it; however I realized that SuspendResume should probably have boolean
return values in suspend() and in resume(), instead of being void method calls,
in order that the input translator knows the outcome of the calls.

These classes now implement the SuspendResume interface.