grafx - Extensible Java Graphics Package Code

Starting to add NextBlockListener to SynchronizedModeGamePlayback.
Will need to sift through stream, then rewind.

This doesn't expose the bug for some reason.
I think there are additional state variables that are corrupted.

Adding additional information for reproducing the error.

Adding error.png and error.txt which shows a stack trace and a gamestate that
caused a problem, with the current files in SVN.

On the easy nightmare level, changing pit size from 2x5 to 5x2 so that it
better fits the window. The perspective looks kind of weird now though.

Moving interface NextBlockListener from package net.blockout.production to
package net.blockout.

Rename PanicModeLevel to NightmareModeLevel.

More panic mode nightmare mode stuff.

Fixing a minor mistake where block 'R' was repeated twice, and 'RR' was
missing.

Removing extraneous whitespace from end of SynchronizedModeGameRecorder.