1 wor to go!

The Exxwor, the wor that appears at THE WAREHOUSE stage, has been added, so now only one wor remains to be done!
Additionally, this build comes with a major bugfix and other nice improvements.

CHANGELOG

• Added (new) Exxwor (the wor specific to THE WAREHOUSE stage).
• Made score restart from 0 when a game is resumed.
• Added 32nd (and last) color.
• Touched up some graphics.
• Changed (again) background of arenas title screen.
• Fixed major bug that made the software-based 5x scaler crash (a whole line of code had disappeared by accident).
• Updated/extended manual.