Bugfixes

Finally got some work done. The weird pausing issues are no longer; along with that, a minor interface weirdness—being able to hit "MENU" and get (apparently) the same result as "new game"—has been banished as well. Thanks to laurens.vets for reporting another bug, one I hadn't been aware of: rotating a piece off the bottom of the screen caused a crash. Shame on me for not checking array bounds, and so on. Both issues fixed now; if you'd like the shiny (or at least less be-bugged) new version, feel free to check it out from the SVN and compile it y'self. Now that I've got those out of the way, I'll be starting on the save-game system.