[x2495iiii]

Well, I changed some more stuff, though it's still not finished. Not sure what jedi means by "tred is really really weird" since the treads look and turn pretty normally to me.

Whatevs.

Added a crosshair and a calibration method activated by pressing 0. Also added another tank and some more interesting stuff that happens when you blow up the tanks. Fixed some bugs, found some other bugs, and I'm working on a basic means of collision detection for enemies on enemies.