BerryBots demo

I wouldn't totally jump ship just yet. :-) No, there's no max speed, but you lose some speed when you bounce off walls. On sample.massivebattle.lua some of the bots can get up to pretty high speeds. I originally thought I'd have wall damage to kind of keep you from just bouncing all around, but when it came time to add it I wondered if it really needed it. As it turns out, you could pretty easily add wall or ram damage in via the stage code, too.