BerryBots pre-release testing help

Haha, well, real packaging on Linux was already a to-do, but having actual people show some interest has a way of helping prioritize things. :-) And I can pay my Apple tax (er, developer license) to get rid of a scary warning there, maybe write an installer for Windows too, and I've got a nice "easier to build or install / run" story for the next version.

I've tested the .zip on a fresh install of Ubuntu, so I don't think there's anything major that I'm unknowingly depending on. I think I tried the Debian binary on a fresh install too.