Overgrowth alpha 39

Here is what is new in Overgrowth in this weekly alpha. If you are confused what a weekly alpha is, or even what Overgrowth is, please read our fancy FAQ. Basically, we are developing a massive video game from the ground up -- we are able to do this completely independently by accepting preorders for the game before it's done!

Aubrey has made a number of new art assets this week, which are included in this alpha. On the coding front, here are a few highlights from the source repository:

- Fixed rabbot coloring - Fixed mac quit hang - Subgroup selection back in - Better top down input and tool handling - Ctrl-alt-g creates groups with minimized bounding boxes; ctrl-g creates groups with axis aligned bounding boxes - Some tool tweaks - Bug fixes

Thanks as always for all the support! See you guys in IRC and the forums.