Overgrowth alpha 45

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!

On the coding front, here are a few highlights from the source repository:

- Added rabbit model - Started on rigging editor - Couple of new cursors - Changed quit from escape to alt-f4 or command-q - Added time estimation and progress text to shadow calculation - Added backlighting effect for rabbit model - Bug fixes

A rabbit appears!

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