New brand identity for Cuberite.

[xoft]

I quite like it. I tried making a variant that wasn't exactly the grass block:

One thing that bothers me a bit from the engineering point of view is the notch. If it was a real-world gear, the notch would make a very weak point of failure. I think real-world gears would have the notch inverse - not a "cut out", but rather "stand out" Please excuse my poor freehand drawing skills: