Experimental function: motion blur (--motion-blur argument). At this moment, it can be laggy (especially when jumping).
Breaking blocks is now FPS independant.
Improves and optimizes the spreading mutations.
Fixed cobblestone fence id.
Merge branch 'master' of git://github.com/Jimx-/Minecraft
Removes is_exposed caching.

That was leading to outdated caches and too many blocks were rendered because of this.
Merge branch 'master' of https://github.com/boskee/Minecraft
Fixes the default item selector to be the first, not the second.
snowblocks
Added new font in main menu for game name. (I thought about adding original Minecraft font, but we should use "open" fonts)
Merge branch 'master' of https://github.com/boskee/Minecraft

Conflicts:
	controllers.py
Small fix (sorry).
Fixed error.
Added blurry image background in main menu.
Buttons now use hand cursor
Fixed button labels rendering in main menu. Button label was in the same group as button image, so label was sometimes not visible (was under button image).
Saved saving error when exiting game from main menu.
Update TODO.md
Small fix of TODO.md
textures update, chest fixed, creative options