Fixed water render in inventory
Improved lighting, fixed bugs

Increased how often light updates, fixed an issue with block updates
causing a spurt of light, fixed an issue with how waster was drawn in
the inventory, and changed the light level of block.light.
Merge pull request #12 from carterv/alternate-lighting-test

Improved lighting, fixed bugs
Merge remote-tracking branch 'origin/master' into particle-test