Changes:

• added an option to customize flat levels. Basically these are IDs of layers starting from 127 (the bottom one). Note that fsr you don't see the bottommost blocks of the world.
• added sandstone
• added mossy stone
• added shattered stone
• added stone bricks
• added torches. They emit light of value 14, they can be only placed on solid blocks, and they have an animated texture.

This is probably the last Alpha release. I feel like we'll be starting beta soon.