Update SNOW so "(step)" matches up with in-game.
Update TrapDoor to match Minecraft 1.4.2 (issue #23)

This updates both data2str() and the Scroll tool.
Protect new blocks with Tile Entities (issue #23)

Also prevent copying and overwriting CommandBlocks by default.
Add Cobblestone Wall from Minecraft 1.4.2 (#23)

Modified data2Str(), Scroll tool, and keepData.
Added Flower Pot from Minecraft 1.4.2 (#23)

Modified data2Str(), Scroll tool, and Dupe tool.
Add Carrots & Potatoes from Minecraft 1.4.2 (#23)

Modified data2Str(), Scroll tool, and dupe.replace
Add Wood Button from Minecraft 1.4.2 (issue #23)

Modified data2Str() and Scroll tool.
Add Skull from Minecraft 1.4.2 (issue #23)

Modified data2Str(), Scroll tool and Dupe tool.

The rotation when skulls are on the ground is controlled by a tile
 entity, which is currently not being controlled by ToolBelt.
Add Anvil from Minecraft 1.4.2 (issue #23)

Modified data2Str() and Scroll tool.