This may be useful when you want your tool to also provide additional
methods. For instance, a pickaxe could provide methods to check whether
it can break the block in front.
We now listen to neighborChanged instead of onNeighborChange. This means
computers correctly detect redstone updates.
However, this leads to issues when moving turtles, so we defer the block
update until the turtle has finished moving.
Updated the source code to the version shipped as the 1.80pr0 alpha
release. Also removed some unnecessary files from the LuaJ subfolder
which were bulking up the repository.
