Before we were setting the default as the previous value each time. Here
we store each property in a separate field, allowing us to access them
without setting a default.
Packets will be discarded if the sending player is not currently
interacting with the appropriate computer. This ensures players cannot
control other people's computers.
This is enforced by checking if the current container is a "computer
container", and this container holds the correct computer.
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.
