Pop anti xray patch to top
Split out the configuration of engine modes 1 and 2 to eliminate the block lag seen when mining stone or wood and using engine mode 1.

Now we maintain a new list of blocks to replace with ores in engine mode 2, to ensure that we only update when players mine blocks that are potentially not an ore. We could perhaps even elimate this slight lag from mode 2 by reducing the need for calling update(x,y,z)