Finished and tested the quad-tree spatial partition. I also spent some time writing some debugging tools for the quad tree so I can make sure it's putting objects in the correct cell.

I also added a new part type for the replicas, a connector. This is used to create location where effects or connections will occur. I added a connector to the Chicago so I had a location to fire the beam. Now I'm just completing the last part: The addition to the replica entity that lets me add effects so I can add the laser effect when the weapon fire command goes off.

Hopefully I'll have the laser in another day or two.

I also shifted the game commands to a queue so that I can replay games and it's a good step toward making the game networkable (although I'm not planning on doing that until at least version 2).