Code doesn't scale well

[rfsjim]

Now running three rooms with current code, especially when building up a room and having many small creeps and many tasks to complete, the code does not scale very well. It is quite CPU intensive.

Whilst only a temporary issue, would be good to work on this.

I think that part of this will be resolved with having a creep controller routine that issues out the tasks, and using more of the memory instead of running find commands for the construction sites.