Main integration -- first working simengine!

This pull request contains the very first runnable simulation engine. The program, which builds to cpp/sim_engine/bin/simengine, starts, runs for a configurable time or until manually stopped, accepts bot control program connections via TCP/IP, spawns and adds Mark 1 bots to the simulation on request, and stores the simulation results to a file. Configuration parameters are read from a file and can be overridden on the command line as needed.

It's a long way from our final goals.. but it runs and it works. Let the gaming begin!!