Final code used for competition

Dumbed-down version, less likely to bugs. Simply spins around until it
finds an opponent, then goes forward. Ultrasonic sensor spins during the
initial 3 seconds.
Merge branch 'master' of git://github.com/Thrustbb/NXTRobotSumo
Refactored code properly into multiple files. The initial processing in the main file should be removed, but has not been done yet.