Rethink endTurn(); yield();

[chrisdembia]

Instead of having takeOneTurn(); endTurn(); yield() in the run() method, maybe we actually want:

takeOneTurn(); myYield()

where myYield() does a few things just before we actually yield(). For example, it could update an indicator string to the amount of bytecode used in that turn. The reason is that we might want to use myYield() in many more places than just in run().

[chrisdembia]

Fixed by d5a73d3

[chrisdembia]

The GUI already shows us how much bytecode is used in a turn.