Bump listener thread pool back up to 4
Randomly move up or down in the AnnealingMutator
Added a tempering schedule
Add shortcuts for tempering schedule and annealing mutator
Fix bug in filterMode()

Can't remove items from a CopyOnWriteArrayList while iterating over it
Remove support for serial and parallel runs

Parallel runs should be implemented higher up. Serial runs can be implemented with endgame scenarios or higher up.
More reliably handle Ctrl-C interruptions