Fixed some cleanup.
Added ability to add supervised entities.
Added handling when gen_event is stopping.
Added verbose and cover to eunit opts.
Added a supervisor for use w/ entity event pids.
Able to get entities by manager from persistence.
Updated callbacks specs.
Added kill for the ol' kill 'n' wait.
Balancer implemented.
Very rough balancer.

Can't do recover on it's own, but it balances entities.