More things that end up in ebin than just beams.
Convience to work on just this app.

make, make test for just the app.
Removed unneeded quotes.
Added meck as dep

Useful for testing.
Corrected formatting and removed commented code.

Also turned the test back on.
Inital creation of gen_entity behavior.
PreGenEvent calls the callback on a pre_gen_event.
Initial implementation of persistent storage.
Persist on callback state change.
Entity removal tests and implrementation.
Fixed a receive.
Able to recover an entity from cold storage.
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.