Listener backend overhaul, gamemode support in the Scenario 1 files. - Listeners are now all tied to a class with getter methods as a way to keep them centrally located and pass them between scenario states. - Listeners subclass a DefaultListener class that handles almost everything. Only a constructor and the events are required! - Tested live and it seems to work! - Added (untested) code to the scenario 1 states to handle everything game modes. That's a job done!