simulator.js doesn't actually contain the simulator, but is really just
an implementation of battles in the RoomGame interface.
Renames:
`Simulator.Battle` -> `Rooms.RoomBattle`
`Simulator.BattlePlayer` -> `Rooms.RoomBattlePlayer`
`Simulator.SimulatorManager` -> `Rooms.SimulatorManager`
`Simulator.SimulatorProcess` -> `Rooms.SimulatorProcess`
`Simulator.create` -> no longer exists, use `new Rooms.RoomBattle(...)`
Before, an options object containing properties and values to be used
was how decorated instances of the class would be created. This meant
the constructor could assign anything you feel like to `this`. Rather
than that, the constructor now assigns a strict set of values, and
methods are redefined in subclasses.
Basic unit tests were added to test if they could be written for after
the final refactor to fix the other memory leak here.
