#100 Adds comments about game loop & update method and removes interface

frontend/core/src/com/gameware/game/GameWare.java

...end/core/src/com/gameware/game/models/ModelInterface.java

frontend/core/src/com/gameware/game/sprites/Sprite.java

...d/core/src/com/gameware/game/states/GameStateManager.java

frontend/core/src/com/gameware/game/states/State.java