|SOURCE|
[Common::Actions]
* Added action constant STATE_EXIT to indicate a state has finished
[Common::GameStateManager]
* Added GetRenderer and SetRenderer to allow the use of a ZED Renderer for game
  states
* Added SetInputBinder which will be used by the game state manager to
  associate input with actions
* Removed deleting the InputBinder in the destructor as that is not handled by
  this class
[Common::GameplayGameState]
* Bound the escape key to STATE_EXIT
* Render just sets the clear colour to green and renders that
[Common::Game]
* The key combination Ctrl+Escape will completely quit out the game
* GameStateManager is initialised and the GameplayGameState is registered with
  it
* The GameplayGameState is invoked and will run until the force quit key
  combination is struck