More Xtension design work.
Removed GameModel concept.
Renamed Games to GameModule.
Removed TransitionModel concept.
Removed ScreenModel concept.
Renamed Screens.fs to Screen.fs.
More work on Xtensions.
Added Xtension to Screen and Game.
More work on dynamism.
More work on dynamism.
Got dynamism up and running.
Forgot to commit this change.