Added Assets class that specifies paths for assets that were aded into game content pipeline.
Added Text class for utility functions like WrapText.
Moved Menu class into Core package.
Renamed and moved EscapeGame class into Gameplay package.
Using new EscapeGame class.
Defined common interface for basic display objects.
Added InputManager class that extracts input control from main game class.
Changed main game components to act as a game services.
Updated scene classes to use services.