Refactored GameLoop logic into SynchronousGameLoop.  Added Scene class for managing individual scenes.  Added Lerp math class with a method for performing frame rate independent velocity interpolation.  Added the Drawable interface for drawable objects, BamfObject now inherits Updateable and Drawable.  Added a CoreModule class for our core logic (Empty class for now).  Updated the SpriteStream with functionality to enforce draw order.  While this is slower (but optional), it should be fine for our usage.
Updating Xcode project