GeometryGamesPortfolioController
GeometryGamesThumbnail
	get used only in apps like KaleidoPaint and 4D Draw
	that let the user create a portfolio of drawings.

GeometryGamesViewController
GeometryGamesViewiOS
	get used as the root view controller in single-controller apps
	like Starter Code and Torus Games, and also as a child view controller
	in portfolio-based apps like KaleidoPaint and 4D Draw.

GeometryGamesWebViewController
	may be used in all Geometry Games apps.
