Make* -> Driver::Create. Having these floating in arch.h isn't

useful; if you create the class, you need the class definition to
free it, and anyone creating a class is probably going to use it,
too.

stepmania/src/arch/LoadingWindow/LoadingWindow.h

@@ -7,6 +7,8 @@ struct RageSurface;
 class LoadingWindow
 {
 public:
+	static LoadingWindow *Create();
+
 	virtual RString Init() { return RString(); }
 	virtual ~LoadingWindow() { }