Move loaders into their own classes.

(These should have a common base class, but that can be done later;
I'm doing this to make it a bit more manageable so I can add the
new couples format to these.)

stepmania/src/NotesLoaderSM.h

@@ -0,0 +1,22 @@
+#ifndef NOTES_LOADER_SM_H
+#define NOTES_LOADER_SM_H
+
+#include "Song.h"
+#include "Notes.h"
+
+class SMLoader {
+	void LoadFromSMTokens( 
+		CString sNotesType, 
+		CString sDescription,
+		CString sDifficultyClass,
+		CString sMeter,
+		CString sRadarValues,
+		CString sNoteData,		
+		Notes &out);
+
+public:
+	bool LoadFromSMFile( CString sPath, Song &out );
+
+};
+
+#endif