Starting stub for hopeful cache reduction.

Now, let's see if we can pull this off.

src/NotesLoaderSM.h

@@ -41,6 +41,12 @@ struct SMLoader
 	 */
 	virtual void TidyUpData( Song &song, bool bFromCache );
 
+	/**
+	 * @brief Retrieve the relevant notedata from the simfile.
+	 * @param path the path where the simfile lives.
+	 * @param out the Steps we are loading the data into. */
+	virtual bool LoadNotedataFromSimfile(const RString &path, Steps &out );
+	
 	/**
 	 * @brief Attempt to load the specified sm file.
 	 * @param sPath a const reference to the path on the hard drive to check.