Fix PlaylistLoader to sort the contents of directories by the file path.

Playlist/PlaylistLoader.m

@@ -272,6 +272,9 @@ NSMutableDictionary * dictionaryWithPropertiesOfObject(id obj, NSArray * filterL
 		}
 	}
     
+    NSSortDescriptor * sd_path = [[NSSortDescriptor alloc] initWithKey:@"path" ascending:YES];
+    [urls sortUsingDescriptors:[NSArray arrayWithObject:sd_path]];
+	
 	return urls;
 }