libsaria: Added library::update()

This will rescan every library path and add new files to the library.
Eventually it should probably remove files that no longer exist...

include/libsaria/library.h

@@ -18,6 +18,7 @@ namespace libsaria
 
 		void load();
 		void save();
+		void update();
 		void refresh();
 
 		void add_path(string);

libsaria/library/library.cpp

@@ -69,6 +69,13 @@ namespace libsaria
 			it->second.get_info(info_func);
 	}
 
+	void library::update()
+	{
+		map<string, LibraryPath>::iterator it;
+		for (it = path_map.begin(); it != path_map.end(); it++)
+			it->second.update();
+	}
+
 	void library::play_id(ino_t id)
 	{
 		map<string, LibraryPath>::iterator it;