Now can load and save a project

src/devede/dvd_menu.py

@@ -599,4 +599,14 @@ class dvd_menu(devede.interface_manager.interface_manager):
             processes.append(converter)
             n_page += 1
 
-        return processes,menu_entries
+        return processes,menu_entries
+
+
+    def store_menu(self):
+
+        return self.serialize()
+
+
+    def restore_menu(self,data):
+
+        self.unserialize(data)