removed from Item: update() and save() methods which take the 'url_was_changed' argument

and added ItemModelData (based on morm::ModelData) class which has 'prepare_unique_url' field,
an object of this class is passed to update(), insert() and save() methods

fixed: Dirs::CheckRootDir(): update should update childs too (privileges)

WIP: #4

winixd/functions/cp.cpp

@@ -152,12 +152,13 @@ bool ok = true;
 	if( CopyStaticFile(old_path, new_path) )
 	{
 		//cur->request->status = db->EditFileById(item, item.id);
-		if( !item.update(false, true) )
+		item.propagate_connector();
+
+		if( !item.item_content.update() )
 		{
 			cur->request->status = WINIX_ERR_PERMISSION_DENIED;
 		}
 
-
 		if( item.item_content.file_has_thumb )
 			CopyStaticFile(old_path_thumb, new_path_thumb);
 	}