NOTIFY on roasting_log changes

config/Windows/navigation.xml

 			query = query.invalidate();
 		};
 		
+		/* Asynchronous notifications */
+		var DBUpdateNotifications = function() {
+			var query = new new QSqlQuery;
+			query.exec("CREATE OR REPLACE FUNCTION notify_roasting_log_change() RETURNS TRIGGER AS $$ BEGIN NOTIFY RoastingLogChange; END; $$ LANGUAGE plpgsql");
+			query.exec("CREATE TRIGGER notify_roasting_log_change AFTER INSERT OR UPDATE ON roasting_log FOR EACH STATEMENT EXECUTE PROCEDURE notify_roasting_log_change()");
+			query = query.invalidate();
+		};
+		
 		query = new QSqlQuery();
 		/* A table keeps track of database versioning information. This table is created
 		   if required. */
 				DBUpdateMultiUser();
 				DBUpdateHistory();
 			}
+			if(query.value(2) < 3)
+			{
+				DBUpdateNotifications();
+			}
 		}
 		else
 		{