clearn procedure, should be reflected in session.

procedure.go

@@ -47,6 +47,8 @@ func cleanProcedure(openID, procedure string) {
 	path := getProcedurePath(openID, procedure)
 	os.Remove(path)
 	log.Println("Clearing [" + openID + "] @ [" + procedure + "]")
+
+	//TODO: save session to "" procedure
 }
 
 func processProcedureState(state chatState) (err error) {