debug: the order of regexp maching was incorrect (should be /reg/ === var);
debug: spell miss for @frame;
devsim/ show progress;
use Msg.usage in testmodule;
Msg: remove unused module methods (warn,alert,hidden);
Msg: remove fatal() and add alert() as instance method
     and use it for display error content in rescue instead of warn;
Msg.alert() is no param , show Error class instead;
Msg.relay() is added for relay error;