Remember command's optoins

Store options in file in home folder. 
Use just '.tddium' file, because when I save options and then user enter command without them I can't guess from what host use config file (e.x. '.tddium' or '.tddium.localhost').

https://bugs.tddium.com/bugzilla/show_bug.cgi?id=619
IMO, the server settings should be saved in a different file.  As is, 'tddium logout' may clear the saved setting.
How about `~/.tddium-server`