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
The problem with removing the test is that there's then nothing that actually validates the end-to-end functionality of setting the server.