//sml h                       -  help.
//sml t (class) (threshold)   -  set the minimum probability of belonging to a class to block.
//sml a (allow word)          -  allow yells with key phrases to pass through without scoring.
//sml r (allow word index)    -  remove an allow word.
//sml d                       -  debug (show classification probabilities).
//sml show                    -  show content window.
//sml hide                    -  hide content window.
//sml ct                      -  set max time to keep a yell on the content window after last shout.