More work to integrate tty-prompt into Sheldon's CLI:   * Recall and forget commands now allow selection of cue from list.   * Closing CLI with ctrl+c now terminates gracefully   * Replacement of remaining Thor IO helpers with tty-prompt helpers.   * Tweaking manpage descriptions
More work to integrate tty-prompt into Sheldon's CLI:
  * Recall and forget commands now allow selection of cue from list.
  * Closing CLI with ctrl+c now terminates gracefully
  * Replacement of remaining Thor IO helpers with tty-prompt helpers.
  * Tweaking manpage descriptions

dvjones89/sheldon