Updated doHelp() to match updated module description in Commit ec48f11 (ec48f114d8 (diff-baad512c11a603dedf1cf7f391e341bd))
Also altered help logic so the help message is always DM'd to user to assist new users who struggle to find how to begin a dm session and to improve general usability.
Further added a self tip check to sendLbc() to prevent duplicate messages being received by the user, so as to make clear that the tip is only being sent once.
