Enable quick logoff and default hotkey alias

Example youtube video:
http://www.youtube.com/watch?v=nk1aHizz1rU&feature=youtu.be

This change removes the dialog box that says "Are you sure you want to quit?" when sending a typed "quit" command.  It also changes the default F12 hotkey alias from "help" to "quit."

Having a dialog box that asks you if you really want to logoff makes no sense in the current implementation.  Logging is the most important ability any character has.  Many players have figured out how to write macros to alt-f4, putting other players at a disadvantage.  Logging off by accident has almost no downside, while not logging off in time can mean death so the confirmation question can be removed.

This change evens the playing field.  If you are being attacked you can hit F12 and log.  Everyone gets the same ability and it streamlines the user interface by removing an unecessary prompt.

F1 and F12 by default have the same hotkey alias bind (help) so replacing F12 with quit makes sense.