AIMA code notes - last modified 10/01/03 rennr

* The default wumpus agent is given an arrow but when you use
  (run-environment (make-wumpus-world :aspec '(ask-user-agent))) 
  the agent does not get an arrow because the ask-user-agent does 
  not use the default wumpus-agent. 
* So, you must create an ask-user-wumpus-agent that DOES use the 
  default wumpus agent.
* By adding to the file aima\agents\agents\wumpus.lisp:
 
(defstructure (ask-user-wumpus-agent (:include wumpus-agent 
              (program 'ask-user)))
  "An agent that asks the user to type in an action.")
  
and then activating 'run-environment' like so:
(run-environment (make-wumpus-world :aspec '(ask-user-wumpus-agent)))

the wumpus should scream & die! 

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acknowledgement: WUMPUS fix to make it SCREAM for the 'ASK-USER-AGENT'
                 ----    from P.Bailey - Feb.2002