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     known nerve-names to run on the npc's
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input always is: {nervename, npc, ev, settings} 

"sleep"                 NPC is switched inactive ('sleep-mode')
"command"               NPC is obeying a master directly! (overlays speech!)
                          -> command keywords:
                            -"follow"   (order to follow the player)
"EnterReaction"         NPC is reacting on a PC entering his bark-area
"LeaveReaction"         NPC is leaving the requested area!
"Combat"                NPC is fighting something!
"Disengage"             NPC is being disengaged by his enemy!
"idle"                  NPC is awake but got nothing to do but daily life...
"ItemGiven"             NPC has received an item!
"Speech"                the NPC heard something nearby....
"GSpeech"               the NPC heard something a ghost said....
"DblClick"              the NPC has been dclicked by a player...
"Flee"                  the NPC is trying to escape....
"Win"                   the NPC has killed an enemy... and celebrates it now?
"Virtual"       `       the NPC is doing something not really known... -> custom 


Note: 
Initial setup of the NPC is NOT (!) a nerve!!!
