npcchange and hopefully fixed x64 10-15 min crash

Changed some details in the npcs and such.

Also hopefully this fix will stop the crash some users had on x64
server.

(removed "return true" from Nahlesar.lua onThink() function
fix for the npc error msges

fixed the errors in lua scripts
some more npc changes

fixed sandra and bone master syntax
Merge pull request #131 from exura/master

Npc changes and possible crashfix for x64