Reviewed some NPCs looktype & colors

• Review applied to Chemar, Gewen, Grizzly Adams and Uzon

changes based on:
http://tibia.wikia.com/wiki/Chemar
http://tibia.wikia.com/wiki/Gewen
http://tibia.wikia.com/wiki/Grizzly_Adams
http://tibia.wikia.com/wiki/Uzon
Fix on NPC Xelvar

The npc Xelvar now sells teleport crystal for 150gp.

change based on:
http://www.tibiawiki.com.br/wiki/Xelvar
NPC Nurik removed from his spawn

• NPC Nurik removed because his script doesn't exists yet. I will re-add
it when his script be added.