Multi World NPCs + patch on Player interactions

Made NPCs now work properly on multiworld system. Solved multiple issues
regarding Player Shops not giving back items properly when owner exits.
Added restriction on changing channels at FM rooms, preventing shop
owner entering Cash Shop.

scripts/npc/2131002.js

@@ -0,0 +1,10 @@
+/* Author: aaroncsn(MapleSea Like)(Incomplete)
+	NPC Name: 		Euryth
+	Map(s): 		Elin Forest:Altair Camp(300000000)
+	Description: 		Unknown
+*/
+
+function start(){
+	cm.sendOk("My name is Euryth... As you can see, I am a fairy. People tell me I do not act fairy-like, but... I like making things out of metal objects. Shhh, don't tell this to anyone, but I also like MMA.");
+	cm.dispose();
+	}