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/1200006.js

@@ -0,0 +1,15 @@
+/**
+----------------------------------------------------------------------------------
+	Whale Between Lith harbor and Rien.
+
+	1200006 Puro
+
+-------Credits:-------------------------------------------------------------------
+	*MapleSanta 
+----------------------------------------------------------------------------------
+**/
+
+function start() {
+    cm.sendOk("The current is serene, wich means we may arive in lith harbor earlier than expected.");
+    cm.dispose();
+}