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/2082003.js

@@ -0,0 +1,11 @@
+function start() {
+cm.sendSimple("If you had wings, I'm sure you could go there.  But, that alone won't be enough.  If you want to fly though the wind that's sharper than a blade, you'll need tough scales as well.  I'm the only Halfling left that knows the way back... If you want to go there, I can transform you.  No matter what you are, for this moment, you will become a #bDragon#k...\r\n #L0##bI want to become a dragon.#k#l");
+}
+
+function action(m, t, s) {
+   if (m > 0){
+      cm.useItem(2210016);
+      cm.warp(200090500, 0);
+   }
+   cm.dispose();
+}