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/9209100.js

@@ -0,0 +1,8 @@
+function start() {
+    cm.sendOk("You didn't hear it from Rooney? It's a dress-up party, and you can't enter unless you've transformed into something else. I hear that Cliff has something that you may be looking for...");
+    action(1,0,0);
+}
+
+function action(mode, type, selection) {
+    cm.dispose();
+}