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/2041000.js

@@ -0,0 +1,32 @@
+function start() {
+    if(cm.haveItem(4031045)){
+        var em = cm.getEventManager("Trains");
+        if (em.getProperty("entry") == "true")
+            cm.sendYesNo("Do you want to go to Orbis?");
+        else{
+            cm.sendOk("The train to Orbis is already travelling, please be patient for the next one.");
+            cm.dispose();
+        }
+    }else{
+        cm.sendOk("Make sure you got a Orbis ticket to travel in this train. Check your inventory.");
+        cm.dispose();
+    }
+}
+function action(mode, type, selection) {
+    if (mode <= 0) {
+	cm.sendOk("Okay, talk to me if you change your mind!");
+        cm.dispose();
+	return;
+    } 
+    
+    var em = cm.getEventManager("Trains");
+    if (em.getProperty("entry") == "true") {
+        cm.warp(220000111);
+        cm.gainItem(4031045, -1);
+        cm.dispose();
+    }
+    else {
+        cm.sendOk("The train to Orbis is ready to take off, please be patient for the next one.");
+        cm.dispose();
+    }
+}