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/1061016.js

@@ -0,0 +1,34 @@
+var status = -1;
+var itemids = Array(2040728, 2040729, 2040730, 2040731, 2040732, 2040733, 2040734, 2040735, 2040736, 2040737, 2040738, 2040739);
+
+function start() {
+	action(1, 0, 0);
+}
+
+function action(mode, type, selection) {
+	if (mode != 1) {
+		cm.dispose();
+		return;
+	}
+	status++;
+	if (status == 0) {
+		cm.sendSimple("Hello, #h0#. I can exchange your Balrog Leathers.\r\n\r\n#r#L1#Redeem items#l#k");
+	} else if (status == 1) {
+		var selStr = "Well, okay. These are what you can redeem...\r\n\r\n#b";
+		for (var i = 0; i < itemids.length; i++) {
+			selStr += "#L" + i + "##i" + itemids[i] + "##z" + itemids[i] + "##l\r\n";
+		}
+		cm.sendSimple(selStr);
+	} else if (status == 2) {
+		if (!cm.canHold(itemids[selection], 1)) {
+			cm.sendOk("Please make room");
+		} else if (cm.itemQuantity(4001261) < 1) {
+			cm.sendOk("You don't have enough leathers.");
+		} else {
+			cm.gainItem(4001261, -1);
+			cm.gainItem(itemids[selection], 1);
+			cm.sendOk("Thank you for your redemption");
+		}
+		cm.dispose();
+	}
+}