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/2012000.js

@@ -0,0 +1,33 @@
+var ticket = new Array(4031047, 4031074, 4031331, 4031576);
+var cost = new Array(5000, 6000, 30000, 6000);
+var mapNames = new Array("Ellinia of Victoria Island", "Ludibrium", "Leafre", "Ariant");
+var mapName2 = new Array("Ellinia of Victoria Island", "Ludibrium", "Leafre of Minar Forest", "Nihal Desert");
+var select;
+var status = 0;
+
+function start() {
+    var where = "Hello, I'm in charge of selling tickets for the ship ride for every destination. Which ticket would you like to purchase?";
+    for (var i = 0; i < ticket.length; i++)
+        where += "\r\n#L" + i + "##b" + mapNames[i] + "#k#l";
+    cm.sendSimple(where);
+}
+
+function action(mode, type, selection) {
+    if(mode < 1) {
+        cm.dispose();
+    } else {
+        status++;
+        if (status == 1) {
+            select = selection;
+            cm.sendYesNo("The ride to " + mapName2[select] + " takes off every " + (select == 0 ? 15 : 10) + " minutes, beginning on the hour, and it'll cost you #b"+cost[select]+" mesos#k. Are you sure you want to purchase #b#t"+ticket[select]+"##k?");
+        } else if(status == 2) {
+            if (cm.getMeso() < cost[select] || !cm.canHold(ticket[select]))
+                cm.sendOk("Are you sure you have #b"+cost[select]+" mesos#k? If so, then I urge you to check you etc. inventory, and see if it's full or not.");
+            else {
+                cm.gainMeso(-cost[select]);
+                cm.gainItem(ticket[select],1);
+            }
+            cm.dispose();
+        }
+    }
+}