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/9220004.js

@@ -0,0 +1,42 @@
+/** 
+Happy - Happy ville 
+By Ronan
+**/ 
+var status = -1;
+function start() { 
+        if(cm.getMap().getMonsters().size() > 1) {  //reactor as a monster? wtf
+                cm.sendOk("Defeat all monsters before talking to me."); 
+                cm.dispose();
+                return;
+        }
+    
+	action(1, 0, 0); 
+} 
+function action(mode, type, selection) { 
+	if (mode == -1) { 
+		cm.dispose(); 
+	} else {
+                if (status == 0 && mode == 0) { 
+			cm.sendOk("Talk to me again when you want to."); 
+			cm.dispose(); 
+		} 
+                if (mode == 1) 
+                        status++; 
+                else 
+                        status--; 
+                 
+                if (status == 0) { 
+                        cm.sendSimple("#b<Raid Quest: Happyville>#k\r\nA raid is nothing but joining many people in an attempt to defeat extremely powerful creatures. Here is no different. Here, everyone can take part in defeating the spawned creature. At the moment the are none, what will you do?\r\n#b\r\n#L0#Spawn Kid Snowman.\r\n#L1#Spawn Lost Rudolph.\r\n#L2#Nothing, just chilling.#k");
+                } else if(status == 1) {
+                        if(selection == 0) {
+                                cm.getMap().spawnMonsterOnGroundBelow(9500317, 1700, 80);
+                        } else if(selection == 1) {
+                                cm.getMap().spawnMonsterOnGroundBelow(9500320, 1700, 80);
+                        } else {
+                                cm.sendOk("Fine then.");
+                        }
+                        
+                        cm.dispose();
+                }
+        }
+}