Reworked Autoassigner & Hero's Will & Trade + Visual NX + New commands

Reworked autoassigner (improved limits between required secondary and
surplus primary stats). Hero's will removes most of diseases, tonic
removes slow. Added visual info for collected NX cards. Added commands
cake (cake boss with customizable HP) and setgmlevel. Reworked Trade
system now checking for slots smartly (instead of just checking for
empty slots).

src/server/MapleTrade.java

@@ -22,24 +22,24 @@
 package server;
 
 import java.util.ArrayList;
-import java.util.LinkedHashMap;
 import java.util.LinkedList;
 import java.util.List;
-import java.util.Map;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 import tools.LogHelper;
 import tools.MaplePacketCreator;
 import client.MapleCharacter;
 import client.inventory.Item;
+import client.inventory.MapleInventory;
 import client.inventory.MapleInventoryType;
 import constants.ItemConstants;
 import constants.ServerConstants;
+import tools.Pair;
 
 /**
  *
  * @author Matze
- * @author Ronan (concurrency safety)
+ * @author Ronan (concurrency safety & check available slots)
  */
 public class MapleTrade {
     private MapleTrade partner = null;
@@ -192,22 +192,12 @@ public class MapleTrade {
     }
     
     private boolean fitsInInventory() {
-        MapleItemInformationProvider mii = MapleItemInformationProvider.getInstance();
-        Map<MapleInventoryType, Integer> neededSlots = new LinkedHashMap<>();
+        List<Pair<Item, MapleInventoryType>> tradeItems = new LinkedList<>();
         for (Item item : exchangeItems) {
-            MapleInventoryType type = mii.getInventoryType(item.getItemId());
-            if (neededSlots.get(type) == null) {
-                neededSlots.put(type, 1);
-            } else {
-                neededSlots.put(type, neededSlots.get(type) + 1);
-            }
+            tradeItems.add(new Pair(item, MapleItemInformationProvider.getInstance().getInventoryType(item.getItemId())));
         }
-        for (Map.Entry<MapleInventoryType, Integer> entry : neededSlots.entrySet()) {
-            if (chr.getInventory(entry.getKey()).isFull(entry.getValue() - 1)) {
-                return false;
-            }
-        }
-        return true;
+        
+        return MapleInventory.checkSpotsAndOwnership(chr, tradeItems);
     }
 
     public static void completeTrade(MapleCharacter c) {