Improved item & drop-point checking + Dojo fixes + Duey revamp

Fixed some issues with items being dropped sometimes out-of-reach and in a weird way.
Improved item checking function, now looking up one-of-a-kind items properly.
Fixed some issues with dojo skills and possible exploits in dojo progression.
Improved Duey, now displaying better info to players.

src/client/inventory/Item.java

@@ -21,6 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 package client.inventory;
 
+import constants.ItemConstants;
 import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
@@ -93,7 +94,11 @@ public class Item implements Comparable<Item> {
         return quantity;
     }
 
-    public byte getType() {
+    public MapleInventoryType getInventoryType() {
+        return ItemConstants.getInventoryType(id);
+    }
+    
+    public byte getItemType() { // 1: equip, 3: pet, 2: other
         if (getPetId() > -1) {
             return 3;
         }