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/tools/DatabaseConnection.java

@@ -22,7 +22,9 @@ public class DatabaseConnection {
         if(ds != null) {
             try {
                 return ds.getConnection();
-            } catch (SQLException sqle) {}
+            } catch (SQLException sqle) {
+                sqle.printStackTrace();
+            }
         }
         
         int denies = 0;