AmoriaPQ + ItemSort fix + revamped GMShop

Implemented AmoriaPQ. Fixed an issue with ItemIdSortHandler where empty
vectors given to the sorting module would cause an exception thrown,
wiping players inventory items. Thanks to Vcoc, revamped shop data for
GMShop (shop id 1337). Mount quest for explorers now uses event script.

scripts/npc/1061009.js

@@ -19,7 +19,10 @@
     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
-/* 1061009 - Door of Dimension
+/*
+        @Author Ronan
+
+        1061009 - Door of Dimension
 	Enter 3rd job event
 */