Allow moving, deleting, and restoring objects in inventory.

Note: only tested in grid mode, and emptying trash is still not implemented.

OpenSim/Region/Examples/SimpleApp/MyNpcCharacter.cs

@@ -111,6 +111,7 @@ namespace SimpleApp
         public event RequestTaskInventory OnRequestTaskInventory;
         public event UpdateInventoryItem OnUpdateInventoryItem;
         public event CopyInventoryItem OnCopyInventoryItem;
+        public event MoveInventoryItem OnMoveInventoryItem;
         public event UDPAssetUploadRequest OnAssetUploadRequest;
         public event XferReceive OnXferReceive;
         public event RequestXfer OnRequestXfer;