control commodity.php 修改
 function invoicingLog (未完成)
backend lang 新增
 lang['item_in']
 lang['item_up']
commodity lang 新增
 $lang['commodity_account']
 $lang['commodity_IP']
 $lang['commodity_invoicing_static0']
 $lang['commodity_invoicing_static1']
model items_purchase 修改
  function Select (未完成)
view itemList 修改