Update it_IT translation files using autotranslator tool.

htdocs/langs/it_IT/admin.lang

htdocs/langs/it_IT/agenda.lang

htdocs/langs/it_IT/banks.lang

htdocs/langs/it_IT/bills.lang

htdocs/langs/it_IT/boxes.lang

htdocs/langs/it_IT/categories.lang

htdocs/langs/it_IT/companies.lang

htdocs/langs/it_IT/compta.lang

htdocs/langs/it_IT/contracts.lang

htdocs/langs/it_IT/deliveries.lang

htdocs/langs/it_IT/ecm.lang

htdocs/langs/it_IT/errors.lang

htdocs/langs/it_IT/install.lang

htdocs/langs/it_IT/interventions.lang

htdocs/langs/it_IT/mails.lang

htdocs/langs/it_IT/main.lang

htdocs/langs/it_IT/members.lang

htdocs/langs/it_IT/orders.lang

htdocs/langs/it_IT/oscommerce.lang

htdocs/langs/it_IT/other.lang