title: how to send many2many into openerp through xmlrpc
body: <p>I'm working on a project involving XML-RPC in PHP to connect to OpenERP 6.1.1</p>
  
  <p>I need to create a function that will update a many2many relation, precisely the supplier_taxes_rel of product.template object. </p>
  
  <p>In python, we would do "supplier_taxes_id = '[(6,0,[38, 40])]'".</p>
  
  <p>I am currently using "openerplib.php" from "<a href="https://github.com/b3ni/openerplib" rel="nofollow">https://github.com/b3ni/openerplib</a>", but the library doesn't support this feature.</p>