Update erp5_commerce to fit the erp5_web multiflex theme, can can now use predicate to specify products who will be display at the top of the content, view the products with a special rendering and add them to a cart.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27053 20353a03-c40f-0410-a6d1-a30d3c3de9de