[IMP] website_sale : Don't show shipping address when only services are into shopping cart.
[MIG]migrate to new api

[IMP]remove unneccessary stuff

[IMP]remove dead code

[IMP]improve the ranking function and some code

[IMP]rename the moethod _postproces_content ro _postprocess_content and improve the mail message disucssion method

[IMP]improve the code