[ADD] website_sale: added orders history page accessible using My Orders link below My Account. This page allows a user to see its sale orders as well as download the corresponding invoices
[ADD] website_sale_stock: added delivery orders display on My Orders page when sale_stock and website_sale are installed
[ADD] website_sale_digital: allows the user to set a product as digital product and use the attachments to sell files. The download link is added on the My Orders page when the payment is confirmed