This change adds cleaner extension points for calculating a sales line's base price and quantity. It makes it easier to support promotions such as extra discounts or buy-two-get-one offers without changing core sales code.

With these hooks, additions like a second or third discount, or 3x2 like offers, can be made in a clean way, without rewriting functions in the core.

Also made a PR for 8.0: https://github.com/odoo/odoo/pull/1470

References to the former OpenERP name were updated to Odoo in the mail followers area. This keeps product wording consistent with the current company and product brand, with no expected change to day-to-day functionality.

Change OpenERP to Odoo