Odoo 9.0 module: Discount on Sales order and invoice

Create a section at the bottom of the sales order and invoice for discount as a dedicated line item. Entered as a percent. Add discount percent as an editable field on Sales Order screen (persist on the [login to view URL] data model). Calculate discount amount and include in the bottom section of Sales Order Add discount amount to the printed Quotation / Sales Order page. Add discount percent as an editable field on Invoice screen (persist on the [login to view URL] data model). Calculate discount amount and include in the bottom section of Invoice Add discount amount to the printed Invoice page. Automatically carry discount amount from Sales Order to Customer Invoice on invoice creation. Assign a financial account to the discount amounts (company setting / property) Automatically record discount accounting line item in the invoice journal entry. Facilitate searching and reporting on discount amounts (both on Sales Orders and on Invoices). Add discount percent as an editable field on Customer screen (persist on [login to view URL] data model). Use customer discount to default the discount percent on new Sales Orders and Invoices. Test and fix