[ADD] New module  account_refund_early_payment
[ADD] fields percent, product_id and discount_applied in wizard refund invoice
[ADD] new fields in wizard Refund Invoice depending of Refund Method Early payment, is now in the view
[ADD] default in product_id
[ADD] default percent
[IMP] modification of lines of refund by product_id discount and price_unit
[ADD] reconcile in new refund method
[ADD] amount_total in wizard
[DEL] unnecessary file
[IMP] change method reconcile by reconcile_partial method
[IMP] field amount_total is not readonly
[IMP] pep8, pylint and pyflakes8
[IMP] pep8, pylint and pyflakes8
[IMP] discount lines totalize by taxes
[IMP] pep8, pylint and pyflakes8
Merge pull request #51 from vauxoo-dev/8.0-account_refund_early_payment-dev-yani

8.0 account refund early payment dev yani