Add partner_bank_id column to avoid MemoryError on an existing Odoo
instance with lots of data.
partner_bank_id on account.move.line requires payment_order_ok to be True
which it won't be as it's newly introduced - again nothing to compute.
(see AccountMoveLine._compute_partner_bank_id() in models/account_move_line.py)
context of payment orders, she should ocus on the amount that
is due to be paid. In this method we are forcing to display both
the amount due in company and in the invoice currency.
We then hide the fields debit and credit, because they add no value.
Improvements include:
- full re-organisation of modules and big re-organisation of the code
- simplification of the code related to the fact that support for direct debit is now in t
he base module, not added by an optional module account_direct_debit (module was removed)
- new design of the wizard to select move lines to pay
- support for non-SEPA file transfer-
- support for German direct debit SEPA files (fixes bug #129)
- remove workflow of payment.order
- add wizard of selection of move lines to pay
