This commit adds a new model, Payment Method, which stores
a reference to the payment acquirer's database and a reference to
a partner. Each payment module must have its own implementation.
The implementation is completely abstract but may not suit every
provider's way of implementing recurring payments.
- added a call to _migrate_paypal_account in the payment_paypal data that
does the migration from company.paypal_account (char field) to a payment.acquirer
and company.paypal_account becoming a function field, with a getter / setter.
This function field is company aware.
- added an update of the res_config view of invoicing to link to the list
of acquirers
- added possibilty to install acquirers from invoicing (paypal / ogone / adyen
are installable through config)
bzr revid: tde@openerp.com-20140123150135-07b4pkbjade6vimq