Customer portal controller and templates contained in website_payment
module are moved to payment. This module now uses the customer portal
defined in portal module and most of website_payment code is moved
to payment.
website_payment now contain code really related to website, such as
payment acquirers configuration for website.
- Preserved explicit 3rd-party copyright notices
- Explicit boilerplate should not be necessary - copyright law applies
automatically in all countries thanks to Berne Convention + WTO rules,
and a reference to the applicable license is clear enough.