Revisions for incubator/Horde_Payment/lib/api.php

Assign Copyright to Horde Project and preserve me as author

Return error if there are no methos availabe

Allow to get the transaction even from the module internal id

Move constants inside class

is_a to instanceof

rename $payment global to $payment_driver

No need to pass the app, since the authorization stores the native app.
Move permission check in the void method.

Add methods to get the list of available statuses list and authorization data.

Clean ups and phpdocs fixes

Allow to set minimal and maximal amount for the selected payment method

Fix orders list
Add remember the last listed app

Start working on orders

Allow listing authorizations to the permitted users.
Move authorizations management in its own directory.

Move void handling in a separate method and call the payment method if it supports voiding.

Add authorization permissions. Add voidRequest api call that can be issued only from users with delete permission.

Allow selling application to pass addition data to the payment process. Mainly used to pass the billing address from the selling application to to the payment process. However the additional data are stored in the SESSION, because can be restored by the payment method. This is to prevent spoofing payment ID and see client sensitive information in the filled payment form.

Minor fixes

Update incubator paths and names.
Add getMethods api call to list methods linked to current app

Import Horde_Payment module from Duck.