Add bank payment method

[giuliopons]

Actually only Paypal and Coinbase payment methods are available.

A simple "manual" method could be bank payment outside the AdAdmin software.

The bank payment methods list shows payments details and invite the user to pay outside AdAdmin.
The banner is uploaded and placed in a waiting for payment (like the Coinbase process when it waits from blockchain confirmation).

Upvote if you want this feature.