The vue components relevant to stripe were replaced with payeer's
components. A function was added to the user's controller to ease
transaction completion logic. Storing the paying state in the database is
more provider agnostic and avoids having to learn the request parameters
of payeer's redirects.

The representation of credits amounts was increased by a factor of 100
to make minimum order amounts more realistic, and pricing information
more readable. The view and order controller now validate that the
quantity requested is within the service's limits.

Checkboxes and function changes were also made for for optionally saving
cards. The new payment-card component needed to be created to mount the
stripe card correctly after DOM changes.