CB Paid Subscriptions

Currently on subsequent manual payments if you use the same card it'll add that card to the customer object again and mark it default. It doesn't need to be doing this. Instead we need to be keeping track of payment methods better and compare their finger prints so we don't constantly add duplicate cards to a customers object. While this causes zero issues it does clutter up the management of the customer object at Stripe. This should be entirely doable in getStripeCustomer when a source is sent with the object.