PayPal REST Credit Card Payments

[angelleye]

Right now we have Payments Pro DDP and PayFlow, but those require monthly payment packages with PayPal to work.

The REST API does not require any paid package, and you can process credit cards using that, so we need to go ahead and get that built in for credit card payments.

[angelleye]

Opening this up again because a user that downloaded it early is reporting that it doesn't work with coupons included on the order.

05-22-2016 @ 13:00:14 - {"name":"VALIDATION_ERROR","details":[{"field":"transactions","issue":"Item amount must add up to specified amount subtotal (or total if amount details not specified)"}],"message":"Invalid request - see details","information_link":"https://developer.paypal.com/webapps/developer/docs/api/#VALIDATION_ERROR","debug_id":"239cbd6916c2d"}