Adding Stripe backend to the NewYears project

Hopefully this should work, but I haven't even remotely tested it so there'll probably be a couple of bits wrong with it. Effectively, Stripe was logging the v1/token requests because that's as far as it was getting. As far as I can see, the token object passed to the func in StripeCheckout.configure({}) is a unique ID for those card details. So, you need to pass that to a backend script (scripts/charge.php) along with the amount to actually process it.