A user can submit a payment

After several hours of research, I've settled on stripe connect instead of crowd-tilt for payment processing, due to PCI compliance and IRS 1099 reporting features in stripe.

Installed stripe and created a simple payment page.
Liane, is this what you did?:

```ruby
Stripe::Charge.create(
   customer: customer.id,
   amount: @amount_in_cents,
   description: "GPH Test Stripe customer",
   currency: DEFAULT_CURRENCY
)
```