Allow refunds#274

Hi, can you please add an option that allows administrators to easily refund payments made through your system? This would be very helpful. Thank you

Hugely needed please!

High potential for fraud (multi internal users/admins) and invitation for hacking (external threats) to transaction refunds via payment gateways. Please handle this one with great care. I would say please make this optional for users who takes on the risk for the ease of having this functionality.

I need the ability to refund easily too. Having multiple payment gateways make it difficult to track where payments went to know who to contact to issue refunds. It should be within the app.

This is a must. I do not want to have to login to Stripe every time to refund a customer.