Reaction: Support additional payment methods

[bstocks]

Add support for additional payment methods, including a provider oriented toward international markets.

[eahefnawy]

according to your vision on your website, the following payment providers are planned:

• stripe
• square
• google wallet
• braintree
• amazon payments

I'll create a separate issue for each provider in the future as I start working on them. Also, if there's a specific priority for this list, let me know as I'll be working on adding these packages in the future.

Also, mention any additional providers that come to mind.

[CodeWire]

Here is a agnostic, multi-gateway payment processing library https://github.com/thephpleague/omnipay.

I have used it in quite a few projects and its always been a great start when looking to add multiple merchants.

[digitalsanity]

Could ACH/eCheck and "cash" be added to this list?

[choccy]

I second cash aswell, from a lightweight POS aspect.

[ralphilius]

:+1: for Cash. In developing countries, COD (Cash on Delivery) is a vital to success

[aaronjudd]

v0.2.2 adds reaction-braintree, reaction-stripe, reaction-shipping packages.
_These are feature incomplete feature packages (not tested, just migrated and updated inline to current codebase)._

This release also adds functionality to allow multiple payment provider templates (loop and display). #246 suggests a more elegant payment interface.

129 is the issue for COD/Cash.

Please feel free to create a new issue for new payment providers, services that you feel would be useful.

[ClintEsteMadera]

I humbly recommend adding support for Mercado Pago (http://www.mercadopago.com/) which is used by 90,000,000 customers in Latin America.