Shopify/active_merchant — pull request #342 by exact (2012-04-16 01:02:35+00:00)
Title: Updated PayPal Gateway & added support for Order

1. Updated to v84 of PayPal's SOAP API

2. Added support for Order & Authorize Order transactions to PaypalExpressGateway

3. Added support for partial Completes, thereby allowing multiple Captures against an Authorization

4. Added generation of OAuth authentication header from token/secret obtained from PayPal Permissions API