Shopify/active_merchant — pull request #1200 by alevett (2014-05-15 13:47:51+00:00)
Title: Wirecard: Fix AVS parsing bug & handle Amex AVS response codes

Fixes bug in Wirecard's ActiveMerchant implementation that is preventing ActiveMerchant::Billing::Response from being populated with the AVS failure details.

Maps Amex AVS response codes to Wirecard.

Fixes CVV field bug.