Shopify/active_merchant — pull request #1350 by louiskearns (2014-08-19 19:31:24+00:00)
Title: add track1 support to first data gge4

Adds track1 support to the first data gge4 gateway, as documented in their [API](https://firstdata.zendesk.com/entries/407571-First-Data-Global-Gateway-e4-Web-Service-API-Reference-Guide#4)

Please review @odorcicd @melari
cc @davidseal