Shopify/active_merchant — pull request #637 by melari (2013-03-28 20:30:08+00:00)
Title: Add referrerId to sage pay form.

**Changes**
Allows a Referral ID to be included in requests to sage pay form.

Not 100% sure this is everything that needs to be changed, but when I tried it out it seemed to be working.

**Review**
@jduff