CONTRIBUTORS in activemerchant-1.55.0 vs CONTRIBUTORS in activemerchant-1.56.0

- old
+ new

@@ -560,5 +560,9 @@ * Washington L Braga Jr (huoxito) Clearhaus (October 2015) * Dinesh Yadav (dinesh) + +Cardknox (November 2015) + +* (dlehren)