CONTRIBUTORS in activemerchant-1.11.0 vs CONTRIBUTORS in activemerchant-1.12.0

@@ -197,5 +197,21 @@
 
 Barclays ePDQ
 
 * Original code by Rob W (rfwatson)
 * Refactored by Nathaniel Talbott
+
+Federated Canada
+
+* Bob Larrick (deathbob)
+
+NMI
+
+* Nathaniel Talbott (ntalbott)
+
+QBMS
+
+* Will Glozer (wg)
+WorldPay (Feb 17, 2011)
+
+* Original code by Unknown from this patch: https://jadedpixel.lighthouseapp.com/projects/11599/tickets/3-patch-integration-support-for-worldpay-uk
+* Refactored by Soleone
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