add nigel mcfarlane to credits

browser/base/content/credits.xhtml

@@ -1,4 +1,4 @@
-<!-- -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+<!-- -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 # ***** BEGIN LICENSE BLOCK *****
 # Version: MPL 1.1/GPL 2.0/LGPL 2.1
 #
@@ -253,6 +253,7 @@
             <li>Sarah Liberman</li>
             <li>Scott MacGregor</li>
             <li>Daniel Matejka</li>
+            <li>Nigel McFarlane</li>
             <li>Myk Melez</li>
             <li>Bernd Mielke</li>
             <li>Noririty</li>