Replace Wordpress icon with one taken from its Debian package

I was unable to determine a specific author or copyright holder
for this icon, and listing every potential Wordpress copyright holder
in debian/copyright seems ridiculous.

debian/copyright

@@ -218,6 +218,14 @@ License: LGPL-2.1+
 Comment:
  taken from data/icons/16x16/ in gnome-online-accounts git
 
+Files: underlays/openid-selector/ikiwiki/openid/wordpress.png
+Copyright:
+ © 2003-2013 "the contributors"
+License: GPL-2+
+Comment:
+ taken from wp-admin/images/w-logo-blue.png in wordpress/3.8.1+dfsg1-1
+ and trivially modified (resized to 16x16, placed on a white background)
+
 Files: underlays/jquery/*
 Copyright: © 2005-2011 by John Resig, Branden Aaron & Jörn Zaefferer
            © 2011 The Dojo Foundation

underlays/openid-selector/ikiwiki/openid/openid-jquery.js

@@ -38,7 +38,7 @@ var providers_small = {
     },
     wordpress: {
         name: 'Wordpress',
-	icon: 'https://s2.wp.com/i/favicon.ico',
+	icon: 'ikiwiki/openid/wordpress.png',
         label: 'Enter your Wordpress.com username:',
         url: 'http://{username}.wordpress.com/'
     },