Switch avatars to be built out of CSS and only overlayed with the gravatar when a non-default exists

static/js/services/features-config.js

@@ -71,5 +71,10 @@ angular.module('quay').factory('Config', [function() {
     return value;
   };
 
+  config.isNewLayout = function() {
+    // TODO(jschorr): Remove once new layout is in place for everyone.
+    return document.cookie.toString().indexOf('quay.exp-new-layout=true') >= 0;
+  };
+
   return config;
 }]);