fix(nodeserver): add dummy favicon.ico to silence 404s

lib/nodeserver/server.js

@@ -92,6 +92,10 @@ StaticServlet.prototype.handleRequest = function(req, res) {
   if (parts[parts.length-1].charAt(0) === '.')
     return self.sendForbidden_(req, res, path);
 
+  // favicon rewriting
+  if (path === './favicon.ico')
+    return self.sendFile_(req, res, './lib/nodeserver/favicon.ico');
+
   // docs rewriting
   var REWRITE = /\/(guide|api|cookbook|misc|tutorial).*$/,
       IGNORED = /(\.(css|js|png|jpg)$|partials\/.*\.html$)/,