message: fix html error handling. Redirect to /404 or /500
diff: @@ -67,8 +67,11 @@ exports.handler = function(err, req, res, next) {
  return res.send(err);
  }
  - var errorPath = req.app.get('redirect') + err.className;
  - res.redirect(errorPath);
  + if (err.code === 404) {
  + res.redirect('/404');
  + }
  +
  + res.redirect('/500');
  },
  'application/json': function(){
  