code: function home(req, res) {
    function mtime(key, cb) {
      var repo = repos[key];
      repo.mtime(function(err, date) {
        repo.last_updated = date;
        cb(err, repo);
      });
    }
  
    async.map(Object.keys(repos), mtime, function(err, repos) {
      res.render('home.jade',  { repos: repos });
    });
  }
docs: Actions