code: function feed(cb) {
    return function (args) {
      function resultCb(result) {
        result.forEach(function (article) {
          console.log(article.title);
        });
      }
      function jenkinsCb(jenkins) {
        if (args.job) {
          jenkins.parseJobFeed(args.job, cli.exitCb(null, resultCb));
        } else if (args.view) {
          jenkins.parseViewFeed(args.view, cli.exitCb(null, resultCb));
        } else {
          jenkins.parseFeed(cli.exitCb(null, resultCb));
        }
      }
      cb(args, jenkinsCb);
    };
  }
docs: Get a handler that calls Jenkins API to retrieve feed.
  Feed contains articles.
  
  @param {Function} cb: callback for argument handling
  @return Jenkins API handler function