code: function scrapePage(cb, pages, links) {
    links = links || [];
    pages = pages || basePages.slice();
  
    var url = pages.pop();
  
    jsdom.env({
      url: url,
      scripts: ['http://code.jquery.com/jquery.js'],
      done: function(err, window){
        if (err) return cb(err);
        _getLinks(window, links);
        if (!pages.length) return cb(null, links);
        scrapePage(cb, pages, links);
      }
    });
  }
docs: Scrape a page
  
  @param {Function} cb
  @param {Number} pages - max number of pages
  @param {String} links - the links accumulated thus far
  @return undefined
  @api public