code: function(body) {
      var $     = cheerio.load(body),
          page  = {};
  
      // Meta signals
      page.title = $('title').text() || null;
      page.description = $('meta[name=description]').attr('content') || null;
      page.author = $('meta[name=author]').attr('content') || null;
      page.keywords = $('meta[name=keywords]').attr('content') || null;
  
      // Heading signals
      var h1s = 0;
      $('h1').each(function() {
        h1s++;
      });
      page.heading1 = $('body h1:first-child').text().trim().replace('\n', '');
      page.totalHeadings = h1s;
  
      // Accessibility signals
      var totalImgs       = 0,
          accessibleImgs  = 0;
      $('img').each(function(index) {
        totalImgs++;
        if ($(this).attr('alt') || $(this).attr('title')) {
          accessibleImgs++;
        }
      });
      page.imgAccessibility = (accessibleImgs / totalImgs) * 100;
      return page;
    }
docs: Parse meta data from an HTTP response body
  
  `body` [String] - The HTML of a web page to parse
  
  Returns an object containing data related to the SEO
  signals of the page that was parsed. Pass the result to
  another function to determine an "SEO score".