title: Amazon Product Advertising API Top Seller response group does not return other item attributes
body: <p>I've been using this code:</p>
  
  <pre><code>defined('AWS_API_KEY') or define('AWS_API_KEY', 'AGGAVZCVASDG123A');
  defined('AWS_API_SECRET_KEY') or define('AWS_API_SECRET_KEY', '132131235151asdfaGFfasdf');
  defined('AWS_ASSOCIATE_TAG') or define('AWS_ASSOCIATE_TAG', 'test05-12');
  $amazonEcs = new AmazonECS(AWS_API_KEY, AWS_API_SECRET_KEY, 'com', AWS_ASSOCIATE_TAG);
  $amazonEcs-&gt;associateTag(AWS_ASSOCIATE_TAG);
  $amazonEcs-&gt;returnType(AmazonECS::RETURN_TYPE_ARRAY);
  
  $response = $amazonEcs-&gt;responseGroup('TopSellers')-&gt;browseNodeLookup($node);
  </code></pre>
  
  <p>Unfortunately this code does not return the product's Price, Images and other attributes. 
  It only returns this result:</p>
  
  <pre><code>&lt;TopItemSet&gt;
     &lt;Type&gt;TopSellers&lt;/Type&gt;
     &lt;TopItem&gt;
              &lt;ASIN&gt;0553576399&lt;/ASIN&gt;
              &lt;Title&gt;Distraction&lt;/Title&gt;
              &lt;ProductGroup&gt;Book&lt;/ProductGroup&gt;
              &lt;Author&gt;Bruce Sterling&lt;/Author&gt;
         &lt;/TopItem&gt;
         &lt;TopItem&gt;
          ....
         .....
  &lt;/TopItemSet&gt;
  </code></pre>
  
  <p><strong>Is there a way I can show those when calling the <code>TopSellers</code> response group?</strong> </p>
  
  <p>I have a solution before that everytime I call <code>TopSellers</code>, I get the ASIN of the items that the TopSellers produced(they produced 10 top seller items), then I use this code:</p>
  
  <pre><code>$response = $amazonEcs-&gt;responseGroup('Images,ItemAttributes')-&gt;page(1)-&gt;category('All')-&gt;search($asin);
  </code></pre>
  
  <p>That would do a searching of the product that is based on the ASIN that the TopSeller response group produced. The only problem with this code is that it will cause a <code>throttled error</code>. Throttled Error means the my request limit on amazon api have exceeded, because obviously that code is kinda exhausting to call because it keeps on requesting data from API.</p>
  
  <p>I've been reading the docs of Product Advertising API here <a href="http://docs.aws.amazon.com/AWSECommerceService/latest/DG/RG_TopSellers.html" rel="nofollow">http://docs.aws.amazon.com/AWSECommerceService/latest/DG/RG_TopSellers.html</a></p>
  
  <p>Your thoughts will be greatly appreciated!</p>