title: GAE Blobstore: ImagesService.getServingUrl() gives me smaller images
body: <p>I'm uploading some images to GAE's Blobstore. Upload goes succesfully and when i see the images in GAE console i can see that they're stored in the expected size and resolution.</p>
  
  <p>According to <a href="http://ikaisays.com/2010/09/08/gwt-blobstore-the-new-high-performance-image-serving-api-and-cute-dogs-on-office-chairs/">this site</a>, to get a URL to the uploaded image i can use this:</p>
  
  <pre><code>BlobKey blobKey = (BlobKey) blobs.get("image");
  ImagesService imagesService = ImagesServiceFactory.getImagesService();
  String imageUrl = imagesService.getServingUrl(blobKey);
  </code></pre>
  
  <p>The resulting URL points to a smaller version of the uploaded images (in size and quality). How can i get a URL to the full size image stored in Blobstore?</p>