title: TastyPie: is it possible to post multiple files in a bulk request
body: <p>I would like to make a bulk post.
  The problem is that each item requires an image (or, maybe even a few).
  Is it possible to do this via bulk request?</p>
  
  <p>The model:</p>
  
  <pre><code>class CollageItem(models.Model):
    url = models.URLField(null = True)
    image = models.FileField(upload_to = 'i')
    thumbnail = models.FileField(upload_to = 't')
  </code></pre>
  
  <p>And the TastyPie object:</p>
  
  <pre><code>class CollageItemResource(ModelResource):
    image = fields.FileField(attribute = 'image', null = True, blank = true)
    thumbnail = fields.FileField(attribute = 'thumbnail', null = True, blank = true)
    class Meta:
      queryset = CollageItem.objects.all(
      resource_name = "collage_item"
  </code></pre>
  
  <p>Can I post multiple images using bulk request or should I revert to individual posts?</p>