title: removing downloaded images when RestKit delete Objects
body: <p>I want RestKit to automatically download object's image property (i.e my site.com/images/photo01.jpg) and when removing that object after syncing with server delete its downloaded images. </p>
  
  <p>an example:</p>
  
  <pre><code>product 
  {
    name:product1,
    image:www.mysite.com/images/photo01.jpg
  }
  </code></pre>
  
  <p>after syncing with core data</p>
  
  <pre><code>product
  {
    name:product1,
    image: /documents/photo01.jpg
  }
  </code></pre>
  
  <p>here I want RestKit automatically download the image and assign local path as product image property.</p>
  
  <p>and after syncing with server if I have deleted that object on the server, RestKit delete that image file in the local store too.</p>
  
  <p>is that possible? How can I achieve this?</p>