title: Subclassing django's fileField form's widget?
body: <p>I have uploading working just fine, but the problem is, I would like to filter out all file types that are not needed.
  I know with html, you can use something like:</p>
  
  <p><code>&lt;input type="file" name="file" accept="image/*" id="file"&gt; &lt;input type="submit" name="submit" value="Upload Image!"&gt;</code></p>
  
  <p>and in this case, this tells the browser to only show image files in the file dialog box.</p>
  
  <p>I can't figure out how I can add the accept="image/*" to Django's widget.</p>
  
  <p>Any help is most welcomed!</p>