title: Djangocms and django-filer: upload files into a specific folder
body: <p>I set up djangocms 3.1.0 with django-filer 0.9.11 and I created two custom djangocms plug-ins extending django-filer (as explained in <a href="http://django-filer.readthedocs.org/en/latest/extending_filer.html" rel="nofollow">documentation</a>).</p>
  
  <p>Everything works fine but now I need to set just for one of those plug-ins a specific folder in which I want to save uploaded file. At the moment files are saved using <code>DEFAULT_FILER_STORAGES</code> settings.</p>
  
  <p>There is a way to set within a plug-in a specific storage folder?</p>