code: def move_images_to_cache(source, destination):
      
      if os.path.isdir(destination):
          log.debug('Cached images for this article already exist')
          return
      else:
          log.debug('Cache location: {0}'.format(destination))
          try:
              shutil.copytree(source, destination)
          except:
              log.exception('Images could not be moved to cache')
          else:
              log.info('Moved images to cache'.format(destination))
docs: Handles the movement of images to the cache. Must be helpful if it finds
      that the folder for this article already exists.