title: More than one static path in local Flask instance
body: <p>Is that possible to add more static paths for my local dev Flask instance?
  I want to have default <code>static</code> folder for storing js/css/images files for the site and another folder, e.g. <code>designs</code> to keep my specific assets. I don't want to place <code>designs</code> folder inside <code>static</code> if there is a better solution exists.</p>