duplicate content & feature request

Hi,

as we had some SEO issues with your plugin, it would be nice to make it possible to set the download links to rel=”nofollow”. In our case, google crawled the PDF files (same as the post) with duplicate content and showed the pdf links instead of the post links. I have set it manually in the class-read-offline-ux.php, but it would be better to have a checkbox in the backend, because this change is lost after the next plugin update.

Another solution would be to show the download links only for registered users. Maybe with a checkbox in the backend to set it for non or registered users. In our case, i’ve inserted an if case [is_user_logged_in()] to check this.

Thanks!