Download the given url to the given file. When the download
        is aborted by the user, the partially downloaded file is also removed.

def download(self, url, filename, resume=False):
        """
        Download the given url to the given file. When the download
        is aborted by the user, the partially downloaded file is also removed.
        """

        try:
            self._start_download(url, filename, resume)
        except KeyboardInterrupt as e:
            # keep the file if resume is True
            if not resume:
                logging.info('Keyboard Interrupt -- Removing partial file: %s',
                             filename)
                try:
                    os.remove(filename)
                except OSError:
                    pass
            raise e