Provides current status of processing episode.

        Structure of status:

            original_filename => formatted_filename, state, messages

        :returns: mapping of current processing state
        :rtype: dict

def status(self):
        """Provides current status of processing episode.

        Structure of status:

            original_filename => formatted_filename, state, messages

        :returns: mapping of current processing state
        :rtype: dict
        """
        return {
            self.original: {
                'formatted_filename': self.out_location,
                'state': self.state,
                'messages': '\n\t'.join(self.messages),
            }
        }