Download and set-up the CLARK database using the set_targets.sh script. Use defaults of bacteria for database
        type, and species for taxonomic level
        :param databasepath: path to use to save the database

def clark(self, databasepath):
        """
        Download and set-up the CLARK database using the set_targets.sh script. Use defaults of bacteria for database
        type, and species for taxonomic level
        :param databasepath: path to use to save the database
        """
        if self.clarkpath:
            logging.info('Downloading CLARK database')
            # Create the folder in which the database is to be stored
            databasepath = self.create_database_folder(databasepath, 'clark')
            # Set the call to create the database - use the --light option, as we don't require the full database
            targetcall = 'cd {clarkpath} && ../opt/clark/set_targets.sh {dbpath} bacteria --species --light'\
                .format(clarkpath=self.clarkpath,
                        dbpath=databasepath)
            # Download the database
            self.database_clone(targetcall, databasepath)
        else:
            logging.warning('No CLARK scripts detected in $PATH. Cannot download database.')