Add function to display repository content

        # update last file

        self.update_last()

    def show(self, verbose=False):

        '''

        List images in repository

        '''

        images = self.db.ask("SELECT md5, name, version, date,\

                author, description, size FROM image").fetchall()

        for image_md5, image_name, image_version, image_date, image_author,\

        image_description, image_size in images:

            out('Name        : %s' % image_name)

            out('Version     : %s' % image_version)

            out('Date        : %s' % time.asctime(time.gmtime(image_date)))

            if verbose:

                out('Description : %s' % image_description)

                out('Author      : %s' % image_author)

                out('MD5         : %s' % image_md5)

                out('Payload :')

                payloads = self.db.ask("SELECT md5, name, size FROM payload\

                                    WHERE image_md5 = ?", (image_md5,)).fetchall()

                for payload_md5, payload_name, payload_size in payloads:

                    out('   Name : %s' % payload_name)

                    out('   Size : %s' % (istools.human_size(payload_size)))

                    out('   MD5  : %s' % payload_md5)

                    out('')

            out('')

    def _remove_file(self, filename):

        '''

        Remove a filename from pool. Check if it's not needed by db before