fix iodine issue

seasalt.php

<?php

function iodine_is_active() {
	if ( !class_exists('Iodine_Plugin') ) {
	?>
    <div class="notice notice-error is-dismissible">
        <p>
            <a target="_blank"
               href="https://github.com/saltnpixels/Iodine"> <?php _e( 'This theme works best with iodine installed!!', 'digipress' ); ?></a>
        </p>
    </div>
	<?php }
}

add_action( 'admin_notices', 'iodine_is_active' );