showreadme.php

<?
add_shortcode('readme','ds_show_readme');
function ds_show_readme() {
	ob_start();
	?>
	<!-- [readme] shortcode -->
	<div id='ds_readme'>
		<?= file_get_contents(__DIR__.'/README.md') ?>
	</div>
	<script src="//cdnjs.cloudflare.com/ajax/libs/showdown/1.7.1/showdown.min.js"></script>
	<script>
	jQuery(window).load(function() {
		var converter = new showdown.Converter();
		converter.setOption('tables', true);
		converter.setOption('tasklists', true);
		converter.setOption('openLinksInNewWindow', true);
		//converter.setOption('headerLevelStart', 2);
		converter.setFlavor('github');
      
		var container = jQuery('#ds_readme');
		var text      = container.html().replace('<','&lt;').replace('>','&gt;');
		var html      = converter.makeHtml(text);	
		container.html(html);
	});
	</script>
	<!-- / [readme] shortcode -->
	<?
	return ob_get_clean();
}
?>