New approach, paras, headers, blockquotes working, ul wip

markdownjs.html

 		<script>
 			function onDocumentLoad() {
 				document.getElementById('markdowninput').addEventListener('input', onMarkdownChange);
+				setTimeout(onMarkdownChange, 0);
 			}
 			function onMarkdownChange() {
 				let markdown = document.getElementById('markdowninput').value;