Add a HTML source editing button for Simditor. Use js-beautify for HTML formatting.
###Usage
Reference button and dependency script on your page with Simditor:
<script type="text/javascript" src="[path]/beautify-html.js"></script>
<script type="text/javascript" src="[path]/simditor-html.js"></script>
<link rel="stylesheet" href="[path]/simditor-html.css" media="screen" charset="utf-8" />
Add html button config when you initialize Simditor:
var editor = new Simditor({
textarea: $('#txt-editor'),
toolbar: ['bold', 'italic', 'underline', 'color', '|', 'ol', 'ul', '|', 'html']
});