You need the bootstrap library also, which also requires the jQuery library, add those both in head tags of your html. (first jQuery, then boostrap.js, then wsiwyg).
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<script src="https://mindmup.s3.amazonaws.com/lib/jquery.hotkeys.js"></script>
<script src="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/js/bootstrap.min.js"></script>
<script src="http://twitter.github.com/bootstrap/assets/js/google-code-prettify/prettify.js"></script>