Add anchors to all page headings, GitHub style.
<h1>My super Awesome heading</h1>
will be converted to:
<h1 id="my-super-awesome-heading">
<a href="#my-super-awesome-heading" class="anchor">§</a>
My super Awesome heading
</h1>
See the Pen Anchor on CodePen.
Because it's nice to give attribution.