Add support for FontAwesome CDN
Descriptions of the CDN I could find:
The CDN supposedly serves only CSS, icons and customized (site-specific) JavaScript, so it wouldn't be a candidate for inclusion into Decentraleyes. But I found non-customized JavaScript from FontAwesome CDN in the wild:
<script defer src="https://use.fontawesome.com/releases/v5.0.10/js/all.js" integrity="sha384-slN8GvtUJGnv6ca26v8EzVaR9DC58QEwsIk9q1QXdCU8Yu8ck/tL/5szYlBbqmS+" crossorigin="anonymous"></script>
I have no idea how the (seemingly quite overcomplicated) FontAwesome system works and what this JavaScript library does. I couldn't find any mention of it in the docs. More information about it would be welcome.