It seemed to me that key advice was to create a Release in github which can then be accessed using the CDN. The actual location of the library files is not that important so I decided to leave them where they are as I wasn’t keen on having them in the root folder (personal preference). Admittedly it makes the CDN link longer but then it will be copied and pasted rather than typed from scratch.
All the versions of canvasGUI prior to 0.9.6 where created during the development stage and I believe it is now production ready for release, hence the new version number (1.0.0). I will be not be creating Releases for earlier versions as making them available via CDN is superfluous.
So to use canvasGUI the user just has to copy and paste this link into in the head section of their webpage.
<!-- ======= canvas GUI ============== -->
<script language="javascript" type="text/javascript"
src="https://cdn.jsdelivr.net/gh/quarks/canvasGUI@1.0.0/dist/lib/gui.min.js">
</script>
This is the final link which I have tested in p5js web-editor and have updated all pages on my website that use canvasGUI. Obviously I can not test this in Open Processing.
@rbytes you can send this final link to Sinan 
@GoToLoop thanks for your help and advice. 