Use HTTPS to fetch from MathJax CDN
Use HTTPS to fetch from MathJax CDN

Github Pages will redirect to HTTPS.
e.g. GET http://jacquerie.github.io/sunflower/ will 301 to https://jacquerie.github.io/sunflower/

Loading the Javascript from HTTPS as well will ensure that it will run in most browsers.
jacquerie/sunflower,jacquerie/sunflower