Fix Bug 965071 - Make all occurances of Sketchfab load as HTTPs resources
Fix Bug 965067 - Make Wikipedia always access resources over HTTPS
Fix Bug 965066 - Force Flickr image plugin searches to use HTTPS
Fix Bug 965063 - Force all uses of Google Fonts to use HTTPS
Merge branch 'master' of github.com:mozilla/popcorn.webmaker.org