So I get the following error in Chrome console:
Mixed Content: The page at 'https://your-username.github.io/' was loaded over HTTPS, but requested an insecure stylesheet 'http://yui.yahooapis.com/pure/0.6.0/pure-min.css'. This request has been blocked; the content must be served over HTTPS.
Basically the yahoo pure library is being served over HTTP. Is the only solution simply to download it and link to it in a "relative directory" format from my index.html page (e.g., "./pure-min.css")?