RubaXa/rubaxa.github.io — pull request #3 by PeterDaveHello (2014-07-10 07:42:08+00:00)
Title: use protocol-relative URL to load resources

browser will tell users that the page contains some insecure resources, use protocol-relative URL can prevent this issue.

reference : [The Protocol-relative URL](http://www.paulirish.com/2010/the-protocol-relative-url/)