Support font with ssl

Hi !

Thanks for this theme. I personally use it (with some minor changes) on my personal web site. 


With **https** and **ssl**, I've got an issue with font : (#7)

I've to change a fews lines in the head.html files. I just remove the **http:** on the *href="http://fonts.googleapis.com/css..."* in order to allows *href="https://fonts.googleapis.com/css..."*

It's seemed to be working for http and https.

Have a good day,
Homeostasie