A port of the Casper theme from Ghost, via https://github.com/vjeantet/hugo-theme-casper/

License is MIT

Included is a copy of Genericons, which is GPLv2

The Silk Road image is CC licensed from
[Jonathan Kos-Read](http://www.flickr.com/photos/jonathankosread/)

Special variables

* TWITTER_URL
* GITHUB_URL
* BANNER_URL