Change absolute links to relative links to allow subdomain and subfolder sites to both work

This will allow http://blog.geosprocket.io/ and http://wboykinm.github.io/blag/ to co-exist, since one is at the root of a subdomain, and one is in a subfolder of your user-pages.
Merge pull request #1 from nowells/patch-1

Change absolute links to relative links to allow subdomain and subfolder... Awesome; thanks! This is what I get for not learning the web from the ground up . . .