adds deploy using github pages
makes link correctly visible
updated with instructions to have output as a clone of the git repo and checked out to gh-pages
merged the remote change....
adds sub level headers to the github pages section
change the git remote

Adds description how to change the git remote.
Merge branch 'master' of https://github.com/froderik/nanoc-site into froderik-master
Improve formatting of GitHub deployment section