title: git branch: gh-pages
body: <p>I have a repo on GitHub. Recently I have discovered GitHub's pages and I want to use them.<br>
  I would like to create this new branch and then, when I need to, either commit on <code>master</code> branch or on <code>gh-pages</code> branch.  </p>
  
  <p>How can I do this? Do I have to create another folder inside my repo?</p>