start-ffhh/_includes/footer.html

<footer class="site-footer">

  <div class="wrap row">
    <div class="col-lg-4">
      <ul>
        {% if site.github_username %}<li>
          <span class="fa fa-github-alt"></span>
          <a href="https://github.com/{{ site.github_username }}">
            <span class="username">{{ site.github_username }}</span>
          </a>
        </li>{% endif %}
        {% if site.twitter_username %}<li>
          <span class="fa fa-twitter"></span>
          <a href="https://twitter.com/{{ site.twitter_username }}">
            <span class="username">{{ site.twitter_username }}</span>
          </a>
        </li>{% endif %}
      </ul>
    </div>

    <div class="col-lg-4 text-center">
        <img src="/images/cc-by-sa.png">
    </div>

    <div class="col-lg-4">
      <p class="text">{{ site.description }}</p>
    </div>

  </div>

</footer>