footer.html

<footer class="site-footer">

  <div class="wrapper">

    <h2 class="footer-heading">{{ site.title | escape }}</h2>

    <div class="footer-col-wrapper">
      <div class="footer-col footer-col-1">
        <ul class="contact-list">
          <li>
            {% if site.author %}
              {{ site.author | escape }}
            {% else %}
              {{ "Department of Economics, PUC-Rio, Gávea, Rio de Janeiro, 22541-041, Brazil" }}
            {% endif %}
            </li>
            {% if site.email %}
            <li><a href="mailto:{{ site.email }}">{{ site.email }}</a></li>
            {% endif %}
        </ul>
      </div>

      <div class="footer-col footer-col-2">
        <ul class="social-media-list">

          {% if site.twitter_username %}<a href="http://twitter.com/{{ site.twitter_username }}">{% include svg-icons/twitter.html %}</a>{% endif %}
          {% if site.github_username %}<a href="http://github.com/{{ site.github_username }}">{% include svg-icons/github.html %}</a>{% endif %}
          {% if site.linkedin_username %}<a href="http://linkedin.com/in/{{ site.linkedin_username }}">{% include svg-icons/linkedin.html %}</a>{% endif %}
          {% if site.stackoverflow_username %}<a href="http://stackoverflow.com/{{ site.stackoverflow_username }}">{% include svg-icons/stackoverflow.html %}</a>{% endif %}

        </ul>
      </div>

    </div>

  </div>

</footer>