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>