Render live demo link for themes if there is one
<p><b>Author:</b> {{page.extra.author.name}}</p>
<p><b>License:</b> {{page.extra.license}}</p>
<p><b>Homepage:</b> <a href="{{page.extra.homepage}}">{{page.extra.homepage}}</a></p>
+ {% if page.extra.live_demo%}
+ <p><b>Live Demo:</b> <a href="{{page.extra.live_demo}}">{{page.extra.live_demo}}</a></p>
+ {% endif %}
<p><b>Last updated:</b> {{page.extra.updated }}</p>
</div>
</div>
