Agregar botones para compartir en redes sociales

<div class="pw-widget pw-counter-vertical">
    <a class="pw-button-facebook pw-look-native"></a>
    <a class="pw-button-twitter pw-look-native"></a>
    <a class="pw-button-googleplus pw-look-native"></a>
    <a class="pw-button-post-share"></a>
</div>
<script src="http://i.po.st/static/v3/post-widget.js#publisherKey=qj3ppdkrargeems1v4sj&retina=true" type="text/javascript"></script>