{% include "_includes/facebook_like.html" %}
{% include "_includes/google_plus_one.html" %}
{% include "_includes/twitter_sharing.html" %}
{% if site.mathjax %}
{% endif %}
{% if site.google_analytics_tracking_id %}
{% endif %}
{% if site.clicky_tracking_id %}
{% endif %}
{% if site.woopra_tracking_site %}
{% endif %}