facebook like option

.themes/classic/source/_includes/after_footer.html

@@ -1,4 +1,5 @@
 {% include disqus.html %}
+{% include facebook_like.html %}
 {% include google_plus_one.html %}
 {% include twitter_sharing.html %}
 {% include google_analytics.html %}

.themes/classic/source/_includes/facebook_like.html

@@ -0,0 +1,8 @@
+<div id="fb-root"></div>
+<script>(function(d, s, id) {
+  var js, fjs = d.getElementsByTagName(s)[0];
+  if (d.getElementById(id)) {return;}
+  js = d.createElement(s); js.id = id;
+  js.src = "//connect.facebook.net/en_US/all.js#appId=212934732101925&xfbml=1";
+  fjs.parentNode.insertBefore(js, fjs);
+}(document, 'script', 'facebook-jssdk'));</script>

.themes/classic/source/_includes/post/sharing.html

@@ -5,4 +5,7 @@
   {% if site.google_plus_one %}
   <div class="g-plusone" data-size="{{ site.google_plus_one_size }}"></div>
   {% endif %}
+  {% if site.facebook_like %}
+    <div class="fb-like" data-send="true" data-width="450" data-show-faces="false"></div>
+  {% endif %}
 </div>

_config.yml

@@ -80,3 +80,6 @@ disqus_show_comment_count: false
 
 # Google Analytics
 google_analytics_tracking_id:
+   
+# Facebook Like
+facebook_like: true