New propery ADD_THIS_BELOW_ARTICLE

Setting ADD_THIS_BELOW_ARTICLE will add the appropriate
Add This <div> under each article, in order to display
the sharing bar in-line.

templates/article.html

@@ -49,7 +49,11 @@
 
   {% if ADD_THIS_ID %}
   <div class="center social-share">
+    {% if ADD_THIS_BELOW_ARTICLE %}
+      <div class="addthis_inline_share_toolbox"></div>
+    {% else %}
       <p>{{ _('Like this article? Share it with your friends!') }}</p>
+    {% endif %}
     <div class="addthis_native_toolbox"></div>
     <div class="addthis_sharing_toolbox"></div>
   </div>