[major] upgrade to bootstrap 3
diff --git a/website/templates/pages/blog.html b/website/templates/pages/blog.html
index d7eaba4..9bd1abf 100644
--- a/website/templates/pages/blog.html
+++ b/website/templates/pages/blog.html
@@ -11,7 +11,7 @@
 {% set title="Blog" %}
 
 {% block content %}
-<div class="col col-lg-12">
+<div class="col-md-12">
 	<h2 id="blog-title">{{ blog_title }}</h2>
 	{% if blog_introduction %}
 	<p>{{ blog_introduction }}</p>