Update classes

doc/_templates/layout.html

@@ -71,11 +71,11 @@
         </div> {# /.navbar-collapse #}
       </div> {# /.col-md-offset-2 #}
     </div> {# /.row #}
-  </div> {# /.container #}
+  </div> {# /.tb-container #}
 </nav>
 {% if pagename == "index" %}
 <div class="jumbotron">
-  <div class="container">
+  <div class="tb-container">
     <h1>C++ Format</h1>
     <p class="lead">Small, safe and fast formatting library for C++</p>
     <div class="btn-group" role="group">
@@ -102,7 +102,7 @@
 {% endblock %}
 
 {% block content %}
-<div class="container">
+<div class="tb-container">
   <div class="row">
     {# TODO: integrate sidebar
     <div class="bs-sidebar">