Mobile optimization

* adds table-responsive class to BaseClass
* adds html meta attributes for proper small device rendering

user/templates/user/index.html

@@ -4,7 +4,7 @@
 {% block body %}
     <div class="row">
         <div class="col-md-6 col-lg-4 border">
-            <table class="table">
+            <table class="table table-responsive">
                 <tr>
                     <th scope="row">{% trans 'Username' %}</th>
                     <td>{{user.username}}</td>