add karma graphs view to the django site

pretty simplistic for the moment, it will become more robust later (TM)

dr_botzo/templates/base.html

@@ -72,6 +72,7 @@
         </div>
         {% block navbar_menu %}
           <ul class="nav navbar-nav">
+            <li><a href="{% url 'karma_index' %}">Karma</a></li>
             <li><a href="{% url 'markov_index' %}">Markov</a></li>
             <li><a href="{% url 'races_index' %}">Races</a></li>
           </ul>