added authors list template

bellapanghulan_reading/bookshelf/templates/bookshelf/authors.html

@@ -13,7 +13,7 @@
             <ul>
                 {% for object in object_list %}
                 <li>
-                    <a href="{{ object.get_absolute_url }}">{{ object.first_name }} {{ object.last_name }}</a>
+                    <a href="{{ object.get_absolute_url }}">{{ object }}</a>
                 </li>
                 {% endfor %}
             </ul>