title: django-postman extends a base.html that does not exist
body: <p>I have installed and configured <code>django-postman</code> based on <a href="https://django-postman.readthedocs.org/en/latest/" rel="nofollow noreferrer">documentation</a>:</p>
  
  <p>in <code>urls.py</code> in root of my project:</p>
  
  <pre><code>(r'^messages/', include('postman.urls')),
  </code></pre>
  
  <p>in settings.py:</p>
  
  <pre><code>INSTALLED_APPS = (
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.sites',
      'django.contrib.messages',
      'django.contrib.staticfiles',
      'grappelli',
      'filebrowser',
      'django.contrib.admin',
      'south',
      'postman',
      'MeetingManagerHub',
      'PersonHub',
      'TaskManagerHub',
      'AgencyHub',
      'DrHub',
      'CompanyHub',
      'AdvHub',
      'CarHub',
      'django.contrib.comments',
      'easy_maps',
      'MagazineHub',
      'captcha',
      'pagination'
  )
  </code></pre>
  
  <p>so I enter the address: <code>http://127.0.0.1:8081/messages/inbox/</code>
  but when I click on links none of them works!I just see this page!
  <img src="https://i.stack.imgur.com/CjrzC.png" alt="enter image description here">
  <strong>update</strong> :</p>
  
  <p>I created an man_base.html file with this content:</p>
  
  <pre><code>&lt;html&gt;
  &lt;head&gt;
  &lt;title&gt;{% block title %}{% endblock %}&lt;/title&gt;
  {% block extrahead %}{% endblock %}
  &lt;/head&gt;
  &lt;body&gt;
  {% block postman_menu %}{% endblock %}
  {% block content %}{% endblock %}
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>and added this line to the start of <code>base.html</code> file:</p>
  
  <pre><code>{% extends "postman/main_base.html" %}
  </code></pre>
  
  <p>and It worked!</p>