Fix previous and next links

docs_theme/nav.html

@@ -2,8 +2,12 @@
       <div class="navbar-inner">
         <div class="container-fluid">
           <a class="repo-link btn btn-primary btn-small" href="https://github.com/tomchristie/django-rest-framework/tree/master">GitHub</a>
-          <a class="repo-link btn btn-inverse btn-small " href="tutorial/quickstart">Next <i class="icon-arrow-right icon-white"></i></a>
-          <a class="repo-link btn btn-inverse btn-small disabled" href="#"><i class="icon-arrow-left icon-white"></i> Previous</a>
+          <a class="repo-link btn btn-inverse btn-small" rel="prev" {% if next_page %}href="{{ next_page.url }}"{% endif %}>
+            Next <i class="icon-arrow-right icon-white"></i>
+          </a>
+          <a class="repo-link btn btn-inverse btn-small" rel="next" {% if previous_page %}href="{{ previous_page.url }}"{% endif %}>
+            <i class="icon-arrow-left icon-white"></i> Previous
+          </a>
           <a class="repo-link btn btn-inverse btn-small" href="#searchModal" data-toggle="modal"><i class="icon-search icon-white"></i> Search</a>
           <a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
             <span class="icon-bar"></span>