Link to '/' instead of '../index' in prev from quickstart

tutorial/quickstart.html

@@ -43,7 +43,7 @@
         <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/1-serialization">Next <i class="icon-arrow-right icon-white"></i></a>
-            <a class="repo-link btn btn-inverse btn-small " href="../index"><i class="icon-arrow-left icon-white"></i> Previous</a>
+            <a class="repo-link btn btn-inverse btn-small " href="/"><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>