Add a license section to the docs toc

doc/en/_templates/globaltoc.html

@@ -9,6 +9,7 @@
   <li><a href="{{ pathto('contact') }}">Contact</a></li>
   <li><a href="{{ pathto('talks') }}">Talks/Posts</a></li>
   <li><a href="{{ pathto('changelog') }}">Changelog</a></li>
+  <li><a href="{{ pathto('license') }}">License</a></li>
 </ul>
 
 {%- if display_toc %}

doc/en/license.rst

@@ -0,0 +1,8 @@
+License
+-------
+
+Copyright Holger Krekel and others, 2004-2016.
+
+Distributed under the terms of the `MIT`_ license, pytest is free and open source software.
+
+.. _`MIT`: https://github.com/pytest-dev/pytest/blob/master/LICENSE