Merge sections in docs frontpage

Signed-off-by: martin f. krafft <madduck@madduck.net>
diff --git a/doc/source/index.rst b/doc/source/index.rst
index a5bb5ff..43417b9 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -3,13 +3,11 @@
 ================================================
 .. include:: intro.inc
 
-Releases
---------
+Releases and source code
+------------------------
 The latest released |reclass| version is |release|. Please have a look at the
 :doc:`change log <changelog>` for information about recent changes.
 
-Source code
------------
 For now, |reclass| is hosted `on Github`_, and you may clone it with the
 following command::