Add a changelog to documenation

Signed-off-by: martin f. krafft <madduck@madduck.net>
diff --git a/doc/source/index.rst b/doc/source/index.rst
index 1f8b51f..8441365 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -21,6 +21,7 @@
    puppet
    hacking
    todo
+   changelog
 
 Community
 ---------