add a table of contents

Add a table of contents help readers find the information they need
without having to read all of the prose on every page. Remove the
site-map file, which doesn't appear to be linked anywhere.

Change-Id: Ib5761c9cfdd5a083df562413d727cb4ac7547c9e
Signed-off-by: Doug Hellmann <doug@doughellmann.com>
diff --git a/doc/source/index.rst b/doc/source/index.rst
index cbd6971..47087c5 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -142,3 +142,12 @@
 Get :doc:`the big picture <overview>` of what we are trying to do
 with devstack, and help us by :doc:`contributing to the project
 <hacking>`.
+
+Contents
+--------
+
+.. toctree::
+   :glob:
+   :maxdepth: 2
+
+   *