All docs to the toctree to fix sidebar

This doesn't seem ideal, but the prior behavior was that the side bar is ONLY
usable on the index.  As soon as you click on the sub-page you can see it's name,
and nothing else.  This makes navigation painful, IMHO.

This seems like an improvements, even if not great.

Author: lowell80

docs/index.rst

@@ -3,6 +3,16 @@ For more information, see the `Splunk Developer Portal <http://dev.splunk.com/vi
 
 .. toctree::
    :maxdepth: 2
+   :name: SDK for Python API Reference
+
+   binding
+   client
+   data
+   results
+   modularinput
+   searchcommands
+   searchcommandsvalidators
+
 
 :doc:`binding`
 --------------