Add "ToC" to "index.rst" file.
@@ -10,6 +10,12 @@ It is open source and freely available under the
.. image:: https://raw.githubusercontent.com/colour-science/colour-branding/master/images/Colour_Logo_Medium_Tight_001.png
+.. contents:: **Table of Contents**
+ :backlinks: none
+ :depth: 3
+
+.. sectnum::
+
Draft Release Notes
-------------------
