FAB-9705 add digest paper as introduction

Change-Id: I763ede8583834fc419303c0989d4bfe79801bee5
Signed-off-by: Christopher Ferris <chrisfer@us.ibm.com>

Author: christo4ferris

docs/source/index.rst

@@ -1,41 +1,21 @@
-Welcome
-=======
+A Blockchain Platform for the Enterprise
+========================================
 
 .. image:: images/hyperledger_fabric_logo_color.png
 
-
-Hyperledger Fabric is a platform for distributed ledger solutions, underpinned
-by a modular architecture delivering high degrees of confidentiality, resiliency,
-flexibility and scalability.  It is designed to support pluggable implementations
-of different components, and accommodate the complexity and intricacies that exist
-across the economic ecosystem.
-
-Hyperledger Fabric delivers a uniquely elastic and extensible architecture,
-distinguishing it from alternative blockchain solutions. Planning for the
-future of enterprise blockchain requires building on top of a fully-vetted,
-open source architecture; Hyperledger Fabric is your starting point.
-
-It's recommended for first-time users to begin by going through the
-:doc:`getting_started` section in order to gain familiarity with the Hyperledger Fabric
-components and the basic transaction flow.  Once comfortable, continue
-exploring the library for demos, technical specifications, APIs, etc.
-
-.. note:: If you have questions not addressed by this documentation, or run into
-          issues with any of the tutorials, please visit the :doc:`questions`
-          page for some tips on where to find additional help.
-
-Before diving in, watch how Hyperledger Fabric is Building a Blockchain for
-Business:
+Enterprise grade permissioned distributed ledger platform that offers
+modularity and versatility for a broad set of industry use cases.
 
 .. raw:: html
 
+   <br/><br/>
    <iframe width="560" height="315" src="https://www.youtube.com/embed/EKa5Gh9whgU" frameborder="0" allowfullscreen></iframe>
    <br/><br/>
 
 .. toctree::
    :maxdepth: 1
-   :caption: Table of Contents
 
+   whatis
    getting_started
    key_concepts
    tutorials
@@ -50,5 +30,9 @@ Business:
    questions
    status
 
+.. note:: If you have questions not addressed by this documentation, or run into
+          issues with any of the tutorials, please visit the :doc:`questions`
+          page for some tips on where to find additional help.
+
 .. Licensed under Creative Commons Attribution 4.0 International License
    https://creativecommons.org/licenses/by/4.0/