Add documentation skeleton.

Add licensing information and minimal documentation.

Change-Id: I5dea9192634980eda0e3518b1bff7cea85a9ab91
Signed-off-by: Gyorgy Szing <gyorgy.szing@arm.com>
diff --git a/readme.rst b/readme.rst
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+Trusted Services
+================
+
+This repository holds the Trusted Services project.
+
+The full documentation of this project is `Sphinx`_ based, lives in the *doc*
+sub-directory and is captured in reStructuredText_ format.
+
+For licensing information please refer to `license.rst`_
+
+Contributed content is accepted under the
+`Developer Certificate of Origin (DCO)`_ and commit messages shall follow
+specific formatting  rules (for details please refer to the
+*Contributing* sections of the full documentation).
+
+.. _reStructuredText: http://docutils.sourceforge.net/rst.html
+.. _Sphinx: http://www.sphinx-doc.org/en/master/
+.. _`license.rst`: docs/project/license.rst
+.. _`Developer Certificate of Origin (DCO)`: ./dco.txt
+
+--------------
+
+*Copyright (c) 2020, Arm Limited and Contributors. All rights reserved.*
+
+SPDX-License-Identifier: BSD-3-Clause