DOC: update documentation.

Add documentation covering:
  - developer information about architecture
  - project structure and building
  - project overview and service descriptions
  - the portability model for supporting hardware

Signed-off-by: Julian Hall <julian.hall@arm.com>
Co-Authored-By: Gyorgy Szing <gyorgy.szing@gmail.com>
Change-Id: I8bf9c01a66350719d82a7ca2bc1c78a8ab17978d
diff --git a/docs/conf.py b/docs/conf.py
index f9ccb6f..e35a28e 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 
 # -- Metadata about this file ------------------------------------------------
-__copyright__ = "Copyright (c) 2020 Arm Limited"
+__copyright__ = "Copyright (c) 2020-2021 Arm Limited and Contributors."
 __license__ = "SPDX-License-Identifier: BSD-3-Clause"
 
 # Configuration file for the Sphinx documentation builder.
@@ -102,8 +102,7 @@
 # -- Options for plantuml ----------------------------------------------------
 
 plantuml_output_format = 'svg_img'
-
 # -- Options for todo extension ----------------------------------------------
 
 # Display todos
-todo_include_todos = True
+todo_include_todos = False