Add documentation skeleton.

Add licensing information and minimal documentation.

Change-Id: I5dea9192634980eda0e3518b1bff7cea85a9ab91
Signed-off-by: Gyorgy Szing <gyorgy.szing@arm.com>
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..1b7d714
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,8 @@
+#
+# Copyright (c) 2020, Arm Limited and Contributors. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+# Include packages needed for socument generation
+-r docs/requirements.txt
\ No newline at end of file