Richard Neill authored May 18, 2021 and Diego Sueiro committed Jun 21, 2021

This patch updates the existing documentation (quickstart guide, CI build
script), and adds additional documentation relating to the configuration of
DISTRO_FEATURES for EWAOL image builds, kas build config YAML files, and the
runtime validation tests.

Issue-Id: SCM-2358
Signed-off-by: Richard Neill <richard.neill@arm.com>
Signed-off-by: Diego Sueiro <diego.sueiro@arm.com>
Change-Id: I1d96dc94a346eb60416011d0ceb2d07a87eeed9c