Initial Defense4All Developer's Guide Content

This is Shahida's work submitted by Mathieu and gotten to the point that
they build by Colin Dixon.

Change-Id: I90418fff60412a07bfa4b72fdc6be47224cce945
Signed-off-by: Mathieu Lemay <mlemay@inocybe.com>
Signed-off-by: Colin Dixon <colin@colindixon.com>