Changed title of Workstation Setup to Training and Workbench Setup

Signed-off-by: Conrad Gomes <conrad.s.j.gomes@gmail.com>
Added subsections for Hardware and Softwre

Signed-off-by: Conrad Gomes <conrad.s.j.gomes@gmail.com>
Updated awestruct and asciidoctor versions

Signed-off-by: Conrad Gomes <conrad.s.j.gomes@gmail.com>
Saving work done to check relative path imagesdir. Refer to http://discuss.asciidoctor.org/setting-imagesdir-for-asciidoc-articles-baked-with-awestruct-td528.html

Signed-off-by: Conrad Gomes <conrad.s.j.gomes@gmail.com>
Changing imagesdir to images. This will be used if awestruct is not used. We will save all images in both the topdir and in this directory for reference in case we want to use this folder as a stand alone document

Signed-off-by: Conrad Gomes <conrad.s.j.gomes@gmail.com>
Added section on BeagleBone Black hardware. Adding images to topdir so that it can be referenced correctly bby awestruct

Signed-off-by: Conrad Gomes <conrad.s.j.gomes@gmail.com>