Additional comments & spellcheck for the README file

Change-Id: I47343143146aebafff769f3b244265747807f815
Signed-off-by: Jan Medved <jmedved@cisco.com>
(cherry picked from commit 28096b4d91e3830f84617601af23fbbd2ce45122)

Change-Id: I6783e230621914e755f6bc23201371e5306a1b04
Signed-off-by: Luis Gomez <ecelgp@gmail.com>