README

Change-Id: I495a4557f161290f8f99788de27958f7dc08d6f6
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/900


Tested-by: jenkins
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>