Add logging functions: error, warn, info, and success, using tput to add
color highlighting.
Use these routines throughout the script, replacing echo statements and
adding "|| error" in several places to eliminate silent failures. Add a
simple exit block which checks for issues encountered while running.
Signed-off-by: Darren Hart <dvhart@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
