Added support to the wdhwdaemon client to set the LCD text and brightness.
# set text
python3 -m wdhwdaemon.client lcd -t 'text for line1\n... and line2'
# set brightness
python3 -m wdhwdaemon.client lcd -s 255
# get brightness
python3 -m wdhwdaemon.client lcd -g
Added support to the wdhwdaemon client to set the LCD text and brightness.