- Works with hardware with DAC control over light intensity  - new variable names in the JSON for light intensity control, control can now be set separately for each measurement set  - updated calibration to work with new DAC hardware and updated light intensities  - added power off, lights power off, battery reading, and auto-power off (after 2 minutes)  - added co2, light intensity, temp, and relh testing to the '8' testing section  - User can add background actinic light either constant value, or based on outside ambient light measured by the tcs light sensor.

Signed-off-by:  <Greg>