Added code to parse a calibration file

Added code to parse a calibration file to aid in automation.  Added
example csv file.
ok
Added time index

Changed time scale to reflect actual time in seconds
Changed calib format, parsed x2 data

Updated calibration file to include calibration data for square-law
detector.  Added code to read x2 CSV file and plot.  Need to add filter
for x2 and add calibration data.
wtf

Not sure why this file keeps popping AFTER I do a commit.