SL compensation delay always False
elliptical polarization
handle elliptical polarization
fix setMaxGap, setParkGap, Stop
can handle multiple modulators
merge delay_compensation branch: use write value of opa Wavelength attribute for compensation calculations
new xps interface
python3, handling of sequencers termination, tweak wait of post sequencer end
ported to python3, fix handling of sequencers termination
