Fixed getNoiseMatrix.m for squeezer to give correct answer when the
OPO is lossless.  Updated optSagnac.m now that this has been fixed.
Merge remote-tracking branch 'origin/Optickle2-eric' into Optickle2-m3v4n5
some clean-up in Squeezer
Merge branch 'Optickle2-m3v4n5' into Optickle2