gstlal_compute_strain:  Added option --cancel-callines to remove calibration lines in the pipeline. Also added progress reports to kappa channels before muxer.
lal_demodulate:  bug fix for negative frequencies. Also added complex prefactor to multiply inputs.

gstlal_compute_strain:  Added DARM line coherence gating to kappa_tst calculation.

- Multiplies incoming real float stream by exp(i*2*pi*line_frequency*t), where line_frequency is a property to set to a calibration line frequency. This allows for the extraction of the calibration factors, "kappa's".

- Included lal_constantupsample_test.py for testing, updated test_common.py in gstlal-calibration to match what is in gstlal.

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