lal_insertgap: more informative warning message.

gstlal_compute_strain: kappa calculations: corrected how we gate with coherence uncertainty channels. Also replace zeros with default-kappa in lal_smoothkappas.

- move the legend in the event count vs ranking statistic threshold plot
  (the version with the "sigma" shaded bands) to the lower left corner so
  that it does not obscur detections

gstlal_compute_strain: Increase the settle time for filters based on the chebyshev filter used for kappa calculations (accidentally overwrote this)

gstlal-calibration: Replace tiny numbers in stream with zeros. Also use lal_smoothkappas to smooth complex kappas. Also replace zeros with ones in coherence uncertainty channels.

- not just the ones for which there are gates (i.e., also instruments that
  are in the network being analyzed but that might not be providing any
  data for this particular job)

gstlal_inspiral: allow both a reference likelihood file and a regular likelihood file in order to assign offline LRs

gstlal_ll_inspiral_create_prior_diststats: make writing a file for each bin and a cache file optional.  This way we can just write a single file for the entire offline reference