- this version does not yet exist, but will have to exist because we need
  the .template_id attribute of the SnglInspiral object.
- also, the migration of ligolw_segments from pylal to glue borked the
  packaging and the problem went resolved, now the only solution will
  require a re-release of glue.
- so ... we require 1.59.3 even though it doesn't exist

- this is a lie, we require 3.28, but it's not available and we can limp
  along with work-arounds until it is.  3.14 is what's in the current
  Debian LDG reference OS, so that's what we'll say we need.

- replace dependency on glue-ligolw-tools with python-ligo-lw now that the
  latter is in production

gstlal_inspiral_pipe: add svd files to the create prior dist stats and fix some remaining ilwdchar compats

lines from header file. Added logic using a local copy of struct
gstlal_peak_state with includes a new boolean called no_peaks_past_threshold,
meant to be a temporary hack to inform python layer of times when a trigger
could exist for an IFO but none do

- teach configure scripts to check the version number of glue and
  ligo-segments, not just that they are installed.  the checks only produce
  warnings at this time.

- add explicit dependence on the python-glue-ligolw-tools package

- switch from glue-segments to ligo-segments package

- elements must be installed using python3, but rest of this package
  requires python2 so we can't switch configure.ac over to it yet.  put a
  temporary hack into the gst/python/Makefile.am script to make it use the
  python3 interpreter during module install and byte-compile

gstlal-calibration/tests/check_calibration:  Added GPS start time to name of files in pcal-to-darm plotting script.

gstlal_inspiral: set the horizon distance calculation to 15 Hz instead of 10Hz since 10hz doesn't work for SEOBNR_ROM in the bns mass region