- lal-python --> python-lal
- lalinspiral-python --> python-lalinspiral

- use `Requires.private` in pkgconfig files to stop forcing downstream
  packages to link against everything upstream
- added `pkgconfig` as `BuildRequires` for RPMs
- bumped required version of pkg-config to 0.18.0

Packaging updates for gstlal-inspiral-1.6.1. Note: configure gstlal-inspiral with --disable-massmodel to prevent the 1.1GB file from being distributed with 'make dist'.

- update gsl dependencies for Debian following input from Steffen.

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

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

- switch from glue-segments to ligo-segments package

- can rely on gracedb module import to work

- from /usr/lib in Debian packages

- gstlal --> 1.2.1
- gstlal-ugly --> 1.3.1
- gstlal-inspiral --> 1.4.1

- fix install paths for python modules in debian packaging scripts

- new version 9 packaging standard places libs into a versioned subdir

- don't know why, but I was asked to do this for another package and
  thought I might as well do it here while I'm at it.

- ER10 release

- the gsl packages have been renamed in newer Debians

- more alphabetization of dependency lists
- add missing gir1.2-glib-2.0
- add other missing deps to gstlal-calibration
- remove libxml2 dependency (why was this added?)

- the buliding and packaging of the GIR files isn't working, this might fix it.

- alphabetize (more or less) the dependencies and remove some redundant/fake ones