- the transition to python-ligo-lw is now complete, with that package being
  in production and installed LDG-wide

- this patch removes ligolw_add, ligolw_cut, ligolw_print, ligolw_sqlite from
  bin/ in the glue source tree, and eliminates the "glue-ligolw-tools"
  sub-package from the packaging scripts

- test scripts used for verifying the four tools are also removed