Revamp the CI to use gitlab-ci-templates

See merge request lscsoft/glue!72

Deprecate glue.ligolw

See merge request lscsoft/glue!71

to formally warn users to migrate to python-ligo-lw

Update RPM package names

See merge request lscsoft/glue!67

Added misc/git_version.py.in to manifest

Closes #18

See merge request lscsoft/glue!63

so that it gets included in distributions
fixes #18

Added CI to auto-build sphinx docs

See merge request lscsoft/glue!61

Removed src/segments* from manifest

See merge request lscsoft/glue!56

Updated README

Closes #9

See merge request lscsoft/glue!52

Removed gw_data_find

See merge request lscsoft/glue!57

Updated CI

See merge request lscsoft/glue!60

- use new macro for python3 version
- added missing `gcc` and `make` dependencies

and tweaked binary package building

- use markdown formatting
- just provide installation instructions and link to website

causes issues with bdist_egg installs

Removestubs

See merge request lscsoft/glue!59

- I don't hvae a test environment to confirm that this patch is correct,
  someone who can reproduce the problem will have to check

- obsolete stub, original now in gstlal

- obsolete stub, moved to lalburst

- a few last places that refer to glue.segments and glue.segmentsUtils are updated
- the subpackage is removed from the packaging scripts

- re-enable unit tests for table, lsctables and utils.segments

- test environment in git.ligo.org is incomplete

- glue's test environment on git.ligo.org is incomplete