Skip git_submodules step in source distribution packages.
Changelog and dxR version update for v0.55.1
Use github link that allows anonymous clone access.
Changelog and dxR version update for v0.55.2
Add fallback to os.gettpid() when psutil is not available
Changelog and dxR version update for v0.55.3
add test_requirements.txt to MANIFEST.in
Unversion distribute dependency

Conflicts:

	src/python/requirements.txt

Conflicts:

	src/python/requirements.txt
Install all executables into $DESTDIR/$PREFIX/bin.

The list of executables that were previously excluded:
activate-global-python-argcomplete, jq,
python-argcomplete-check-easy-install-script,
register-python-argcomplete.
Changelog and dxR version update for v0.55.4