Convert scripts to entry_points

This MR converts all of the scripts previously managed in bin/ into entry points constructed from code now managed as modules in the new dqsegdb.tools subpackage.

Using entry points rather than scripts has a few advantages

• much easier to test functions in the code independently of the whole
• much easier to measure coverage
• entry points are more portable (easier to install on non-Unix platforms, for example)
• allows for a noarch: python conda package (niche benefit)

This should have no impact on the functionality or usability of any of the current scripts.

debian/control

@@ -6,11 +6,6 @@ Build-Depends:
  debhelper (>= 9),
  dh-python,
  python3-all,
- python3-gwdatafind,
- python3-ligo-segments,
- python3-lscsoft-glue (>= 3.0.1),
- python3-pyrxp,
- python3-pytest,
  python3-setuptools,
 Standards-Version: 3.9.1
 X-Python-Version: >= 3.6
@@ -20,6 +15,7 @@ Architecture: any
 Depends:
  ${misc:Depends},
  ${python3:Depends},
+ python3-gpstime,
  python3-gwdatafind,
  python3-lal,
  python3-ligo-segments,