Issue/374/introspection (#381)

* added stages/__init__.py for introspection functions

* added os.path.expandvars to data

* updated stages/__init__.py

* tweek docstrings in src/rail/creation/degradation/observing_condition_degrader.py to avoid issues with sphinx

* fix up gitignore

* updated unit tests for rail.stages

* fix up coverages

* fix up stages

* updated introspection stuff

* added src/rail/core/introspection.py

attempt to build a release for pypi (#363)

* attempt to build a release for pypi

* untab

Merge pull request #354 from LSSTDESC/issue/41/rando

Addressing the last few remaining places where randoms aren't using default_rng and/or a configurable seed

Merge pull request #251 from LSSTDESC/fix_version

fix version

Merge pull request #250 from LSSTDESC/issue/238/reorganize

Issue/238/reorganize

Merge pull request #201 from LSSTDESC/issue/189/renaming-in-creation

Issue/189/renaming in creation (adding Modeler class)

Added dummy file to examples/estimation/data/AB to make sure directoy…

… gets created

switch to temp versions of qp and hyperbolic

move qp to core_extras until it is on pypi

fix setup.py for twine