FEATURE: Relative Binning in bilby

AUTHORS.md

bilby/gw/conversion.py

bilby/gw/detector/interferometer.py

bilby/gw/likelihood/__init__.py

bilby/gw/likelihood/base.py

bilby/gw/likelihood/relative.py

bilby/gw/source.py

examples/gw_examples/data_examples/GW190425.py

examples/gw_examples/injection_examples/relative_binning.py

test/gw/likelihood/relative_binning_test.py

test/gw/likelihood_test.py

test/gw/source_test.py