Merge branch 'master' into Resolve-266

.gitlab-ci.yml

CHANGELOG.md

MANIFEST.in

bilby/core/result.py

bilby/core/sampler/__init__.py

bilby/core/sampler/base_sampler.py

bilby/core/sampler/emcee.py

bilby/core/sampler/ptemcee.py

bilby/core/sampler/ptmcmc.py

bilby/core/sampler/pymc3.py

bilby/core/sampler/pymultinest.py

bilby/gw/__init__.py

bilby/gw/detector.py

bilby/gw/likelihood.py

bilby/gw/result.py

bilby/gw/source.py

bilby/gw/utils.py

containers/Dockerfile-test-suite-python27

containers/Dockerfile-test-suite-python37

containers/Singularity.0.3.3