Merge branch 'bilby-mcmc-minor-adjustments' into 'master'

bilby/bilby_mcmc/chain.py

bilby/bilby_mcmc/proposals.py

bilby/bilby_mcmc/sampler.py

bilby/core/__init__.py

bilby/core/fisher.py

bilby/core/sampler/base_sampler.py

bilby/gw/prior.py

bilby/gw/source.py

examples/core_examples/linear_regression_with_Fisher.py

test/bilby_mcmc/test_proposals.py