Rename the standard likelihood

examples/injection_examples/basic_tutorial.py

examples/injection_examples/change_sampled_parameters.py

examples/injection_examples/create_your_own_source_model.py

examples/injection_examples/how_to_specify_the_prior.py

examples/injection_examples/injection.py

examples/injection_examples/marginalized_likelihood.py

examples/open_data_examples/GW150914.py

examples/other_examples/alternative_likelihoods.py

examples/tutorials/compare_samplers.ipynb

examples/tutorials/visualising_the_results.ipynb

test/tests.py

tupak/conversion.py

tupak/likelihood.py

tupak/prior.py

tupak/result.py

tupak/sampler.py