Renaming and reordering examples

examples/injection_examples/basic_tutorial.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/injection_examples/time_domain_source_model.py

examples/make_standard_data.py

examples/open_data_examples/GW150914.py

examples/other_examples/get_LOSC_event_data.py

examples/standard_data.txt

examples/tutorials/compare_samplers.ipynb