gwastro/ml-mock-data-challenge-1: MLGWSC-1 Release v1.2

This is the v1.2 release of the MLGWSC-1. IMPORTANT: The PyCBC installation should be updated. To do so run pip install -e git+https://github.com/gwastro/pycbc.git@efeaeb60296e15d842368d4cc9fe038b4b07ebcf#egg=pycbc Major changes: There was a bug that could cause the same noise to be generated in both detectors for data sets 1-3. This was especially the case for data set 1. This bug was fixed. There was a bug where some injections were overlapping. This issue is fixed by updating the PyCBC version as detailed above. There was a bug where the sample rate of generated data was not exactly 2048 Hz. We introduced a workaround for this issue. Minor changes: A memory leak was closed. A license was added to the repository. Citation guidelines were added to the repository. Fixed examples failing for certain durations of test data. Added a plotting script to visualize the output of evaluate.py to the contributions folder