[Similarity module] Add more similarity measurements

Implement methods listed in as similarity module https://vlachosgroup.github.io/AIMSim/implemented_metrics.html. Please add detailed documentation to show which similarity functions is corresponding to which distance functions in scikit-learn or scipy.

One question I have shall we separate the similarity and distance measurements? I get confused by some measurements, e.g. Tanimoto index of molecule fingerprints. I would see it as a distance, but they treated it as a similarity, https://vlachosgroup.github.io/AIMSim/implemented_metrics.html. If we decide to distinguish them, we may need to make them into similarity and distance modules instead of one module.

@PaulWAyers @FarnazH