Python extension library that utilizes music21 to search for subjects/themes
Installing music21: https://docs.google.com/a/haverford.edu/document/d/1E9zBdgutZGVnPRsCtS1DMqhvWVQSkoAWbI8bHGrWvgU/edit
Documentation for MusicSearch: https://docs.google.com/document/d/1EcNWUnEG5yZpOAYLJaLyhtbZu_MAl_N2TeW43ioDYHk/edit?usp=sharing