cleanup, read-in CSVs, methods

recognizeFunctionalChordSymbol() function, no more embedded T-S-D
matrices, entry and exit matrices made faster
custom Progressions because why not; now uses Chord class...
Preliminary tonicization support

forms like V/vi-vi work, and are displayed correctly, added
tonicization[] to keep track, updated CSVs to have some examples
more paths for T and P

added V/vi and vi uses, added V42/IV-IV
Cleanup, Update Readme

renaming, removing commented out code