Feature (figured bass): authentic cadences – triad form

The previous method to treat triad-to-seventh progressions has been superseded by a new method to deal with all triadic progressions, named "otherResolutionMethods()". Triadic authentic cadences (V–I or V–i) are inserted, and the previous authentic cadence method ("resolution.authenticCadence") has also been expanded to allow V triads.

Some miscellaneous variable names have also been changed for consistency.

To do: bass descending fifths to seventh chords (i.e. as part of a sequence) needs to be fitted into the authentic cadence method; inversions.