Documented many class members in analysis.offsetTree.
Documented more analysis.offsetTree class members.
Added OffsetTree.fuseLikePitchedPartContiguousTimespans().
Added timespan searching methods to OffsetTree.
Added `lyric` property to offsetTree.Parentage.

The property retrieves the Parentage's element's lyric.
Improved OffsetTree.fuseLikePitchedPartContiguousTimespans().
Encapsulated ChordReducer reduction-pass logic.

ChordReducer.__call__() now takes boolean keyword arguments allowing the
toggling on and off of various reduction passes.
offsetTree.Parentage may not take a custom beat-strength.

Providing a custom beat-strength at initialization will override the
beat-strength of the element wrapped by that parentage.
Parentage.new() now support beat-strength overriding.
make nested tuplets not crash (not work, but not crash)
Added offsetTree.Verticality.nextStartOffset property.
OffsetTree classes now use figuredBass.fbPitch.HashablePitch.
Merged master.
Implemented a hocket-realignment algorithm in ChordReducer.
Added measure start/stop-offset-tracking to OffsetTree.
Improved pitch-handling in OffsetTree.
Added overlap-determination logic to OffsetTree.
Improved next/previous parentage in-same-part detection in OffsetTree.
Implemented more timespan-fusing logic in OffsetTree.
Improved hocket-reduction logic in ChordReducer.