Renderer.vexflowNotes() build tuplets incorrectly that begin with division

[vanderstel]

Renderer.vexflowNotes() calculates the length of a tuplet as the Tuplet.totalTupletLength() of the first note in the tuplet. This is a problem when the tuplet starts with a division of the note value, such as when an 8th triplet begins with 16th notes:

[mscuthbert]

yeah, this is a problem with all triplet generating software (for Finale, I basically have a muscle memory to create a [8844] tuplet by writing 4-8-8-left-left-delete(4)-right-right-4-4).

What absolutely needs to happen is to rewrite tinyNotation.TinyNotation to use a translation of the m21p Converter class, and then be able to make Converter subclasses like m21p allows.