Integrated IncisionSpecifier into IncisedRhythmMaker.

Old:
Streamlined IncisedRhythmMaker initializer.

Old:

    maker = rhythmmakertools.IncisedRhythmMaker(
        prefix_talea=(-8,),
        prefix_lengths=(0, 1),
        suffix_talea=(-1,),
        suffix_lengths=(1,),
        talea_denominator=32,
        fill_with_notes=True,
        incise_divisions=True,
        )

New:

    incision_specifier = rhythmmakertools.IncisionSpecifier(
        prefix_talea=(-8,),
        prefix_lengths=(0, 1),
        suffix_talea=(-1,),
        suffix_lengths=(1,),
        talea_denominator=32,
        )

    maker = rhythmmakertools.IncisedRhythmMaker(
        incision_specifier=incision_specifier,
        fill_with_notes=True,
        incise_divisions=True,
        )