Extended scoretools.make_leaves() with is_diminution=True keyword. NEW.

The is_diminution=True keyword controls whether the function produces diminshed
(default) or augmented tuplets. (The function produces tuplets in response to
non-power-of-two input durations.)

See examples 13 and 14 in the API.
Merged master.
Taught RestRhythmMaker about tuplet spelling specifier.

See the API entry for examples.