Added new 'all directories - metadata module - list (mdmls)' command.

Description: use (mdmls) to list *ALL* metadata modules everywhere.

Availability: call (mdmls) from the score manager main menu only. You can see
(mdmrw) and (mdmls) here:

    Score manager - example scores

        1: Blue Example Score (2013)
        2: Étude Example Score (2013)
        3: Red Example Score (2013)

        scores - new (new)

    > ?

    Score manager - example scores - commands

        all directories - metadata module - list (mdmls)
        all directories - metadata module - rewrite (mdmrw)

        cache - view (cv)
        cache - write (cw)

        library - manage materials (lmm)
        library - manage stylesheets (lmy)

        LilyPond - view log (lvl)

        Python - doctest (pyd)
        Python - interact (pyi)
        Python - test (pyt)

        repository - add (rad)
        repository - commit (rci)
        repository - revert (rrv)
        repository - status (rst)
        repository - update (rup)

        scores - new (new)

        scores - show active (ssv)
        scores - show all (ssl)
        scores - show examples (ssx)
        scores - show mothballed (ssmb)
        scores - show user (ssu)

        scores - tour next (stn)
        scores - tour previous (stp)

        source code - edit (sce)
        source code - location (scl)

    > q

Example:

    > mdmls

    /Users/trevorbaca/Documents/abjad/scoremanager/materials/example_articulation_handler/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/materials/example_dynamic_handler/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/materials/example_markup_inventory/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/materials/example_notes/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/materials/example_numbers/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/materials/example_pitch_range_inventory/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/materials/example_sargasso_measures/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/materials/example_articulation_handler/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/materials/example_dynamic_handler/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/materials/example_markup_inventory/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/materials/example_notes/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/materials/example_numbers/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/materials/example_pitch_range_inventory/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/materials/example_sargasso_measures/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/blue_example_score/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/etude_example_score/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/blue_example_score/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/etude_example_score/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/segments/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/magic_numbers/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/pitch_range_inventory/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/tempo_inventory/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/magic_numbers/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/pitch_range_inventory/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/tempo_inventory/__metadata__.py
    /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/segments/__metadata__.py
    /Users/trevorbaca/Documents/baca/score_manager_library/material_packages/baca_numbers/__metadata__.py
    /Users/trevorbaca/Documents/baca/score_manager_library/material_packages/baca_numbers/__metadata__.py
    /Users/trevorbaca/Documents/scores/aracilik/__metadata__.py
    /Users/trevorbaca/Documents/scores/archipel/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/__metadata__.py
    /Users/trevorbaca/Documents/scores/cary/__metadata__.py
    /Users/trevorbaca/Documents/scores/chrysanthemums/__metadata__.py
    /Users/trevorbaca/Documents/scores/desir/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/__metadata__.py
    /Users/trevorbaca/Documents/scores/imaginaire/__metadata__.py
    /Users/trevorbaca/Documents/scores/jivan/__metadata__.py
    /Users/trevorbaca/Documents/scores/lidercfeny/__metadata__.py
    /Users/trevorbaca/Documents/scores/mannigfaltigkeiten/__metadata__.py
    /Users/trevorbaca/Documents/scores/manos/__metadata__.py
    /Users/trevorbaca/Documents/scores/recursif/__metadata__.py
    /Users/trevorbaca/Documents/scores/red_shift/__metadata__.py
    /Users/trevorbaca/Documents/scores/sekka/__metadata__.py
    /Users/trevorbaca/Documents/scores/tack/__metadata__.py
    /Users/trevorbaca/Documents/scores/territoires/__metadata__.py
    /Users/trevorbaca/Documents/scores/traiettorie/__metadata__.py
    /Users/trevorbaca/Documents/scores/zeit/__metadata__.py
    /Users/trevorbaca/Documents/scores/aracilik/__metadata__.py
    /Users/trevorbaca/Documents/scores/archipel/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/segments/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/aggregates/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/indigo_pitch_classes/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/range_inventory/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/reiterated_forte/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/speckled_rhythm_maker/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/tempo_inventory/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/time_signature_pairs/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/violet_pitch_classes/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/aggregates/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/indigo_pitch_classes/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/range_inventory/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/reiterated_forte/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/speckled_rhythm_maker/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/tempo_inventory/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/time_signature_pairs/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/materials/violet_pitch_classes/__metadata__.py
    /Users/trevorbaca/Documents/scores/betoerung/segments/__metadata__.py
    /Users/trevorbaca/Documents/scores/cary/__metadata__.py
    /Users/trevorbaca/Documents/scores/chrysanthemums/__metadata__.py
    /Users/trevorbaca/Documents/scores/desir/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/cobalt_divisions/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/end_incised_double_valued_note_maker/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/end_incised_note_maker/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/fused_cobalt_time_signatures/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/fused_yellow_time_signatures/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/pitch_classes/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/split_cobalt_time_signatures/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/split_yellow_time_signatures/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/tempo_inventory/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/time_signature_pairs/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/tratti_del_arco/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/yellow_divisions/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/cobalt_divisions/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/end_incised_double_valued_note_maker/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/end_incised_note_maker/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/fused_cobalt_time_signatures/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/fused_yellow_time_signatures/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/pitch_classes/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/split_cobalt_time_signatures/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/split_yellow_time_signatures/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/tempo_inventory/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/time_signature_pairs/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/tratti_del_arco/__metadata__.py
    /Users/trevorbaca/Documents/scores/gebiete/materials/yellow_divisions/__metadata__.py
    /Users/trevorbaca/Documents/scores/imaginaire/__metadata__.py
    /Users/trevorbaca/Documents/scores/jivan/__metadata__.py
    /Users/trevorbaca/Documents/scores/lidercfeny/__metadata__.py
    /Users/trevorbaca/Documents/scores/mannigfaltigkeiten/__metadata__.py
    /Users/trevorbaca/Documents/scores/manos/__metadata__.py
    /Users/trevorbaca/Documents/scores/manos/materials/aggregates/__metadata__.py
    /Users/trevorbaca/Documents/scores/manos/materials/black_pcs/__metadata__.py
    /Users/trevorbaca/Documents/scores/manos/materials/turquoise_pcs/__metadata__.py
    /Users/trevorbaca/Documents/scores/manos/materials/aggregates/__metadata__.py
    /Users/trevorbaca/Documents/scores/manos/materials/black_pcs/__metadata__.py
    /Users/trevorbaca/Documents/scores/manos/materials/turquoise_pcs/__metadata__.py
    /Users/trevorbaca/Documents/scores/recursif/__metadata__.py
    /Users/trevorbaca/Documents/scores/red_shift/__metadata__.py
    /Users/trevorbaca/Documents/scores/sekka/__metadata__.py
    /Users/trevorbaca/Documents/scores/tack/__metadata__.py
    /Users/trevorbaca/Documents/scores/territoires/__metadata__.py
    /Users/trevorbaca/Documents/scores/traiettorie/__metadata__.py
    /Users/trevorbaca/Documents/scores/traiettorie/materials/__metadata__.py
    /Users/trevorbaca/Documents/scores/traiettorie/segments/__metadata__.py
    /Users/trevorbaca/Documents/scores/traiettorie/materials/__metadata__.py
    /Users/trevorbaca/Documents/scores/traiettorie/materials/pitch_classes/__metadata__.py
    /Users/trevorbaca/Documents/scores/traiettorie/materials/tempo_inventory/__metadata__.py
    /Users/trevorbaca/Documents/scores/traiettorie/materials/tuplet_cell_treatments/__metadata__.py
    /Users/trevorbaca/Documents/scores/traiettorie/materials/white_flautando_spanner/__metadata__.py
    /Users/trevorbaca/Documents/scores/traiettorie/materials/pitch_classes/__metadata__.py
    /Users/trevorbaca/Documents/scores/traiettorie/materials/tempo_inventory/__metadata__.py
    /Users/trevorbaca/Documents/scores/traiettorie/materials/tuplet_cell_treatments/__metadata__.py
    /Users/trevorbaca/Documents/scores/traiettorie/materials/white_flautando_spanner/__metadata__.py
    /Users/trevorbaca/Documents/scores/traiettorie/segments/__metadata__.py
    /Users/trevorbaca/Documents/scores/zeit/__metadata__.py

    132 metadata modules found.

The command provides a relatively powerful way to inventory all metdata modules
at one time.