Added "forced" commands. Example: (do*!). FEATURE.

FEATURE: you can now suffix any command with (!) to skip the confirmation
queries associated with the command.

Force a command when you are familiar with the command and you don't want to
bother with confirmation.

Example: you can open a bunch of __metadata__.py files with (mdo*). In the
usual case the IDE will confirm that you want to open multiple files and you
have to confirm with (y):

    Abjad IDE - scores [examples]

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

          scores - copy (cp)
          scores - new (new)
          scores - remove (rm)
          scores - rename (ren)

    > mdo*
    Will open ...
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/blue_example_score/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/blue_example_score/materials/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/blue_example_score/materials/sargasso_measures/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/blue_example_score/segments/segment_01/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/blue_example_score/segments/segment_02/__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/build/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/distribution/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/makers/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/instrumentation/__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/time_signatures/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/segments/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/segments/segment_01/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/segments/segment_02/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/segments/segment_03/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/stylesheets/__metadata__.py
    Ok? y
    21 files to edit

    >

Example: but if you use (mdo*!) then you can just open the files immediately
without worrying about confirmation:

    Abjad IDE - scores [examples]

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

          scores - copy (cp)
          scores - new (new)
          scores - remove (rm)
          scores - rename (ren)

    > mdo*!
    Will open ...
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/blue_example_score/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/blue_example_score/materials/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/blue_example_score/materials/sargasso_measures/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/blue_example_score/segments/segment_01/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/blue_example_score/segments/segment_02/__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/build/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/distribution/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/makers/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/instrumentation/__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/time_signatures/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/segments/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/segments/segment_01/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/segments/segment_02/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/segments/segment_03/__metadata__.py
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/stylesheets/__metadata__.py
    21 files to edit

    >