Improved (ii*) messaging.

Example:

    Red Example Score (2013) - materials

       1: instrumentation
       2: magic numbers
       3: pitch range inventory
       4: tempo inventory
       5: time signatures

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

    > ii*
    Will interpret ...
      INPUT: /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/instrumentation/illustration.ly
     OUTPUT: /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/instrumentation/illustration.pdf

      INPUT: /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/magic_numbers/illustration.ly
     OUTPUT: /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/magic_numbers/illustration.pdf

      INPUT: /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/pitch_range_inventory/illustration.ly
     OUTPUT: /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/pitch_range_inventory/illustration.pdf

      INPUT: /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/tempo_inventory/illustration.ly
     OUTPUT: /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/tempo_inventory/illustration.pdf

      INPUT: /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/time_signatures/illustration.ly
     OUTPUT: /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/time_signatures/illustration.pdf

    Ok? y
    GNU LilyPond 2.19.8
    Processing `/Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/magic_numbers/illustration.ly'
    Parsing...
    Finding the ideal number of pages...
    Fitting music on 1 page...
    Drawing systems...
    Layout output to `/Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/magic_numbers/illustration.candiate.ps'...
    Converting to `/Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/magic_numbers/illustration.candiate.pdf'...
    Success: compilation successfully completed

    GNU LilyPond 2.19.8
    Processing `/Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/pitch_range_inventory/illustration.ly'
    Parsing...
    Interpreting music...
    Preprocessing graphical objects...
    Finding the ideal number of pages...
    Fitting music on 1 page...
    Drawing systems...
    Layout output to `/Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/pitch_range_inventory/illustration.candiate.ps'...
    Converting to `/Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/pitch_range_inventory/illustration.candiate.pdf'...
    Success: compilation successfully completed

    GNU LilyPond 2.19.8
    Processing `/Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/tempo_inventory/illustration.ly'
    Parsing...
    Interpreting music...
    Preprocessing graphical objects...
    Finding the ideal number of pages...
    Fitting music on 1 page...
    Drawing systems...
    Layout output to `/Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/tempo_inventory/illustration.candiate.ps'...
    Converting to `/Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/materials/tempo_inventory/illustration.candiate.pdf'...
    Success: compilation successfully completed

    >