Updated TODO.
Merged master.
Implemented (spo*).

Description: use 'all packages - score.pdf - open' (spo*) to open all finished
scores in all your score packges.

Example:

    > spo*
    Will open ...
        /Users/trevorbaca/Documents/scores/cary/distribution/cary-annotated-distribution-score.pdf
        /Users/trevorbaca/Documents/scores/chrysanthemums/distribution/chrysanthemums-score.pdf
        /Users/trevorbaca/Documents/scores/archipel/distribution/archipel-score.pdf
        /Users/trevorbaca/Documents/scores/lidercfeny/distribution/lidercfeny-score.pdf
        /Users/trevorbaca/Documents/scores/imaginaire/distribution/imaginaire-score.pdf
        /Users/trevorbaca/Documents/scores/desir/distribution/desir-annotated-score.pdf
        /Users/trevorbaca/Documents/abjad/scoremanager/scores/red_example_score/distribution/red-example-score.pdf
        /Users/trevorbaca/Documents/scores/sekka/distribution/sekka-annotated-distribution-score.pdf
    Ok? y

The method checks both distribution/ and build/ directories.
Merged master.