Added autoeditor (AE) indicator to material package breadcrumbs.

Example:

    Red Example Score (2013) - materials - instrumentation (AE)

        * hornist: horn
        * trombonist: tenor trombone
        * pianist: piano
        * percussionist: no instruments
        * violinist: violin
        * cellist: cello

       => output.py
       => __init__.py
       => __metadata__.py
       => versions/

          material - autoedit (mae)
          material - illustrate (mi)

          output py - open (omo)
          output py - write (omw)

          package - autoeditor - unset (aeu)

    >