Flattening build menu.

Flattened back cover commands:

    Traiettorie inargentate (2013) - build manager

        back cover latex - edit (bce)
        back cover latex - generate (bcg)
        back cover latex - typeset (bct)
        back cover pdf - view (bcv)

        front cover latex - edit (fce)
        front cover latex - generate (fcg)
        front cover latex - typeset (fct)
        front cover pdf - view (fcv)

        preface - manage (pf)
        score - manage (sc)

    > q