Cleaned up BuildFileWrangler main menu.

Moved a number of sections from main menu to (?) menu.

Example:

    Red Example Score (2013) - build directory

        1: draft.pdf
        2: draft.tex
        3: score-back-cover.pdf
        4: score-back-cover.tex
        5: score-front-cover.pdf
        6: score-front-cover.tex
        7: score-preface.pdf
        8: score-preface.tex
        9: score.pdf
        10: score.tex
        11: segment-01.ly
        12: segment-02.ly
        13: segment-03.ly

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

        segment assembly ly - edit (sege)
        segment assembly ly - lilypond (segly)
        segment assembly pdf - open (sego)

        segment lys - copy (lycp)
        segment pdfs - copy (pdfcp)

    > ?

    Red Example Score (2013) - build directory

        back cover latex - edit (bce)                      Python - doctest (pyd)
        back cover latex - generate (bcg)                  Python - invoke (pyi)
        back cover latex - typeset (bct)                   Python - test (pyt)
        back cover pdf - open (bco)
                                                           repository - add (rad)
        commands - all (?)                                 repository - commit (rci)
                                                           repository - revert (rrv)
        directory - list (ls)                              repository - status (rst)
        directory - list long (ll)                         repository - update (rup)

        draft latex - edit (de)                            score latex - edit (se)
        draft latex - generate (dg)                        score latex - generate (sg)
        draft latex - typeset (dt)                         score latex - typeset (st)
        draft pdf - open (do)                              score pdf - open (so)

        edit - current stylesheet (Y)                      segment assembly ly - edit (sege)
                                                           segment assembly ly - lilypond (segly)
        files - copy (cp)                                  segment assembly pdf - open (sego)
        files - new (new)
        files - remove (rm)                                segment lys - copy (lycp)
        files - rename (ren)                               segment pdfs - copy (pdfcp)

        front cover latex - edit (fce)                     session - display variables (sdv)
        front cover latex - generate (fcg)
        front cover latex - typeset (fct)                  system - quit (q)
        front cover pdf - open (fco)                       system - shell (!)

        go - back (b)                                      views - apply (va)
        go - home (h)                                      views - list (vls)
        go - score (s)                                     views - new (vnew)
                                                           views - remove (vrm)
        go - next score (>>)                               views - rename (vren)
        go - previous score (<<)
                                                           views module - read only (vmro)
        go - build (u)                                     views module - remove (vmrm)
        go - distribution (d)
        go - makers (k)
        go - materials (m)
        go - segments (g)
        go - stylesheets (y)

        go - clear view (V)

        LilyPond log - read only (llro)

        preface latex - edit (pfe)
        preface latex - generate (pfg)
        preface latex - typeset (pft)
        preface pdf - open (pfo)

    >