Changed (pdfcp) to (dc).

Location: build directory (u).

OLD: 'segments - copy pdfs' (pdfcp).
NEW: 'draft - collect segment files' (dc).

Explanation: composers only collect segment PDFs to make a draft.

The build directory commands now look like this:

    Red Example Score (2013) - build files

        back cover - edit latex source (bce)               repository - add (rad)
        back cover - generate latex source (bcg)           repository - commit (rci)
        back cover - interpret latex source (bci)          repository - revert (rrv)
        back cover - open pdf (bco)                        repository - status (rst)
                                                           repository - update (rup)
        draft - collect segment files (dc)
        draft - edit latex source (de)                     score - edit latex source (se)
        draft - generate latex source (dg)                 score - generate latex source (sg)
        draft - interpret latex source (di)                score - interpret latex source (si)
        draft - open pdf (do)                              score - open pdf (so)

        files - copy (cp)                                  system - LilyPond log (ll)
        files - new (new)                                  system - Python (pyi)
        files - remove (rm)                                system - commands (?)
        files - rename (ren)                               system - doctest (pyd)
                                                           system - py.test (pyt)
        front cover - edit latex source (fce)              system - quit (q)
        front cover - edit; interpret; open (fceio)        system - session variables (sv)
        front cover - generate latex source (fcg)          system - shell (!)
        front cover - interpret latex source (fci)
        front cover - open pdf (fco)                       views - apply (va)
                                                           views - clear (vc)
        go - back (b)                                      views - list (vls)
        go - home (h)                                      views - new (vnew)
        go - score (s)                                     views - remove (vrm)
                                                           views - rename (vren)
        go - next score (>>)                               views - view module (vmro)
        go - previous score (<<)

        go - build (u)
        go - distribution (d)
        go - makers (k)
        go - materials (m)
        go - segments (g)
        go - stylesheets (y)

        go - edit current stylesheet (Y)

        music - collect segment files (mc)
        music - edit lilypond source (me)
        music - generate lilypond source (mg)
        music - interpret lilypond source (mi)
        music - open pdf (mo)

        preface - edit latex source (pe)
        preface - generate latex source (pg)
        preface - interpret latex source (pi)
        preface - open pdf (po)

    >