page breaking and vector_sort cleanups

[Joe Neeman]

This patch STL-ifies vector_sort much like my previous patch for
binary_search. It also includes my patch for rewriting the
interpretation step for page turns.

These changes touch a lot of files, so I'd like to get them committed
before I mess up my working tree with grob graphing stuff.

2006-09-17  Joe Neeman  <address@hidden>

        * scm/define-music-types.scm (music-descriptions): remove
        BreakEvent and fix {Page,Line}{Break,Turn}Event so
        Music::to_event doesn't complain.

        * lily/accidental-placement.cc (ape_compare):
        * lily/semi-tie.cc (compare): 
        * lily/note-column.cc (shift_compare): replace by XXX_less

        * lily/tie-formatting-problem.cc (set_chord_outline): 
        * lily/tie-column.cc (calc_positioning_done): 
        * lily/system.cc (post_processing)
        (get_paper_system): 
        * lily/stem.cc (note_head_positions)
        (calc_positioning_done): 
        * lily/spanner.cc (do_break_processing)
        (find_broken_piece): 
        * lily/span-bar.cc (print): 
        * lily/semi-tie-column.cc (calc_positioning_done): 
        * lily/rest-collision.cc (calc_positioning_done): 
        * lily/program-option.cc (get_help_string): 
        * lily/note-collision.cc (get_clash_groups):
        * lily/new-fingering-engraver.cc (position_scripts):
        * lily/keyword.cc (Keyword_table):
        * lily/hara-kiri-group-spanner.cc (request_suicide):
        * lily/grob-pq-engraver.cc (stop_translation_timestep):
        * lily/accidental-placement.cc (calc_positioning_done):
        (stagger_apes):
        * lily/beam.cc (get_beam_segments):
        * lily/grob-array.cc (remove_duplicates):
        use new vector_sort
        
        * input/mutopia/W.A.Mozart/mozart-hrn3-defs.ily:
        ragged-last-bottom = ##f (test the new page breaker)

        * flower/include/std-vector.hh (vector_sort): use STL sort stuff

        * scm/define-context-properties.scm
        (all-internal-translation-properties): remove properties that
        were used to communicate page-turn stuff to the paper-column
        engraver.

        * lily/lily-guile.cc (robust_scm2string): new function

        * lily/paper-column-engraver.cc: Clean up page turn stuff

        * lily/page-turn-engraver.cc: Re-write the page turn logic here
        instead of cluttering up paper-column-engraver.cc

page_breaking_cleanup.patch
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