Merge branch 'master' into topic/master-translation

* master: (23 commits)
  Automagic update from LSR.
  Improve makelsr script.
  Fix regression tests.
  Use the right property name for vertical skylines.
  Fix warning message when forced break gets ignored.
  Fix #341.
  Clean up graphviz.scm and remove ly:atexit.
  Fixes bugs in the page breaking refactor.
  Fix corner case in min_page_count.
  Refactor page breaking to give a higher-level interface to the individual
  Re-add chapter on two-pass spacing (but warn that it is deprecated)
  Shut up 'ignoring grob for slur' warnings with PhrasingSlur
  Fix regression test (so that the notes fit on one line)
  Fixes bugs in the page breaking refactor.
  Fix corner case in min_page_count.
  Refactor page breaking to give a higher-level interface to the individual
  Fix keep-fixed-while-stretching example.
  Document one-pass vertical stretching.
  Added some info on the LilyPond extensions available for the TexShop editor.
  Chromatic staff
  ...