Merge branch 'master' into topic/master-translation

Merge branch 'master' into topic/master-translation

* master: (21 commits)
  Fix #281.
  Fix #51.
  Fix rest-dot-position.ly
  Fix collision-dots-move.ly
  formatting nit.
  also handle rests for dot positioning
  bugfix: don't return flag for invisible stems.
  Cleanup and simplify  dot column formatting logic.
  add prototypes.
  trim outdated comment
  Add Skyline::print_points(), Offset::swapped()
  make Dot_configuration into class, in new files dot-configuration.{cc,hh}
  use ly:progress for backend-svg
  always compile in Grob::instrumented_set_property
  whitespace cleanup.
  Edit docs translation instructions
  bump version
  use envp argument for main()
  strip LD_LIBRARY_PATH from inkscape call.
  Fix backend-svg.ly for ubuntu 6.06
  ...