release: 1.3.88

release: 1.3.88

===========

* Sequential_iterator::get_music (), part combiner now works.

* Changed paper variables into elt properties:
  Beam:
  - beam-space-function, Removed Paper_def::interbeam_f(), Smaller
  beams for grace notes.
  - beam-flag-width-function to Beam.

  Grace_align_item:
  -  horizontal-space: spacing of is configurable

  Volta_spanner:
  - height
  - thickness

  Multi_measure_rest:
  - expand-limit
  - minimum-width
  - padding

  Lyric_extender:
  - height

  Stem
  - thickness

  Collision
  -  note-width to Collision

* removed various obsolete variables from params.ly

* added input/test/bagpipe.ly

1.3