patch::: 1.3.35.jcn1

1.3.35.jcn1
===========

* Added minimum-space property to Side_position_interface.  Used in
  positioning of Volta_spanner: voltaMinimumSpace.

* Fixed and cleaned-up volta-spanner.

* Moved directional-element.cc -> directional-element-interface.cc

* Renamed all `process_requests' to `process_music', which fixes
  midi performance.

* Fixed dimensions (more x-y interchanges) of brace, bracket and
  volta-spanner.

* Bit half-baken fix in to get similar vertical placement of orphaned vs.
  line-spanned dynamic elements.

* Added property bracketCollapseHeight: the minimal size of a staff bracket
  that will be typeset.  Smaller brackets will not be displayed.  This
  fixes the (in 1.3.x reintroduced) funny duck-beak-bracket-bug (sorry).

* Removed some dissonant chords from Coriolan