release: 1.3.70

release: 1.3.70

======

* Cleanup auto-beam-engraver: use properties for retrieving timing
information.

* Fixed: Multi measure rests don't cause crashes.

* Fixed: don't invoke Hara_kiri::consider_suicide too early.

* Fixed: property engraver.

* Fixed: don't crash on multiple ties.

* Cleanups of Beam, should also be a little faster.

* Reunite properties and pointers. In implementation we make a
distinction between mutable and immutable properties

* Add {has|set}_interface () static methods to interface classes.

* Made Side_position_interface and Staff_symbol_interface an all
statics class, and stripped _interface suffix.

* Make Align_interface and Axis_group_interface an all-statics class

* Rhythmic_head, Staff_symbol, Grace_align_item, Break_align_item,
Bar, Span_bar are now interfaces, Staff_bar was removed. Use a
callback for determining barsize.

* Removed all GLUE_SCORE_ELEMENT callbacks.

* Added test for repeats to trip.ly

1.3