release: 1.3.79

release: 1.3.79

===========

* Made simple fix to get part-combiner to recognise different rhythms

* Unhardcoded part combiner and a2-engraver; introduced properties
  splitInterval, soloADue, soloText, soloIIText, aDueText.

* Fixed part combiner's too-late problem (Dankje!)

* Fixed a2-devnull-engraver, a2-engraver.

* Renamed part combiner music names to "one", "two".

* Cleaned up decision making in part combiner, renamed to "solo"/"unison"

1.3.77.