New features in 1.5

* Tablature support.

* Many speedups, many slowdowns.

* More extensibility.

* Figured bass support.

* Improved beam formatting.

* Improved grace notes.

* Improved accidental handling and formatting.

* Better spacing.  Includes subtle details like optical stem spacing.

* More ancient notation support: mensural ligatures, porrectuses,
ambituses, more shapes.

* Bracket piano pedals.

* Some music entry optimizations.

* Font completely revised and improved.

* Completely rewritten midi input support.

* Manual thoroughly revised manual.

* Many bugfixes