Changes:
- On a 64-bit system, stretching and shearing fonts did not work. I only noticed
  when I upgraded to a 64-bit system; clearly not many people use this feature.
- Under some circumstances, a spurious error "An input line is too long when
  macros are expanded" could be generated. This showed up on a 64-bit system
  with 4G of memory, but I'm not sure which exact condition provoked it.

PR:		188120
Submitted by:	Muhammad Moinur Rahman <5u623l20@gmail.com> (maintainer)

- Pass maintainership to submitter

Changes:
- If a bar containing a long rest symbol is wider or narrower than normal, the
  |----| symbol is now drawn instead of using the font character. This means it
  can be made longer or shorter. In particular, it is now possible to have one
  long bar right across the page as is common in instrumental parts for tacet
  movements.
- Updated font-handling to add the remaining Unicode characters in the Latin-A
  extended font, together with the infinity character, all of which are present
  in modern fonts.
- The PDF index in the manual now has clickable links to the individual letter
  headings in the index.

PR:		ports/184514
Submitted by:	Muhammad Moinur Rahman <5u623l20@gmail.com>

- Add LICENSE
- Support staging

PR:		ports/181070
Submitted by:	KATO Tsuguru <tkato432@yahoo.com>

While here, modernize headers.