Add 'sori' and 'koron' accidentals for Iranian music notation
- mf/feta-sori-koron.mf: New file, defining glyphs 'sharp.sori' and 'flat.koron'.
- input/regression/iranian-accidental-glyphs.ly: New test file.
- ps/encodingdefs.ps (LilyOtherEncoding): Updated. Also reformatted to make future insertions of glyphs easier to handle manually.
- Documentation/en/changes.itely: Updated.
Also add a stub on Iranian music to the NR.
Fixes #738 (closed).
Edited by Werner Lemberg