saugns v0.4.2c. Add quartertone pitch names, add JI systems.
Language changes:
* Frequencies as notes.
- Add flat 'b' alias ('f' still supported).
- Add half-flat 'd' and half-sharp 'z'.
- Add flat-and-a-half 'v' and sharp-and-a-half 'k'.
- Add double-flat 'w' and double-sharp 'x'.
- Add "S f.s" tuning systems 'c' (classic
5-limit JI) and 'p' (Pythagorean 3-limit JI).
Revise and extend frequency as note further.
Extend default 12TET-based options to 24TET;
use the 7-factor quartertone for JI tunings.
(JI is short for just intonation.)
Add a classic 5-limit JI 'c' mode with sharp
and flat always the same size unlike in 'j'.
Also add Pythagorean tuning system mode 'p'.