saugns v0.4.6. Added `R` flag `p` for 1D Perlin noise modes.
Language changes:
* Signal generator types. `R` mode `m` flags:
- Add `p` (Perlin noise mode) to reshape the waveform for
1D Perlin noise, combinable with all noise functions and
other flags.
- Change updating of flags when adjusting mode; now every
flag set is kept until setting a function, which clears
old flags. Before, any change to mode cleared old flags.
(Makes especially the use of parameter `.a` less clunky.)
Also fix `m.a... ma`, now handled like `ma.a...`.
* Line types.
- Add `smo` (Smoothstep degree 5),
a sinuous curve traditionally used for Perlin noise.
* Seed parameter. Make `s` recognize the same numerical
constants as `p` (phase), currently `G`.