saugns v0.5.6c. Ratio carrier selection for modulators. Fix. Language changes: * Frequency. Ratio carrier selection for modulators. Every modulator now has the `r.c` option; it allows overriding which carrier's frequency is multiplied by the `r` value (by default going up one level, `r.c-1`). Changing it to 0 or a positive value will go inward, from the root/top. Values out of range are clamped to the range, from root, to the level just above the modulator being set. Fix v0.5.6 edge case bug for frequency parameter sweeps; if using ratio for goal but not for state or vice-versa (mixed rather than consistent selection), the newer handling could mess up the signal. Scripts like the below are now fixed. "W f[W f10 a440] t10 p[R f440 r[g1]]"