saugns v0.3.10b. Various fixes. Add freqlinkPM syntax. Fixes: * Audio: The v0.3.9 oscillator produced jagged shapes and audible distortion when PM modulator amplitudes were large. Fixed but made generation a bit slower. * Numerical expressions: Fixed parsing of unary minus several times in a row and in combination with "^". * Timing syntax: Correct handling of "\" after ";" in compound steps for modulator operators. Re-set time using the last default value, not the last explicit "t" value. Makes implicit time handling consistent. Syntax changes: * Add new "p+f[...]" syntax, for frequency-linked PM. Multiplies the amplitude of modulators with carrier frequency scaled so that 632.45... Hz has 1.0 gain. Based on an idea I remember from 2011, before I got normal modulation in order, now seeming worthwhile. Rework some scripts to show the use of the new syntax. Clarify documentation a little bit more, regarding FM.