usability

[p0nce]

• readParamdouble doesn't exist, despite parameters being double internally
• I think some setNormalize option doesn't clamp, I don't remember which one exactly
  Specifically: setFromGUINormalized is a public API that exists for IntegerParameter and FloatParameter
  Calling them with out of [0 .. 1] should clamp them, but also create a debug time assertion, instead of just having the debug time assertion. It is because the primary user for this call is sliders and knobs of all sort, who maintain complicated dragging invariants. Now outside 0 to 1 is allowed.
• A Bessel 2-pole in iir.d, since it's very useful
• UISlider has sensitivity as a property, instead of a Wren-accessible script property (variable), which isn't same as UIKnob. Change that to regular variable.

[p0nce]

• convertDecibelToLinearGain called with int is an issue. Specialize the function instead.