Support 1.9.6 format changes

[matthewryanscott]

A TODO list to track the addition of SunVox 1.9.6-related changes to the radiant-voices 1.0.0-dev branch.

• [x] ADSR: add module
• [x] Ctl2Note: add module
• [x] Pitch Detector: add module
• [x] Analog Generator: add waveform "harmonics"
• [x] SpectraVoice: add harmonic types:
  • [x] overtones1+
  • [x] overtones2+
  • [x] overtones3+
  • [x] overtones4+
  • [x] metal
• [x] LFO: add controller "frequency scale"
• [x] LFO: add controller "smooth transitions"
• [x] Sound2Ctl: add option "send only changed values"
• [x] MultiSynth: add options:
  • [x] "Round the note (X-axis on curve3) to the nearest integer" (remove microtones);
  • [x] "Round the pitch (Y-axis on curve3) to the closest";
  • [x] "Record notes to the scale (curve3)"; see example "dynamic scale";
  • [x] "Output note = Output note - Input note + C5" (difference between output and input pitch);
  • [x] "Output port number = note % number of connected outputs"; (% is the modulo (remainder) operation); see example "drumkit 3 (multisynth)";
  • [x] "Output port number = polyphonic channel % number of connected outputs";
• [ ] MultiSynth: add curve 3 describing the dependence of the output pitch on the input note;
• [x] MetaModule: add options:
  • [x] "Receive notes from the keyboard"
  • [x] "Don't receive notes from the keyboard"
• [x] Pitch shifter: add controller "bypass if pitch=0"
• [ ] MIDI in mode: add "never"
• [ ] Add pattern effects 05/06 pitch bend up/down
• [ ] Add methods for loading/saving curves from SunVox curve files
• [x] Port tests from JS version to Python
• [x] Overhaul handling of options in JS and Python

[matthewryanscott]

Converted remainder of the TODO items to separate issues.