adding Tone.js as a node module, and p5.Signal returns a Tone.Signal
updating docs
Oscillator add, mult and scale return Oscillator instead of Signal
removed unused src files, Env.add/mult/scale returns itself and uses Tone.Signal
parts play and loop with Tone.Clock
p5.Score and onStep() working with Tone.Clock / p5.Metro
abstracting p5.Panner and some signal math trying to eliminate redundancy
documenting looper