update test bootstrap
add NeuParam test: _connect(to)
refactor NeuParam
add NeuSynth::makeOutlet(context, ugen)
fix NeuSynth: use NeuSynth::makeOutlet(context, ugen)
fix ugen/add test
fix NeuUGen constructor
fix ugen/mul
add NeuUGen test: _connect(to)
refactor NeuUGen
fix NeuUGen#$offset
add NeuDryWet
fix neume.js
fix ugen/conv: dry/wet support
add _.clip(value, min, max)
add plugins/fb-delay