fixed deps
unused argument
moved math tests to Core
added math expression test
recursively handles nested objects
Tone.ScaleExp scales values with an exponent

Fixes #14
added Tone.ScaleExp tests
EnvelopeFollower with independent attack / decay
updated docs on LFO
updated description on Effect
renamed delay to delayTime
more consistent spacing
privatized the _scalar
effects default to 100% wet
AutoWah effect
bit crusher extends Tone.Effect
consistent spacing
privatized panner
updated doc
description of _merger