ParameterNode = function(audiolet, value) {
    AudioletNode.call(this, audiolet, 1, 1);
    this.parameter = new AudioletParameter(this, 0, value);
}
A type of AudioletNode designed to allow AudioletGroups to exactly replicate
the behaviour of AudioletParameters.  By linking one of the group's inputs
to the ParameterNode's input, and calling `this.parameterName =
parameterNode` in the group's constructor, `this.parameterName` will behave
as if it were an AudioletParameter contained within an AudioletNode.

**Inputs**

- Parameter input

**Outputs**

- Parameter value

**Parameters**

- parameter The contained parameter.  Linked to input 0.

@constructor
@extends AudioletNode
@param {Audiolet} audiolet The audiolet object.
@param {Number} value The initial static value of the parameter.