plugEmIn = function(that, arg){
	let destination = ( arg && arg.destination ) || that.destination;
	let lastStop;
	for ( let i = 1; i < that.nodes.length; i++ ) {
		let from;
		let to;
		if ( that.nodes[i-1].interface === 'custom' ) {
			from = that.nodes[i-1].output;
		}
		else { // assume native interface
			from = that.nodes[i-1];
		}
		if ( that.nodes[i].interface === 'custom' ) {
			to = that.nodes[i].input;
		}
		else { // assume native interface
			to = that.nodes[i];
		}
		from.connect(to);
	}
	if ( that.nodes[that.nodes.length-1].interface === 'custom') {
		lastStop = that.nodes[that.nodes.length-1].output;
	}
	else { // assume native interface
		lastStop = that.nodes[that.nodes.length-1];
	}
	lastStop.connect(destination);

}
When all the nodes are set up for this Wad, this function plugs them into each other,
with special handling for nodes with custom interfaces (e.g. reverb, delay). *