Transferring Metronome to modular js package

Installation:

npm install metro-l

Include it by:

var metronome= require('metro-l');

var metroInstance= new metronome();
console.log('metronome', metroInstance.init());

Add this file to root: https://github.com/cwilso/metronome/blob/master/js/metronomeworker.js

Include this file in the link header: http://cwilso.github.io/AudioContext-MonkeyPatch/AudioContextMonkeyPatch.js

<script src="//cwilso.github.io/AudioContext-MonkeyPatch/AudioContextMonkeyPatch.js"></script>