fixes calling setBuffer after Audio has been played
and makes get/setLoop consistent with get/setPlaybackRate.

* convert to ES modules

* rebuild

* move shaders back into glsl files

* reinstate polyfills

* Audio.js - set isPlaying to false in stop()

* Audio.js - set isPlaying to false in stop()(2nd try)

* node material r5 + mirror nodes example

* threejs.min in node material examples

* sea3d update

* reverted to un-minified

* update mrdoob EventDispatcher.js

* fix eventdispatcher update

* proto defines replace by Object.assign

* native script support transferred to loader

* sound filters support

* light intensity from sound amplitude

* keep .setFilter() method

* get freq amplitude average

* cleanup

* use THREE.AudioAnalyser to get amplitude

cleaning up duplicate code in PositionalAudio and enabling the 'unsetting' of a filter with setting a null filter

adding back updated load function to Audio for compatibility, AudioBuffer now only take the Audio context instead of the listener at creation

 Changes to be committed:
	modified:   examples/misc_sound.html
	new file:   examples/sounds/Project_Utopia.ogg
	modified:   examples/sounds/readme.txt
	modified:   src/audio/Audio.js
	new file:   src/audio/AudioBuffer.js
	modified:   src/audio/AudioListener.js
	new file:   src/audio/PositionAudio.js
	modified:   utils/build/includes/common.json

Use source.onended for handling the 'ended' event (in response to the audio track finishing playback)