#24 Rewrite to es6 (#26)

* Add _interface_ IStupidPlayer

* Refactor stupid-player using es6 syntax

* Fix editorconfig

* Fix IStupidPlayer for node.js

* Fix {I, }StupidPlayer for node.js v4, v5

* Use arrow function in class. Move hooks from stupid-player-old

* Remove set/get, add methods

* Bind context on hooks.

* Move code blocks

.editorconfig

@@ -14,7 +14,7 @@ insert_final_newline = true
 charset = utf-8
 
 # Indentation override for all JS under lib directory
-[src/**.js]
+[**.js]
 indent_style = tab
 
 # Matches the exact files either package.json or .travis.yml

lib/interfaces/i-stupid-player.js

@@ -0,0 +1,91 @@
+const events = require('events');
+
+
+
+/**
+ * @interface
+ */
+module.exports = (function() {
+	'use strict';
+	return class IStupidPlayer extends events.EventEmitter {
+		constructor() {
+			super();
+
+			/**
+			 * @const {string}
+			 */
+			this.EVENT_PLAY = 'play';
+
+			/**
+			 * @const {string}
+			 */
+			this.EVENT_STOP = 'stop';
+
+			/**
+			 * Fired with: {number} volume
+			 * @const {string}
+			 */
+			this.EVENT_VOLUME_CHANGE = 'volume-change';
+
+			/**
+			 * Fired with: string
+			 * @const {string}
+			 */
+			this.EVENT_ERROR = 'error';
+		}
+
+		/**
+		 * @param {string} url
+		 * @return {Promise<undefined>}
+		 */
+		play(url) {
+			throw 'IStupidPlayer.play not implemented';
+		}
+
+		/**
+		 * @return {Promise<undefined>}
+		 */
+		pause() {
+			throw 'IStupidPlayer.pause not implemented';
+		}
+
+		/**
+		 * @return {Promise<undefined>}
+		 */
+		stop() {
+			throw 'IStupidPlayer.stop not implemented';
+		}
+
+		/**
+		 * @return {number} 0..100
+		 */
+		getVolume() {
+			throw 'IStupidPlayer.[[Get]]volume not implemented';
+		}
+
+		/**
+		 * @param {number} value 0..100
+		 */
+		setVolume(value) {
+			throw 'IStupidPlayer.[[Set]]volume not implemented';
+		}
+
+		/**
+		 * @return {IStupidPlayer.State}
+		 */
+		get state() {
+			throw 'IStupidPlayer.[[Get]]state not implemented';
+		}
+
+		/**
+		 * @enum {string}
+		 */
+		static get State() {
+			return {
+				PAUSE: 'pause',
+				PLAY: 'play',
+				STOP: 'stop'
+			};
+		}
+	};
+})();