Added event class for sound value change

Author: pavle-goloskokovic

v3/src/sound/SoundValueEvent.js

@@ -0,0 +1,19 @@
+var Class = require('../utils/Class');
+var SoundEvent = require('./SoundEvent');
+
+var SoundValueEvent = new Class({
+
+    Extends: SoundEvent,
+
+    initialize:
+
+        function SoundValueEvent (sound, type, value)
+        {
+            SoundEvent.call(this, sound, type);
+
+            this.value = value;
+        }
+
+});
+
+module.exports = SoundValueEvent;