Added HTML5AudioFile class for loading audio with html5 audio tag

v3/src/loader/filetypes/HTML5AudioFile.js

@@ -0,0 +1,28 @@
+var Class = require('../../utils/Class');
+var File = require('../File');
+var GetFastValue = require('../../utils/object/GetFastValue');
+
+//  Phaser.Loader.FileTypes.HTML5AudioFile
+
+var HTML5AudioFile = new Class({
+
+    Extends: File,
+
+    initialize:
+
+        function HTML5AudioFile (key, url, path, config)
+        {
+            var fileConfig = {
+                type: 'audio',
+                extension: GetFastValue(url, 'type', ''),
+                key: key,
+                url: GetFastValue(url, 'uri', url),
+                path: path,
+                config: config
+            };
+
+            File.call(this, fileConfig);
+        }
+});
+
+module.exports = HTML5AudioFile;