Moved audio out of extras.

utils/build/includes/common.json

@@ -51,6 +51,8 @@
 	"src/animation/tracks/QuaternionKeyframeTrack.js",
 	"src/animation/tracks/StringKeyframeTrack.js",
 	"src/animation/tracks/VectorKeyframeTrack.js",
+	"src/audio/Audio.js",
+	"src/audio/AudioListener.js",
 	"src/cameras/Camera.js",
 	"src/cameras/CubeCamera.js",
 	"src/cameras/OrthographicCamera.js",

utils/build/includes/extras.json

@@ -2,8 +2,6 @@
 	"src/extras/CurveUtils.js",
 	"src/extras/SceneUtils.js",
 	"src/extras/ShapeUtils.js",
-	"src/extras/audio/Audio.js",
-	"src/extras/audio/AudioListener.js",
 	"src/extras/core/Curve.js",
 	"src/extras/core/CurvePath.js",
 	"src/extras/core/Path.js",