Lots of work on Audio & Physics engine:

-Added new 3D stream player node
-Added ability for Area to capture sound from streams
-Added small features in physics to be able to properly guess distance to areas for sound
-Fixed 3D CollisionObject so shapes are added the same as in 2D, directly from children
-Fixed KinematicBody API to make it the same as 2D.

core/engine.cpp

@@ -119,4 +119,6 @@ Engine::Engine() {
 	_fixed_frames = 0;
 	_idle_frames = 0;
 	_in_fixed = false;
+	_frame_ticks = 0;
+	_frame_step = 0;
 }