Updated Howler to enable sound position (#1243)

Updated Howler to version 2.0.15

For what we use, we could use the "stereo()" function but as we already generated the coordinates, I settled for the "pos()" function.

My knowledge of sound isn't enough to understand where the "w" variable of the position goes (as "pos()" uses only x, y and z). My guess is that "pannerAttr()" might have the access to what we are looking for, but again I don't fully understand sound.

src/lime/_internal/backend/html5/HTML5AudioSource.hx

@@ -280,7 +280,13 @@ class HTML5AudioSource {
 
 		#if lime_howlerjs
 		
-		// TODO: Use 3D audio plugin
+		//This should work, but it returns null (But checking the inside of the howl, the _pos is actually null... so ¯\_(ツ)_/¯)
+		/*
+		var arr = parent.buffer.__srcHowl.pos())
+		position.x = arr[0];
+		position.y = arr[1];
+		position.z = arr[2];
+		*/
 		
 		#end
 
@@ -298,7 +304,8 @@ class HTML5AudioSource {
 
 		#if lime_howlerjs
 		
-		// TODO: Use 3D audio plugin
+		parent.buffer.__srcHowl.pos (position.x, position.y, position.z, id);
+		//There are more settings to the position of the sound on the "pannerAttr()" function of howler. Maybe somebody who understands sound should look into it?
 		
 		#end
 

src/lime/media/howlerjs/Howl.hx

@@ -237,10 +237,34 @@ class Howl {
 	}
 
 	
+	/**
+	* Get/set the 3D spatial position of the audio source for this sound or group relative to the global listener.
+	* @param  x  The x-position of the audio source.
+	* @param  y  The y-position of the audio source.
+	* @param  z  The z-position of the audio source.
+	* @param  id The sound ID. If none is passed, all in group will be updated.
+	* @return Returns self or the current 3D spatial position: [x, y, z].
+	*/
+	public function pos (?x:Float, ?y:Float, ?z:Float, ?id:Int):Dynamic {
+
+		return null;
+
+	}
+	
+	
+	/**
+	* Get/set the stereo panning of the audio source for this sound or all in the group.
+	* @param  pan  A value of -1.0 is all the way left and 1.0 is all the way right.
+	* @param  id (optional) The sound ID. If none is passed, all in group will be updated.
+	* @return Returns self or the current stereo panning value.
+	*/
+	public function stereo (?pan:Float, ?id:Int):Dynamic {
+
+		return null;
+
+	}
+
 }
-
-
-
 #else
 
 
@@ -299,6 +323,15 @@ extern class Howl {
 	@:overload(function(vol:Float, id:Int):Howl {})
 	public function volume ():Float;
 
+	@:overload(function(pan:Float):Howl {})
+	@:overload(function(pan:Float, id:Int):Howl {})
+	public function stereo():Float;
+	
+	@:overload(function(x:Float):Howl {})
+	@:overload(function(x:Float,y:Float):Howl {})
+	@:overload(function(x:Float,y:Float,z:Float):Howl {})
+	@:overload(function(x:Float,y:Float,z:Float,id:Int):Howl {})
+	public function pos():Array<Float>;
 
 }