allow default loadPrefab so references are working

hide.hxml

@@ -1,4 +1,5 @@
 common.hxml
+-D hide
 -js bin/hide.js
 -main hide.Ide
 --macro include("h3d.shader")

hrt/prefab/ContextShared.hx

@@ -69,7 +69,7 @@ class ContextShared {
 	}
 
 	public function loadPrefab( path : String ) : Prefab {
-		throw "Not implemented";
+		return hxd.res.Loader.currentInstance.load(path).toPrefab().load();
 	}
 
 	public function loadShader( path : String ) : ShaderDef {