Implementing basic scene tree

src/Engine/Scene/Scene.h

@@ -0,0 +1,14 @@
+#include "MinimalEngine.h"
+#include "Actor/Actor.h"
+
+namespace Seele
+{
+class Scene
+{
+public:
+    Scene();
+    ~Scene();
+private:
+    Array<PActor> rootActors;
+};
+}