[ADD] the pause menu can be accessed with the 'P' key. the real button are not implemented yet.

src/scenes/scene.cpp

@@ -0,0 +1,7 @@
+#include <iostream>
+#include "scene.h"
+
+scene::Scene::~Scene()
+{
+	std::cout << "Main scene class gone!" << std::endl;
+}