Added laser collision on aliens

include/Alien.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <iostream>
+#include <SFML/Graphics.hpp>
+
+using namespace std;
+using namespace sf;
+
+class Alien
+{
+public:
+	Alien(Vector2f& position);
+
+	RectangleShape& getShape() { return _shape; };
+
+private:
+	RectangleShape _shape;
+};