Add ecs ComponentListener

- Add ecs ComponentListener which listens to Component addition and
  removal
- Add RefCounter class used to keep track of moves and copies

CopiumEngine/src/copium/core/Window.cpp

@@ -12,6 +12,8 @@
 #include "copium/event/WindowResizeEvent.h"
 #include "copium/event/WindowFocusEvent.h"
 
+#include <GLFW/glfw3.h>
+
 namespace Copium
 {
   Window::Window(const std::string& windowName, int width, int height, WindowMode mode)
@@ -27,6 +29,22 @@ namespace Copium
     glfwDestroyWindow(window);
   }
 
+  bool Window::ShouldClose() const
+  {
+    return glfwWindowShouldClose(window);
+
+  }
+
+  int Window::GetWidth() const
+  {
+    return width;
+  }
+
+  int Window::GetHeight() const
+  {
+    return height;
+  }
+
   VkSurfaceKHR Window::GetSurface() const
   {
     return surface;