Maintainance

GLFW window shutdown is not being handled properly. For instance in the ShutDown() routine here

void WindowsWindow::ShutDown()
{
	glfwDestroyWindow(m_Window);
}

the GLFW method glfwTerminate() is not called and this example shows it should. The changes need to be implemented in Linux and Mac windows as well

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The access specifier here should be private.