This is a simple OpenGL application framework around GLFW

• Custom application is derived from GLApplication::Application
• Functions called in this order:
  • InitializeApplication called before window creation. It's a good place to call glfwWindowHint for setup
  • InitializeContext called after the window is created and the OpenGL context is current. It's a place to set up resources before the main render loop starts.
  • Update Called every frame while the window is open
• OnKey is currently the only event handler implemented. The default closes the application when ESC is pressed.
• Needs a lot more work to be a complete OpenGL application framework