3.0.1

• Timers now have fps and fps_average properties for obtaining the current and average frame rate
• Added WindowConfig.hidden_window_framerate_limit limiting framerate when the window is hidden.
  The default value is currently 30 fps. This can be disabled by setting the value to 0.
  This change combats framerate spikes in the thousands when the window is minimized eating up
  battery life and resources.
• WindowConfig.init_mgl_context can now be implemented to completely override context creation.
• run_window_config was split into create_window_config_instance and run_window_config_instance
  making customization easier. run_window_config will still behave as before.
• Some doc improvements