Usage:

1. Add this to your Stage: rust .with_pass(amethyst_imgui::DrawUi::default())
2. Add this to your handle_event: rust amethyst_imgui::handle_imgui_events(data.world, &event);
3. Add this to the beginning of your main update: rust let ui = amethyst_imgui::open_frame(state.world); if let Some(ui) = ui { ui.show_demo_window(&mut true); }
4. Add this to the end of your main update: rust if let Some(ui) = ui { amethyst_imgui::close_frame(ui) }