TODO: Things We Want In Apotomo

• Make setting up a widget tree optional (as Ryan proposed). This means #render_widget and #render_event_response will automatically create the tree based on conventions. Completely optional if you want to use that, or prefer an explicit, maybe more complex, tree.
• rspec-apotomo
• apotomo-stateful
• Maybe use a responder to process events - this would route events to the same URL than the rendering action.