Top-level navigation for apps

[jstnhuang]

See if there's a way for apps (within their iframes) to update the URL bar as the user navigates through an app. If a URL is accessed directly, then RWS should pass the data to the app, which can handle it.

Story

• User opens app, URL bar is robot.com/app/code_it
• User opens a CodeIt! program, URL bar is robot.com/app/code_it/1234
• User shares the URL with someone else
• Second user loads that URL. RWS loads CodeIt! and passes the /1234 part of the URL to the app
• The app decides to open program ID 1234