Connexions/webview — pull request #477 by philschatz (2014-04-30 21:07:18+00:00)
Title: WIP: Add banner when remote changes occur

Something like "This content has been changed. Please refresh the page"

TODO:

- [x] test that the polling stops when the current page or book changes
- [ ] test with a version of `cnx-authoring` that supports ETags
- [ ] add the banner div instead of an alert