Move application to /app

* Protect /app and /api with Raven.
* Simple initial welcome page.
* Delete previous LoginController.
* Move JS files to /web
Use absolute URL for loading the Ext JS App namespace.
Don't use custom reader for the Session model
Update container test data to be more representative
Merge pull request #3 from littlerobot/move-to-slash-app

Move application to /app