Updating the unit tests so that they all pass again.

* Adding checks for all expected navigator.id based functions.
* pick_email.js - Get rid of the "remember" tests
* state.js - Check that authenticated redirects off to "email_chosen"
* user.js - get rid of the setPersistentSignin, change removePersistentSignin to logout.
* xhr.js - Look in the stringified JSON for the csrf token.