add create-profile page

[willkg]

django-browserid can create new users. When new user accounts are created, they have wonky names (obviously).

We need to add a page which new users get directed to that lets them set up their profile (first name, last name, etc).

[willkg]

I'm going to punt on this for now until we have more stuff that requires a user page.

For now, I switched it to show user.email rather than user.username.