Also, fixed up the annotations for tornadoviews to better align with
how narrows was defined as `Iterable[Sequence[str]]` rather than
`List[Tuple[str, str]]`.
django commit 596564e80808 stores the user id in the session as a
string, which broke our code that extracts the user id and compares
it to the id of a UserProfile object.
(imported from commit 99defd7fea96553550fa19e0b2f3e91a1baac123)