Bump to 2.0.11 dev.
Don't crash with invalid timezones.

If a user's browser is sending an invalid timezone string, we shouldn't prevent
them from using Review Board.

Fixes bug 3594.

Reviewed at https://reviews.reviewboard.org/r/6501/
Fix some out-of-order checks in the tests.

We shouldn't index into the outbox before checking the length of it. This
normally isn't a problem, but it can be in the case that other tests aren't
torn down properly.

Testing done: Ran unit tests.