Add a way to delete all the data for a given user.
Allow running the integration test against a remote server.

If the environment variable TEST_REMOTE is specified, it is interpreted
as the base url of a remote server to be tested.  Integration tests will
send their requests to that server rather than injecting them into a
local Hapi server instance.
Use randomly-generated auth tokens for testing purposes.
Refactor bindMakeRequest and friends into a TestClient class.