- Decide about creating a "real" request object during testing.setUp
  vs. creating a dummy request.

- Audit the rest of the docs for "view configuration" and "route
  configuration" references, etc.

- Finish Configurator API documentation.

- set_security_policies as API method?

- add set_response_factory or ctor arg and change hooks chapter.

- add set_traverser or ctor arg and change hooks chapter.

- add set_urlgenerator as ctor arg and change hooks chapter?

- Basic WSGI documentation (pipeline / app / server).

- "Model graph" -> "object graph"?