I think I would add another sentence or two somewhere in the main README that hint at the specific types of test utility code we provide.

`Specifically, since trapperkeeper handles logging initialization for you, it provides some test utilities that can be used to validate your service's logging.  Also, since trapperkeeper provides a web server for your applications, we provide some test utilities for testing your application in simplified web server container at test time.`

OK, obviously my phrasing is terrible so don't use that as-is :)  But just something that hints at why anyone might want to click through to the links and relates it to the functionality that TK provides.