Put in hooks for integration testing systems

[ianb]

Systems like Jenkins (or more specific, stuff like jstestnet or whatever it is called) need to be able to tell if the test passes, without necessarily caring about the details. A reporter hook of some kind would be helpful.

This might take the form of postMessage hook, or a <script> tag that gets injected or something that defines some specific functions that get called as part of the test.

[ianb]

I guess I unwittingly have some (looking for _hook) but they need to be documented.