Hidden APIs should be documented

This is most necessary for features where something happens automatically behind the scenes by default, but has a hidden API for disabling (where there might be a reason to disable it).

The best example is **can.Model** which automatically converts the responses of findOne/findAll to model instances. In a recent version of can (1.1.5 or so), create/update also started converting by default. You can only override these behaviors by using a non-obvious hidden API: Setting makeFindAll/makeFindOne/makeCreate/makeUpdate as null. While the existing design for this functionality could probably use some refactoring, in the meantime we should document the hidden APIs.