Implements Client Management Endpoints

We already had the R of CRUD, this adds the other 3. The 3 new endpoints require an oauth token with the scope `oauth`. Yo dawg, I heard you like oauth?

@rfk r?
@vladikoff you should take a look and see if there's something I've forgotten that the console will need.

fixes #60 
These two lines of code look pretty confusing to me, so I looked at the Hapi docs. :)

A couple of questions:
* What's the different between a scheme and strategy?
* Have you seen this: https://github.com/johnbrett/hapi-auth-bearer-token?