[noise] Test vector format update

[Trevor Perrin]

On Wed, Jun 14, 2017 at 2:43 AM, Alex <alex at centromere.net> wrote:
> In consultation with Rhys, the test vector format[0] has been updated.

Nice, looks great!  Good to see all the PSK tests.

Probably we can remove "hybrid" from the documentation, too?

What do you think we need more test vectors for, at this point?
Failure and fallback cases?  Other areas?

Trevor