[noise] Test vectors

[Trevor Perrin]

On Sun, Nov 15, 2015 at 7:57 PM, Alex <alex at centromere.net> wrote:
> Attached are test vectors for the *_25519_ChaChaPoly_SHA256 family of
> handshakes. These were generated by cacophony[1] and verified by
> screech.

Nice!  Let me see if I can write a screech tool to consume this format
and automatically execute tests.

We'll need to add a prologue and preshared_key option.  Also, I assume
I can change the initialization keys within the file, not just at the
start?

Trevor