[noise] Go implementation

[Jonathan Rudenberg]

> On Nov 15, 2015, at 1:01 PM, Jonathan Rudenberg <jonathan at titanous.com> wrote:
> 
> I have a basic Go implementation of revision 18 at https://github.com/titanous/noise
> 
> No pipes implementation yet and it’s only tested with the vectors from screech. I’m going to implement the proposed PSK spec on a branch to test next.

PSK implementation is working: https://github.com/titanous/noise/compare/psk