[noise] Noise socket new spec & PoC location

[Alexey Ermishkin]

I moved from NoiseTLS to Noisesocket and created 2 new repos:

1) https://github.com/go-noisesocket/noisesocket/ PoC
2) https://github.com/noisesocket/spec/blob/master/noise_socket.md - Spec

Still working on test vectors & running instance