Copyright for libb2 source package in Xenial

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: libb2
Source: https://blake2.net/

Files: *
Copyright: Written in 2012 by Samuel Neves 
License: CC0
 To the extent possible under law, the author(s) have dedicated all copyright
 and related and neighboring rights to this software to the public domain
 worldwide. This software is distributed without any warranty.
 .
 You should have received a copy of the CC0 Public Domain Dedication along with
 this software. If not, see .

Files: debian/*
Copyright: written in 2013/2014 by Robert Ransom 
License: public-domain
 released to public domain by author