Copyright for btrfs-tools source package in Trusty

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: btrfs-progs
Upstream-Contact: linux-btrfs@vger.kernel.org
Source: http://git.kernel.org/?p=linux/kernel/git/mason/btrfs-progs.git

Files: *
Copyright: 2007-2012 Oracle 
License: GPL-2+

Files: radix-tree.c
Copyright: 2007-2009 Oracle 
           2001 Momchil Velikov
           2001 Christoph Hellwig
           2005 SGI, Christoph Lameter 
License: GPL-2+

Files: radix-tree.h
Copyright: 2007-2009 Oracle 
           2001 Momchil Velikov
           2001 Christoph Hellwig
License: GPL-2+

Files: debian/*
Copyright: 2007-2012 Daniel Baumann 
License: GPL-2+

License: GPL-2+
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 2 of the License, or
 (at your option) any later version.
 .
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 GNU General Public License for more details.
 .
 You should have received a copy of the GNU General Public License
 along with this program. If not, see .
 .
 The complete text of the GNU General Public License
 can be found in /usr/share/common-licenses/GPL-2 file.