doc: Update copyright years; add visible copyright statement.
authorLudovic Courtès <ludo@gnu.org>
Wed, 9 Jan 2013 12:01:48 +0000 (13:01 +0100)
committerLudovic Courtès <ludo@gnu.org>
Wed, 9 Jan 2013 12:01:48 +0000 (13:01 +0100)
commit58db733e6d33dec92a565b4213668ff4527db553
tree9acfd95c61bd080561d3d732f27cc0d5b1a33fab
parentbd5e766b87e6c38a3fe112195a58d23ef59b6f76
doc: Update copyright years; add visible copyright statement.

* doc/guix.texi (YEARS): New variable.
  Use it for all copyright statements.
  (Top): Add a copyright statement and license header here.
doc/guix.texi