docs(licence): automatically set licence info in setup.py template

close: #116
close: #94

cubicweb/skeleton/setup.py.tmpl

 #!/usr/bin/env python
 # pylint: disable=W0142,W0403,W0404,W0613,W0622,W0622,W0704,R0904,C0103,E0611
 #
-# copyright 2003-2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
-# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+# copyright %(year)s %(author)s, all rights reserved.
+# contact %(author-web-site)s -- mailto:%(author-email)s
 #
 # This file is part of a %(distname)s.
 #
-# CubicWeb is free software: you can redistribute it and/or modify it under the
-# terms of the GNU Lesser General Public License as published by the Free
-# Software Foundation, either version 2.1 of the License, or (at your option)
-# any later version.
-#
-# CubicWeb 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 Lesser General Public License for more
-# details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
+%(long-license)s
 """cubicweb_%(cubename)s setup module using data from
 cubicweb_%(cubename)s/__pkginfo__.py file
 """