This software is distributed under the terms of the GNU General Public
License as published by the Free Software Foundation; either version 2 
or 3 of the License (at your option).

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.

Copies of versions 2 and 3 of the 'GNU General Public License' can be
viewed from within R using 

RShowDoc("GPL-2")
RShowDoc("GPL-3")

or at http://www.r-project.org/Licenses/