Add license stanza for DMM.

license.txt

@@ -239,6 +239,33 @@ Files: contrib/ms-sbvar/TZcode/MatlabFiles/qplot2.m
 Copyright: 1997-2012 Clark A. Burdick
 License: GPL-3+
 
+Files: contrib/dmm/*
+Copyright: 2010-2014 European Commission
+           2006-2012 Dynare Team
+License: GPL-3+
+
+Files: contrib/dmm/randlib/*
+Copyright: none
+License: public-domain
+ We place the Randlib code that we have written in the public domain.  
+ .
+                                 NO WARRANTY
+ .    
+     WE PROVIDE ABSOLUTELY  NO WARRANTY  OF ANY  KIND  EITHER  EXPRESSED OR
+     IMPLIED,  INCLUDING BUT   NOT LIMITED TO,  THE  IMPLIED  WARRANTIES OF
+     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK
+     AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS  WITH YOU.  SHOULD
+     THIS PROGRAM PROVE  DEFECTIVE, YOU ASSUME  THE COST  OF  ALL NECESSARY
+     SERVICING, REPAIR OR CORRECTION.
+ .    
+     IN NO  EVENT  SHALL THE UNIVERSITY  OF TEXAS OR  ANY  OF ITS COMPONENT
+     INSTITUTIONS INCLUDING M. D.   ANDERSON HOSPITAL BE LIABLE  TO YOU FOR
+     DAMAGES, INCLUDING ANY  LOST PROFITS, LOST MONIES,   OR OTHER SPECIAL,
+     INCIDENTAL   OR  CONSEQUENTIAL DAMAGES   ARISING   OUT  OF  THE USE OR
+     INABILITY TO USE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA OR
+     ITS ANALYSIS BEING  RENDERED INACCURATE OR  LOSSES SUSTAINED  BY THIRD
+     PARTIES) THE PROGRAM.
+
 License: GFDL-NIV-1.3+
  Permission is granted to copy, distribute and/or modify this document
  under the terms of the GNU Free Documentation License, Version 1.3 or