CMake disclaimer.

add the folowing diclaimer : 

<pre>
######################################################################
#
# medInria
#
# Copyright (c) INRIA 2013. All rights reserved.
# See LICENSE.txt for details.
# 
#  This software is distributed WITHOUT ANY WARRANTY; without even
#  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
#  PURPOSE.
#
#######################################################################
</pre>
at the begeinning of CMakeList.txt and .cmake files.