add disclaimer to CMakeList.txt and .cmake files

add the folowing diclaimer : 

######################################################################
#
# 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.
#
#######################################################################

at the begeinning of CMakeList.txt and .cmake files.

exept for : 
- cmake/GetGitRevisionDescription.cmake
-  src-plugins/cmake/FindDCMTK.cmake 
-   src-plugins/cmake/FindQtDCM.cmake 
-  src-plugins/cmake/GetGitRevisionDescription.cmake 
-  src-plugins/libs/vtkInria/CMakeModules/AddPch.cmake 
-  src-plugins/libs/vtkInria/vtkDataManagement/ModuleConfig.cmake 

Where disclaimers already exist.