In anticipation of ITKv4 modularization, all references in
CMakeLists.txt to ITK libraries have been replaced with
${ITK_LIBRARIES}. This change is fully backward compatible with ITKv3.

ITKv4 will change the directory structure of the ITK code base
resulting in many, smaller groups of files. The library names will
change accordingly.

The cmake variable ${ITK_LIBRARIES} has always been available for use
in CMakeLists.txt files, but it was seldolm used. Developers should
start using ${ITK_LIBRARIES} rather than individual library names such
as ITKIO, ITKCommon and ITKStatistics.



git-svn-id: http://svn.slicer.org/Slicer4/trunk@15989 3bd1e089-480b-0410-8dfb-8563597acbee