-DOC: update year in copyright message


git-svn-id: https://svn.bigr.nl/elastix/trunkpublic@4505 4d348492-3962-11de-aa85-65a2020054a3
ENH: adapt to latest itk 

cherry-picked from the performance branch


git-svn-id: https://svn.bigr.nl/elastix/trunkpublic@4506 4d348492-3962-11de-aa85-65a2020054a3