made cmake 2.6 compatible
made cmake 2.6 compatible

petricm/LCIO,iLCSoft/LCIO,petricm/LCIO,iLCSoft/LCIO,petricm/LCIO,petricm/LCIO,iLCSoft/LCIO,petricm/LCIO,iLCSoft/LCIO,iLCSoft/LCIO,petricm/LCIO,iLCSoft/LCIO