BUG: DCMTK was building with TIFF (DCMTK_WITH_TIFF:BOOL=ON) but was finding libtiff on the system and was not using libtiff that was compiled as part of the package. This is because FindTIFF.cmake does not use TIFF_DIR to find the library, but uses TIFF_INCLUDE_DIR and TIFF_LIBRARY. We now set those variables as part of the superbuild process to find the correct version of libtiff and libjpeg is those libraries are built as part of the project.
We also deactivated TIFF and JPEG to build DCTMK. # see CTK github issue #25#