+ itk::ImageIOFactory seems to work differently and does not need to
RegisterBuiltInFactories any more.
void clitk::RegisterClitkFactories()
{
clitk::DicomRTDoseIOFactory::RegisterOneFactory();
+#if ITK_VERSION_MAJOR <= 3
itk::ImageIOFactory::RegisterBuiltInFactories();
+#endif
clitk::VoxImageIOFactory::RegisterOneFactory();
clitk::VfImageIOFactory::RegisterOneFactory();
clitk::HisImageIOFactory::RegisterOneFactory();