** Program 3dConformist reads in a collection of datasets and
   zero pads them to the same size.
** The output volume size is the smallest region that includes
   all datasets (i.e., the minimal covering box).
** If the datasets cannot be processed (e.g., different grid
   spacings), then nothing will happen except for error messages.
** The purpose of this program is to be used in scripts that
   process lots of datasets and needs to make them all conform
   to the same size for collective voxel-wise analyses.
** The input datasets ARE ALTERED (embiggened)! <<<<<<------******