mtlognorm: Adding support for 3d (or lower) input images
mtlognorm: Adding support for 3d (or lower) input images

* Elevate all input images to 4d via replicate adapter

MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3