fix connections, add N4 for SE corrected image
fix connections, add N4 for SE corrected image

oesteban/fmriprep,oesteban/preprocessing-workflow,poldracklab/fmriprep,poldracklab/fmriprep,poldracklab/preprocessing-workflow,oesteban/fmriprep,oesteban/preprocessing-workflow,oesteban/fmriprep,poldracklab/fmriprep,shoshber/fmriprep,shoshber/fmriprep,poldracklab/preprocessing-workflow,chrisfilo/fmriprep