add t1 to mni and epi to t1 overlays to config.json
add t1 to mni and epi to t1 overlays to config.json

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