update docker file to point at most current commits to my fork of nipype
update docker file to point at most current commits to my fork of nipype

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