[ENH] Add --stop-on-first-crash option
[ENH] Add --stop-on-first-crash option

Nipype's `stop_on_first_crash` option will be `True` by default, except if `-w` is specified. In that case, using the `--stop-on-first-crash` will force it back to `True`.

Closes #850

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