BF - fix use of make_datasource broken because of change of API in nibabel
BF - fix use of make_datasource broken because of change of API in nibabel

arokem/nipy,alexis-roche/register,alexis-roche/nipy,arokem/nipy,alexis-roche/nipy,alexis-roche/nireg,nipy/nipy-labs,bthirion/nipy,alexis-roche/register,alexis-roche/nipy,alexis-roche/nireg,bthirion/nipy,bthirion/nipy,alexis-roche/nipy,arokem/nipy,alexis-roche/niseg,alexis-roche/register,nipy/nipy-labs,arokem/nipy,nipy/nireg,alexis-roche/niseg,bthirion/nipy,nipy/nireg