update iterator example to work with image interface changes
update iterator example to work with image interface changes
bthirion/nipy,alexis-roche/niseg,alexis-roche/register,arokem/nipy,alexis-roche/nipy,alexis-roche/nipy,alexis-roche/register,nipy/nireg,alexis-roche/nipy,alexis-roche/register,arokem/nipy,alexis-roche/niseg,nipy/nipy-labs,alexis-roche/nireg,bthirion/nipy,alexis-roche/nireg,arokem/nipy,bthirion/nipy,nipy/nireg,bthirion/nipy,nipy/nipy-labs,arokem/nipy,alexis-roche/nipy