Add meaningful documentation for the image.header.
Add meaningful documentation for the image.header.
arokem/nipy,alexis-roche/niseg,nipy/nireg,alexis-roche/nipy,alexis-roche/nireg,nipy/nipy-labs,bthirion/nipy,alexis-roche/register,arokem/nipy,alexis-roche/nipy,bthirion/nipy,bthirion/nipy,alexis-roche/nipy,nipy/nipy-labs,bthirion/nipy,alexis-roche/nireg,alexis-roche/nipy,alexis-roche/niseg,alexis-roche/register,alexis-roche/register,arokem/nipy,arokem/nipy,nipy/nireg