BUG: Make sure tests work in Python 2.5
BUG: Make sure tests work in Python 2.5

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