BF: deal with spaces in paths for script arguments
BF: deal with spaces in paths for script arguments

Windows temporary directory names revealed the problem.

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