DOC: simple version of data package install
DOC: simple version of data package install

Step by step instructions mainly for Unix on how to get the data and
template directories into the nipy data paths.

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