feature: include full path in manifest

[dawaltconley]

would like to suggest / add an option to include the full directory path of the output files in the manifest. afaik this is just a matter of passing the full path rather than the base name in the following function

function data(originalName, hashedName, opts) {
    var key = path.parse(originalName).base;
    var value = path.parse(hashedName).base;

    return opts.updateEntry(originalName, hashedName);
}

This could be toggled using a fullPath boolean option?

Also curious about the status of this repo, as it's only on v2.0.0 while the npm package is on v3.0.0.