Create new symbolic links in output directory.

def create_symlinks(d):
    """Create new symbolic links in output directory."""
    data = loadJson(d)
    outDir = prepare_output(d)

    unseen = data["pages"].keys()
    while len(unseen) > 0:
        latest = work = unseen[0]
        while work in unseen:
            unseen.remove(work)
            if "prev" in data["pages"][work]:
                work = data["pages"][work]["prev"]
    print("Latest page: %s" % (latest))

    order = []
    work = latest
    while work in data["pages"]:
        order.extend(data["pages"][work]["images"].values())
        if "prev" in data["pages"][work]:
            work = data["pages"][work]["prev"]
        else:
            work = None
    order.reverse()

    for i, img in enumerate(order):
        os.symlink(os.path.join('..', img), os.path.join(outDir, '%05i_%s' % (i, img)))