def manifest_to_file_list(manifest_fn):
    """
    Open a manifest file and read it into a list.
    Entries in the list are relative, i.e. no leading
    slash.

    manifest_fn -- the manifest file to read
    """
    image_manifest_list = []
    with open(manifest_fn) as image:
        image_manifest_list = [x[1:] for x in image.read().splitlines()]

    return image_manifest_list