The bcbio running time frame.

    :return:    an instance of :class collections.namedtuple:
                with the following fields: start and end

def log_time_frame(bcbio_log):
    """The bcbio running time frame.

    :return:    an instance of :class collections.namedtuple:
                with the following fields: start and end
    """
    output = collections.namedtuple("Time", ["start", "end", "steps"])
    bcbio_timings = get_bcbio_timings(bcbio_log)
    return output(min(bcbio_timings), max(bcbio_timings), bcbio_timings)