Set the status endpoint on ScraperWiki to the latest entry e.g.
    'Latest entry: 2013-10-01'

def update_status(table_name="swdata", date_column="date"):
    """
    Set the status endpoint on ScraperWiki to the latest entry e.g.
    'Latest entry: 2013-10-01'
    """
    status_text = 'Latest entry: {}'.format(
        _get_most_recent_record(table_name, date_column))
    L.info(status_text)

    scraperwiki.status('ok', status_text)