(dictionary of 'name', 'url', 'email'); map author to author_detail if author contains name + email address
3.0b6
will be one of SUPPORTED_VERSIONS.keys() or empty string if unrecognized; added support for creativeCommons:license and cc:license; added support for full Atom content model in title, tagline, info, copyright, summary; fixed bug with gzip encoding (not always telling server we support it when we do)