Feedparser

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* Added 'rights' to list of elements that can contain dangerous markup
* Fiddled with decodeEntities (not right)
* Liberalized date parsing even further

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* Incorporated ISO-8601 date parsing routines from xml.util.iso8601

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* Fixed check for presence of dict function
* Added support for summary

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* Added support for contributor

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* Support Atom-style author element in author_detail (dictionary of 'name', 'url', 'email')
* Map author to author_detail if author contains name + email address

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* Added feed type and version detection, result['version'] 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)