Log Message:
Update to 3.1. From the changelog:

* added and passed tests for converting HTML entities to Unicode
    equivalents in illformed feeds (aaronsw)
* added and passed tests for converting character entities to
    Unicode equivalents in illformed feeds (aaronsw)
* test for valid parsers when setting XML_AVAILABLE
* make version and encoding available when server returns a 304
* add handlers parameter to pass arbitrary urllib2 handlers (like
    digest auth or proxy support)
* add code to parse username/password out of url and send as basic
    authentication
* expose downloading-related exceptions in bozo_exception (aaronsw)
* added __contains__ method to FeedParserDict (aaronsw)
* added publisher_detail (aaronsw)