Add Xommelier::RSS::EmailAddress class
Typecasting extended for Time and Uri types
Support for "Atomic RSS"
Moved, slitghtly modified Atom and RSS functional tests
Parsing, serializing simplified. Fixed setting false data by hashes
Refactored atom:link detecting methods
Fixed, improved OpenSearch parsing and building
DublinCore XML Schemas family
Update version to 0.1.20