language, user properties from parent feed node. Note: Signatures of
  FeedsProcessor::map(), existingItemId(), FeedsParser::getSourceElement()
  changed.

directly in the textfield rather than uploading them through the UI, you will
have to adjust your importer's File Fetcher settings.

Throw appropriate errors. Add an @ to suppress debug output when SimpleXMLElement constructor encounters problem. Output exception message (on FeedsSource level) instead.