repomd: Suppress warning about unknown compression if NO_COMPRESSION used in fill().
repomd: cr_repomd_xml_dump renamed to: cr_xml_dump_repomd and moved into the xml_dump module.
Repomd: RepomdRecord timestamp, size and size_open switched to gint64 from long.
compression_wrapper: Add cr_ContentStat object.
compression_wrapper: Support for filling cr_ContentStat object.