Changelog

[0.1.0] - 2019-07-04

Package ONIX 2.0 and 2.1 DTD files
Package catalog.xml referencing these files
Add Cacofonix::DTDs.xml_catalog_path to point to catalog.xml file location
Add Cacofonix::DTDs.apply_libxml_env! to set XML_CATALOG_FILES ENV and ensure the catalog file is picked up when using a libxml-based XML library like Nokogiri