* add dms_cache_factory to store conversion values in persisent storage like flare
To enable it, please update your DMS Preference.
(Preferred Conversion Cache)

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27987 20353a03-c40f-0410-a6d1-a30d3c3de9de