0.02_02
    - Update dep on KiokuDB

0.02_01
    - Use Directory::Transactional to provide transaction support

0.01 (JSPON 0.06)
    - Rename to KiokuDB::Backend::Files
    - add 'create' attribute
    - switch to Serialize::Delegate
    - add trie support

0.05
    - Depend on a more recent IO (binmode method is missing in older ones)
    - Refactor JSON handling and move to KiokuDB core

0.04
    - update test suite to not use KiokuDB::Resolver