TODO list for Perl module DateTime::Format::ISO8601

- more docs
- full time only and date only parsers
- group tags
- better expanded format support
- complete 5.4.2 support

Roadmap:

0.05 - more tests
     - complete 5.4.2 support (recursive DT::F::Builder)
0.06 - start ISO8601 section 5.5
0.07 - finish section 5.5 when DT::Duration::Set is finished
