Refactoring of Format::Pg->parse_duration()

Hi All,

I've refactored the parse_duration() method of DateTime::Format::Pg  
so that it's much simpler, and a single Regex supports both ISO and  
Postgres-default duration formats. I added a whole slew of tests  
extracted from the PostgreSQL tests, too. Patch attached.

Best,

David

• Refactoring of Format::Pg->parse_duration() by David Wheeler
• Re: Refactoring of Format::Pg->parse_duration() by Daisuke Maki