Changes file reformatted as per CPAN::Changes::Spec

Hi,

I've reformatted the Changes according to the spec defined in CPAN::Changes::Spec. A large chunk was ok, but the older releases had the date in a different format. I also added dates for 0.03 and 0.04, but noted the differences as 'unknown'. I got the dates from [backpan](http://backpan.perl.org/authors/id/H/HE/HERNAN/).

Following this format means that various tools can more easily process your distribution automatically.

You can find out more about this at Brian Cassidy's [CPAN::Changes Kwalitee Service](http://changes.cpanhq.org), which is where I saw your module listed :-)

Cheers,
Neil