Reformatted Changes file as per CPAN::Changes::Spec

Hi,

I've reformatted your Changes file to conform to CPAN::Changes::Spec:

  * dates are in ISO 8601 date format
  * most recent release first
  * consistent formatting of bullets for every release
  * added dates for the releases that were missing them (dates got from [BackPAN](http://backpan.perl.org/authors/id/I/IN/INTERMINE/))

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