Added missing dates to Changes to satisfy CPAN::Changes::Spec

Hi,

I've added missing dates for releases to your Changes file. I got the dates from [BackPAN](http://backpan.perl.org/authors/id/K/KA/KARUPA/). This makes your Changes file satisfy CPAN::Changes::Spec.

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

PS I'm doing this because I'm on a quest to help improve CPAN:

> http://questhub.io/realm/perl/quest/51f0337718ba7d3959000086

You can give me a +1 on the quest if you like :-)