Dist enhancements

Hi,

I've reformatted your Changes file according to the spec in `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 :-)

Some release dates were missing, I got them from [BackPan](http://backpan.perl.org/). I also added a link to the GitHub repository into Makefile.PL, so it would be easy to find the repo from [MetaCPAN](http://metacpan.org).

Cheers,
Sergey

PS: I'm doing this because I'm on a quest to help improve CPAN. Read more about [the quest](http://questhub.io/realm/perl/quest/51f0337718ba7d3959000086) at [Questhub](http://questhub.io).
If you decide to update your other dists, feel free to log them in comments on the quest -- every dist helps!