Made Changes file conform to CPAN::Changes::Spec and added license and github repo details to Makefile.PL

Hi,

I added the most recent release to your Changes file, and put the release date against both releases (which I got from BackPAN). 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 :-)

I also added your github repo to Makefile.PL along with the license type, so they'll be included in the metadata for your dist.

PS I'm doing this because I'm on a quest to help improve CPAN:

> http://questhub.io/realm/perl/quest/51f0337718ba7d3959000086

Feel free to +1 my quest :-)