Tweaked formatting of Changes file

Hi,

I've reformatted your Changes file according to the spec in CPAN::Changes::Spec

 * changed dates to ISO 8601 date format
 * replaced tab characters with spaces 

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