Reformat change log as per CPAN::Changes::Spec

Hi,

I've reformatted your Changes file according to the spec in `CPAN::Changes::Spec`. Basically, is was just adding the missing date for 3.81 release (2013-05-13, according to [BackPAN](http://backpan.perl.org/authors/id/C/CE/CELOGEEK/)), but I've also added some formatting.

Here's more [clear diff](https://github.com/sergeyromanov/MooX-Options/commit/b7a7509a94b13425b4021f10a44381af09285002?w=1).

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,
Sergey

PS: Why? Read [here](http://questhub.io/realm/perl/quest/51f0337718ba7d3959000086).