Add moment.js Dependency

[Aukhan]

Hi Jordy,
Would have lost hope in this library if hadnt found this fork,
doesnt seem like the author is really maintaining this anymore,
can one ask for transfer of a repo ?

Anyways I wanted to suggest/ask since you have been through the code, is it possible to add moment.js dependency to this library ?
Custom Formats is the first thing that is in mind which can easily be addressed with moment,
plus moment being a brilliant library may make the addition of some awesome features to this library fairly easy...

thanks for your great work man,
Asad