Prepare for Meteor 0.9's packaging system

I've been using your package as part of a migration to Meteor 0.9 and so I've updated it to work with the new system.

Note that your package was migrated as `mrt:moment@2.6.0` which you will probably want to re-publish as `acreeger:moment@2.6.0` or whatever name you want.

There are still some kinks being worked out; see https://hackpad.com/Migrating-Packages-zN0we9sIjkH and https://meteor.hackpad.com/Unipackage-tvas8pXYMOW#:h=Publishing-a-New-Package.

Let me know if I can help with any issues. The big discussion thread is over at https://groups.google.com/forum/#!topic/meteor-talk/VUaWMwV7aHM.