Added packaging for MeteorJS.

MeteorJS has now been officially released. I have been using my own private Meteor package for ExtendJS. Now that Meteor has gone v1, there is a push in the community to request that original authors consider directly supporting MeteorJS. This will help ensure a proper version chain, and that new versions are published as soon as they are available.

Once this package file has been merged, you can publish to the Meteor package repository. You can find out more information on publishing here - [Atmosphere - Publishing Packages](https://atmospherejs.com/i/publishing) or here - [Meteor Documentation - Writing Packages](http://docs.meteor.com/#/full/writingpackages).