Make package compatible with Meteor 0.9 and its corresponding iron-router version

Resolves #9. Basically followed steps [here](https://hackpad.com/Migrating-Packages-zN0we9sIjkH). 

Specifically:
1. Used mrt to migrate app to new meteor package system format.
2. Updated iron router dependency to use its new name.

I then tested the new package locally in an app and confirmed that it now uses the new iron router package and works without any conflicts in a Meteor 0.9 app.