Adding support for teams 

Trying to add support for teams so we can actually use this with Shopify repo. This isn't actually working yet, there is an error somewhere and I have no idea where.

@tylermercier can you take a look, I hear you know something about ember.js. I'm not sure if what I'm doing makes sense, been trying to copy from existing code related to issues/milestones to try and get something working.

@Thibaut you might understand this stuff as well, mind taking a look?

cc @sayeaud 
I had these show up in my rebuilt `application.js` as well, and it broke when trying to view the card for an issue. I had to upgrade the `ember-template-compiler.js` file inside `ember-tools`, which then made it rebuild identical to upstream.