Fix pusher to work with new ember-data
Fix pusher to work with new ember-data

This commit just fixes things to the point where pusher updates are
applied to the store properly. This still lacks a business logic fixes,
so for example we won't update lastBuild's field, because there's no
such information from pusher.

2947721120/travis-web,2947721120/travis-web,2947721120/travis-web,fauxton/travis-web,fotinakis/travis-web,travis-ci/travis-web,fauxton/travis-web,travis-ci/travis-web,2947721120/travis-web,travis-ci/travis-web,fotinakis/travis-web,fotinakis/travis-web,fauxton/travis-web,travis-ci/travis-web,fauxton/travis-web,fotinakis/travis-web