Update bundled libraries to Ember Data 0.13
Fix pagination to work with Ember Data 0.13
Change adapter to use RSVP for ajax calls.
Fix tests to work with Ember Data 0.13.

When running the tests I needed to wrap most calls to the store in
Ember.run calls, otherwise they would execute too late. There may be a
better way to fix it.
Merge pull request #24 from olofsj/ember-data-0.13-fixes

Ember data 0.13 fixes