Trying out how to get things working with Ember, provided that data
is already there. Using fixtures to provide the data for now and
seeing how to do the UI based on that.
Projects expander and view with fixture data.
With own serializer and adapter the ember app now gets values from
backend nicely. No actions to the other direction yet.
Send updated model state on freeze/thaw operations back. Updated tests
to match.

See https://trello.com/c/GMxmxxGL/71-on-freeze-thaw-on-server-send-back-updated-model-state.

Also, some tests were broken due to earlier url -> id changes, fixed
those too.
Freezing and thawing from UI work.

Found some bugs, see:

* https://trello.com/c/iNhbvAwg/74-update-so-that-project-isn-t-in-frozen-state-until-all-saved-instances-have-actually-stopped
* https://trello.com/c/scwcSa5q/75-update-so-that-project-isn-t-in-running-state-until-all-thawed-instances-are-actually-running

Also, can't figure out why Ember Data isn't updating stateChanged field
even when reload() on network level shows that the updated value is
sent -- yet the "state" field is handled correctly. Doh.
Figured out stateChanged field problem. Developer error.

Changed stateChanged to stateUpdated during debugging, and actually
like the new name a lot better than the old one, so stuck with that.