switch to js file to overcome number/boolean bug, then how to reopen and forward reference a model
simplified access to the child session from the controller based on getting the model.session
one way to add a new object to the list of foos, from another controller, alternatively if we refreshed the model through a relationship it would update it in real time, also, how to handle errors on the then call
never really used
setup controller to get hold of the child session and then the model to hand off to the controller - can also be switched in using the after model hook (from a recent ember build)