Load ember-data user object into session after sign-in and initialization

[jakecraige]

We tend to do this in every app as we usually need the actual ED user object. This will involve hooking into all methods that end up signing you in and setting up an initializer that defer's readiness until the user is loaded

[jakecraige]

Dany is working a project right now and he is planning on implementing this into the addon when he gets to that part. Woo!