Move Ember.Application docs into one place so YUIdoc doesn't lose half of it
Merge pull request #2130 from CrowdStrike/doc

Move Ember.Application docs into one place so YUIdoc doesn't lose half of it
Controllers are unwrapped

When a controller is passed to {{action}}, its
model is passed to the target
Move resolution logic to shared file
Unwrap controllers passed to {{linkTo}}