emberjs/ember.js — pull request #2614 by lukemelia (2013-05-01 16:25:03+00:00)
Title: Make parentController available from an itemController

When using the `{{#each}}` helper with itemController specified,
the itemController instances will now have the parentController
set on them. The parentController is the value of the `controller`
keyword when the #each helper executes.