angular/angular.js — pull request #2486 by mlarcher (2013-04-23 11:08:34+00:00)
Title: add $includeContentRequested event and pass the element in event data 

Adding a $includeContentRequested event allow us to keep track of how many includes are sent and compare it with how many have finished.
Passing a reference to the element along with the event allows us to know which specifice include we're handling.