Expand on a hook definition

Just expanded on what a 'hook' was for those that may not be familiar with the terminology. I was thinking of naming a few more hooks such as 'afterModel' or 'beforeModel' but I just picked the three that were shown in the hyperlinked examples. I think people knowing that a hook is an alias for method on a Route object, Controller object, Ember object etc. may cause a lightbulb to come for those thinking what the heck is a 'hook'.