add afterRender event hook to ember views primitive

ember-view-afterrender.js

// create after render view event hook to detect when view is finished loading
// http://mavilein.github.io/javascript/2013/08/01/Ember-JS-After-Render-Event/
// https://github.com/emberjs/ember.js/commit/512327c0128f53d4a0d6828ab38f27c6ccf686ec
Ember.View.reopen({
    didInsertElement: function () {
        this._super();
        Ember.run.scheduleOnce('afterRender', this, this.afterRenderEvent);
    },
    afterRenderEvent: function () {}
});