Add ember-disable-prototype-extensions to addons by default.

[rwjblue]

Add here: https://github.com/rwjblue/ember-disable-prototype-extensions

Basically, just adds window.EmberENV.EXTEND_PROTOTYPES = false; before Ember is loaded.

Fixes #3443.

[runspired]

So this snuck past me on the package.json diff and ended up biting me pretty hard tonight. The errors you get when you aren't looking for this are pretty cryptic, and I only figured this out because I'd read some of the discussion that this was coming, I didn't realize it was landing.

Most of the conversions are simple (I didn't have enough of them to need to use the Watson tool for this guy) http://guides.emberjs.com/v1.10.0/configuring-ember/disabling-prototype-extensions/

But I don't see a clear way to replace .on.

[rwjblue]

@runspired:

import Ember from 'ember';
var on = Ember.on;

export default Ember.Component.extend({
  doStuffWhenInserted: on('didInsertElement', function() {
    /* awesome sauce */
  });
})

[rwjblue]

Submitted a pull request to the guides for this: emberjs/guides#156

[runspired]

Awesome! Thanks.