Add test for Function.prototype.property.
Function.prototype methods should be undefined.
[DOC beta] Reference the guide on Feature Flags.

[ci skip]
Merge pull request #3660 from rjackson/update_features_documentation

[DOC beta] Reference the guide on Feature Flags.
[BUGFIX] Allow keyboard events to work with the action helper.

The way action helper was validating the modifier keys against the
helper's allowedKeys option assumed a mouse/touch event. This commit
changes that to treat mouse/touch events differently.

Fixes #3340
Updated documentation for Ember.Object init method

No need to call ```this._super()``` when extending Ember.Object. Like it says in the "NOTE" :-)
Merge pull request #3666 from hkjorgensen/patch-1

Updated documentation for Ember.Object init method
Use local npm packages for defeatureify.

Update to the latest `ember-dev` which requires `defeatureify` and
`yuidocjs` to be installed locally (previously these were required to be
global).

Also, adds a `package.json` to make installing as simple as `npm install`.
Merge pull request #3663 from lukemelia/keyboard-actions

[BUGFIX] Allow keyboard events to work with the action helper
Merge pull request #3649 from rjackson/add_property_prototype_test

Add test for Function.prototype.property.
[DOC release] Fix template lookup documentation.

The previous documentation suggested that an `Ember.View` could specify
its `templates` property to be used for template lookup instead of using
`Ember.TEMPLATES`.

This fixes the documentation to reflect what we are actually doing for
template lookup.
Merge pull request #3675 from rjackson/use_local_modules

Use local npm packages for defeatureify.
Merge pull request #3648 from rjackson/split_ember_view_core_up

[DOC release] Fix template lookup documentation.
[BUGFIX beta] Bubble `loading` action above pivot route

This is for the `ember-routing-loading-error-substates`
feature. The `loading` action will now always bubble
to `ApplicationRoute`; the logic for preventing substate
entry into a substate above the pivot route has been
moved default action handlers that live "above"
`ApplicationRoute`. /cc krisselden
[FEATURE ember-router-named-substates] Prefer named substates

- When looking for an appropriate substate to enter, the router will
first try and find a loading substate sibling with the name of
router that the error/loading action emanated from, e.g. if foo
route returns a slow promise and both foo_loading and loading
routers have been defined (via route class or template), the
foo_loading substate will be preferred and entered over plain ol'
loading, whereas a slow promise from 'bar' route would enter
the more generalized 'loading' route (assuming 'bar_loading' route
wasn't defined)

- Top-level error/loading substates can now be entered. They are
top-level, which means they get rendered as siblings to
ApplicationView vs within ApplicationView's outlet. This
handles slow/rejecting promises returned from ApplicationRoute.
If a route class/template corresponding to 'application_error'
or 'application_loading' is found, it will be entered. This
may seem like a special-casing of the substate naming conventions,
but is actually consistent with the useful rule established in
(2) above: Ember will say "ok, slow/rejecting promise came from
the 'application' route, let's check if a specifically named
'error' or 'loading' substate exists for it and enter it if so".
The only special-casing is that it won't go to the second step
of generalizing and looking for routes named specifically
'loading'/'error' to enter, since that corresponds to child
substates of the internal this.resource('application')