[DOC beta] Document Ember.Route #controllerName and #viewName properties.
[BUGFIX beta] Remove false attribute from Ember.View

In IE8 (or older), `jQuery.fn.prop` always update DOM against our
expectation.(This is a jQuery bug but it couldn't fix)
ref: http://bugs.jquery.com/ticket/13558

So the following test is failed due to `view.$().attr('foo')` returns `"false"`.:
* https://github.com/emberjs/ember.js/blob/a449d445/packages/ember-views/tests/views/view/attribute_bindings_test.js#L126

To avoid this issue, `removeAttr` should be called when `null`, `undefined` or `false` is given as value.

But this way contains incompatible changes:

Before:
``` javascript
view.set('checked', false);
view.$().prop('checked'); //=> false
```

After:
``` javascript
view.set('checked', false);
view.$().prop('checked'); //=> undefined
```
[BUGFIX beta] Allow Ember.computed.sort to use property paths in sortDefinitions.

'Ember.computed.sort' 'works only if sortDefinitions contain simple properties.
It will fail if a `sortDefinition` contains a property path (i.e. something
like `person.name`).

A `SearchProxy` is used to shadow the new value of an underlying property with
the old value to ensure proper comparisons take place while searching for an
item in the sorted array. When using a property path rather than a simple
property to sort on, `SearchProxy` will use the actual property path in its
attempt to shadow underlying properties - something like: `{ person.name: 'John
Doe' }`. This causes things to blow up because every comparison between an
existing item `get(itemA, sortProperty)` and a SearchProxy `get(itemB,
sortProperty)` will return a bogus result. In this case, `get(itemB,
'person.name')` will not return the shadowed value (stored as `{ person.name:
'John Doe' } `) but rather the current value of that path on the proxy's
underlying `content`.

This commit allows a proper comparison to take place when a sortDefinition
contains a property path.
[Bugfix beta] improve action without actions hash deprecation warning
Remove a .swp file
Update ember-dev
Use expectAssertion instead of manual assert stubbing
Introduce expectDeprecation. Remove TESTING_DEPRECATION.
[BUGFIX beta] Silently fail when disconnecting from an inactive view
Add documentation for Ember.EnumerableUtils.
Merge pull request #4129 from LevelbossMike/master

Add documentation for Ember.EnumerableUtils.
Merge pull request #4125 from mixonic/disconnect-outlet-without-parent

[BUGFIX beta] Silently fail when disconnecting from an inactive view
Merge pull request #4123 from mixonic/expect

Use new expectDeprecation helper in tests, remove TESTING_DEPRECATION
Merge pull request #4114 from stefanpenner/improve-deprecation-message

[Bugfix beta] improve action without actions hash deprecation warning
Route#disconnectOutlet accepts a string
Merge pull request #4091 from bradfol/disconnectOutlet

Route#disconnectOutlet accepts a string
remove unneeded get
we now have multi-line asserts, lets use them!
Merge pull request #4066 from tricknotes/fix-to-remove-attrs

[BUGFIX beta] Remove false attribute from Ember.View for IE8
Remove `Ember.handleErrors`