Rename packages_es6/* to packages/*.

Now that the incremental ES6ing effort is completed, we can move these
packages back into the packages directory (since all packages are
updated to ES6 now).

Discussed in the core team meeting on 2014-05-19.
added building message to build.js
Merge pull request #4901 from GavinJoyce/gj/build-message

added building message to build.js
Merge pull request #4900 from rjackson/move-back-to-packages

Rename packages_es6/* to packages/*.
Use _states and _state in Ember.CoreView.
Merge pull request #4878 from rjackson/move-view-states

Use _states and _state throughout ember-views.
[DOC Beta] Remove duplicate actions documentation.
Merge pull request #4905 from bmac/remove-duplicate-docs

[DOC Beta] Remove duplicate actions documentation.
[BUGFIX beta] Using {{with controller="blah"}} and preserving context wraps keyword.

Previously, the keyword value available in the template was the raw
unwrapped value  This is correct behavior when you are not using a `controller`,
but with a `controller` the keyword value should be wrapped in the
controller instance.

This refactors the custom `{{with}}` logic out of the general `bind` function, and
adds it into the custom `WithView`.

The tests added in https://github.com/emberjs/ember.js/pull/4894 are all
satisfied, so all the context resolution steps there are still correct.
[BUGFIX beta] Fix `Ember.isArray` on IE8

The previous code couldn't check correctly.

``` javascript
Ember.isArray([]);
//=> false
```
Prevent non-js merge conflicts in Brocfile.js.

Prior to this, a file named `.DS_Store` in both the lib and test
directories of a single package would cause an error during the build.

This doesn't completely fix the issue, but does prevent the majority of
cases that are benign. If we end up having further merge conflicts where
we have a file with the same name in both `lib/` and `test/` dirs we can
address those individually.

This fixes the majority of trivial scenarios for now.
Merge pull request #4910 from rjackson/only-operate-on-js-files

Prevent non-js merge conflicts in Brocfile.js.
Merge pull request #4904 from rjackson/cleanup-withHelper-flag

Using {{with controller="blah"}} and preserving context wraps keyword.
Updates README.md to get rid of old examples
Merge pull request #4912 from machty/renovate-readme

Updates README.md to get rid of old examples
Merge pull request #4909 from tricknotes/fix-Ember.isArray

Fix `Ember.isArray` on IE8
[BUGFIX beta] Fix ember-runtime suites in IE8.
Merge pull request #4913 from rjackson/fix-build-suite-tests-in-ie8

[BUGFIX beta] Fix ember-runtime suites in IE8.
[BUGFIX beta] with-controller cleanup.

Removes unneeded `Ember.get` calls when direct property access would
work properly.
Merge pull request #4914 from rjackson/cleanup-with-controller

[BUGFIX beta] with-controller cleanup.