Pass index into computed array callbacks
Use one variable assignment per declaration.
Add missing tests for Ember.DAG

I am not sure sure hoy to tag fixing the absence of tests.
Merge pull request #5354 from cibernox/test_ember_dag

Add missing tests for Ember.DAG
Merge pull request #5351 from rwjblue/single-line-var-declarations

Use one variable assignment per declaration.
Ensure that variable assigning declarations are single line
Merge pull request #5355 from rwjblue/metal-single-line-assigning-declarations

Ensure that variable assigning declarations are single line
ember-runtime single var assignment per declaration

I am working through a code style cleanup effort using
[jscs](https://github.com/mdevils/node-jscs) rules.

You can see the script and rules in:
https://github.com/rwjblue/ember.js/compare/code-style-rules
Merge pull request #5356 from rwjblue/single-line-var-runtime

ember-runtime single var assignment per declaration
ember-application single var assignment per declaration
Merge pull request #5357 from rwjblue/single-var-line-ember-application

ember-application single var assignment per declaration
[BUGFIX beta]

In 1.6 Ember.computed.empty was updated to
automatically respect arrays without forcing
users to use array.[] as the dependent key.

Ember.computed.notEmpty was not updated.

This commit fixes that.
Merge pull request #5361 from jeffreybiles/computed-not-empty-array-does-not-require-brackets

[BUGFIX beta] Computed not empty array does not require brackets
Remove some multiline var declarations.

Conflicts:
	packages/ember-application/lib/ext/controller.js
	packages/ember-application/tests/system/initializers_test.js
	packages/ember-handlebars-compiler/tests/precompile_type_test.js
Make vendored packages ES3-safe.
Merge pull request #5367 from rwjblue/make-vendored-trees-es3-safe

Make vendored packages ES3-safe.
Document the Router.map function.
Merge pull request #5364 from cibernox/remove_some_multine_var_declarations

Remove some multiline var declarations.
Replace multiline variable assignments.

* ember-handlebars
* ember-extension-support
* ember-debug
Merge pull request #5368 from wbyoung/document-map

Document the Router.map function.