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.
Merge pull request #5364 from cibernox/remove_some_multine_var_declarations

Remove some multiline var declarations.
Use jscs for style checking.