Wait scheduled timers completed
Remove unused
Merge pull request #2620 from tricknotes/remove-unused

Remove unused
Merge pull request #2619 from tricknotes/wait-scheduled-timers

Wait scheduled timers completed
fix DeprecatedContainer

It was correctly emiting deprecation warnings, and invoking the correct
container methods, but was not returning there result;
Merge pull request #2621 from stefanpenner/fix_deprecated_container_with_tests

fix DeprecatedContainer
Ember testing update url in visit helper
Merge pull request #2627 from teddyzeenny/visit-url

Ember testing update url in visit helper
Fix language type
Fix value type

These methods treat `Number` value.
Fix argument name

`decrementProperty` should receive argument as `decrement`.
Fix code comment at `Ember.TextField`

This property is `onEvent`.
Merge pull request #2629 from tricknotes/fix-typo-in-code-comment

Fix typos in code comment