Update to Ember 1.9.0.

No Issue
- Ember@1.9.0
- Handlebars@2.0.0
- grunt-ember-templates@0.5.0-alpha
Prevent publish-bar from floating up
Merge pull request #4526 from knownasilya/patch-1

Prevent publish-bar from floating up on mobile
stop middleware converting favicon to string

closes #4658

- adds conditional to prevent favicon being processed as a string
Merge pull request #4661 from cobbspur/favicon

stop middleware converting favicon to string
Merge pull request #4620 from jaswilli/ember19

Update to Ember 1.9.0.