Update Ember to 1.5.0 and Ember resolver and handlebars to 1.3.0

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Merge pull request #2564 from hswolff/ember-upgrade

Update Ember to 1.5.0 and Ember resolver and handlebars to 1.3.0
Added fancy fade-in effect and autofocus to the login pages (signin, signup, forgotten, reset).

- Added CSS to implement the fade in effect.
- Added 'autofocus' to the attribute bindings of the TextField so they accept it.