Update Ember to 1.9.1.

http://emberjs.com/blog/2014/12/23/ember-1-9-1-released.html
Merge pull request #2215 from rwjblue/update-ember

Update Ember to 1.9.1.
Merge pull request #2213 from blesh/master

add RxJS libraries
Fix up subscription data & cancel
3.25.4
merge fuckup
3.25.5