Update to RSVP 3.0.6.
Update to RSVP 3.0.6.

Adds `allSettled` and `hashSettled`.

Full compare listing: https://github.com/tildeio/rsvp.js/compare/3.0.3...3.0.6.

mmpestorich/ember.js,mmpestorich/ember.js,mmpestorich/ember.js