Upgrade dependencies incl. Ember 2.14

[bjornharrtell]

Appears to be working fine except the virtual repeat.

Remaining tasks:

• Fix lint problems
• Fix "Assertion Failed: Cannot call get with 'options' on an undefined object." in the virtual repeat sample
• Fix qunitjs upgrade issues

[bjornharrtell]

Ready for review.

[bjornharrtell]

Forgot to check qunit issues. Will do so and return with a new reviewable state.

[bjornharrtell]

Hit by the qunit issue as fixed/described by #694 only this time it does not appear to help to pin the qunitjs version. :(

[bjornharrtell]

I just now noticed that running a failing test in isolation makes it pass.

[bjornharrtell]

Think I've found the test case issue and fixed it. The Ember beta build fails at CI but I suspect it has nothing to do with this PR.

[bjornharrtell]

Rebased. CI fails completely but I don't understand why, it seems it's not using the .travis.yml that's in this branch (unchanged from master).

[bjornharrtell]

Rebased again. Still failing at CI but it runs as expected, failure is with ember-beta which is the same on the master branch.

[bjornharrtell]

Rebased and squashed.

[miguelcobain]

beta and canary are expected to fail. It's an upstream problem.
Thanks for this. Will merge once tests finish running.