Changes to testem.json

Doesn't run Chrome during CI builds (travis)
Merge pull request #570 from twokul/testem

Changes to testem.json
Use import in test-helpers where possible.
Merge pull request #577 from abuiles/test-imports

Use import in test-helpers where possible.
Update to broccoli 0.10.
Use broccoli's timers for tracking build time.
Merge pull request #578 from rjackson/update-broccoli

Update to Broccoli 0.10.
Swap broccoli-template for broccoli-ember-hbs-template-compiler. Fixes #408
Merge pull request #574 from xtian/precompile-hbs

Add broccoli-ember-hbs-template-compiler. Fixes #408
Update CHANGELOG.md
Add `app.import` to control legacy files, remove broccoli-bower.
better implementation of defaults in `EmberApp`

Lets loader + wrapInEval also be configurable.

We plan soon to make loader configurable via the underlying filter.
Please note, the current setup still does not allow this.