Default to development asset.
Add findWithAssert helper to tests/.jshintrc
allow style preprocessors to pass options
add style-plugin unit tests
Do not watch the same directory more than once.
Merge pull request #1212 from rjackson/do-not-attempt-to-watch-the-same-dir

Do not watch the same directory more than once.
implement a postBuild hook in the builder addons can use to run arbitrary code after each build
Remove dev-deps from runtime deps.

I do not think the following should be dependencies in our `package.json`
as they are used for the development of Ember CLI itself, but not used by
consuming applications.
Merge pull request #1217 from rjackson/reduce-runtime-deps

Remove dev-deps from runtime deps.
Merge pull request #1215 from jakecraige/feature/addon_build_hooks

Add addon.postBuild hook
Add addon.postprocessTree.

This hook allows any addon to hook into the final stage of the `toTree`
process. Making things like `broccoli-uglify` and `broccoli-asset-rev` able
to be addons and not need to live in the core of EmberCLI.

Also:

* Allows additional trees to be passed to `app.toTree`. Creating
  additional trees in the application `Brocfile.js` and merging them
  with the result of `toTree` is pretty common. Unfortunately, this
  means that any additional assets you have added will not be available
  for the post processing in addons. For example, any assets you add
  this way will never be fingerprinted.
* As the addon API develops it is odd that `included` and `treeFor` are
  required to be implemented since many plugins will never interact with
  the `EmberApp` stuff (for commands, preprocessors, middlewares,
  blueprints (soon), etc). This PR removes the errors from being thrown.
* Adds `broccoli-asset-rev` as an application dependency for newly
  blueprinted apps.
Merge pull request #1214 from rjackson/allow-addons-to-postprocess

Add addon.postprocessTree.
Correct Spelling Mistakes in ARCHITECTURE.md
Merge pull request #1220 from jherdman/correct-spelling-mistake

Correct Spelling Mistakes in ARCHITECTURE.md
Ensure that JSHint is done after preprocessors.

JSHint will not attempt to read/process `*.coffee` files for example.

Would also be an issue when using sweet-js macros (as they may appear to
be invalid).
Merge pull request #1221 from rjackson/fix-hinting-for-coffeescript

Ensure that JSHint is done after preprocessors.
Allow addons to add blueprints.
Allow blueprints to export an object.

This allows blueprints from addons to have access to all of the internal
inherited functions from the EmberCLI `Blueprint` class without having
to have `ember-cli` as a dependency.

Also, make `addon.blueprintPaths` a function.
Refactor `ember update`.

* remove ad-hoc code
* create UpdateChecker model
* ensure all branches are possible
* don’t use rewire
Merge pull request #1195 from stefanpenner/begin-fixing-update-checker

Refactor `ember update` command.