Split up vendor and appliation code.

Generate an `/assets/vendor.js` in addition to `/assets/my-package.js`.

Also, ensures that ES3SafeFilter is only ran on application code AFTER transpiling.
Merge pull request #949 from rjackson/split-vendor-and-app

Split up vendor and appliation code.
Provide EmberApp with registry access.

* Allows customizing registry within `Brocfile.js`.
* Provides registry with `EmberApp` instance.
* Makes each `Plugin` have a `toTree` method. This will allow plugins
  that take a different signature to work properly (assuming they
  implement a custom `toTree`).
* Provides `name` property that is provided to `EmberApp` to plugin.
  This allows the plugin to name the generated output file properly.
Merge pull request #955 from rjackson/fix-css-preprocesors

Provide EmberApp with registry access.
add tested back to bundledDependencies, as we don’t have a underscore dev del

move minimatch up to a dev dependency to not confuse NPM
Ensure that features can be enabled via config/environment.
Merge pull request #958 from rjackson/ensure-features-can-be-enabled

Ensure that features can be enabled via config/environment.
release 0.0.33
Add 0.0.33 to CHANGELOG.
Update CHANGELOG.md
Merge pull request #961 from zigomir/patch-2

Update CHANGELOG.md
relative path fix in prepreocessors.js
Allow opting out of ES3SafeFilter.

We were forced to move the `ES3SafeFilter` step to only operate on
transpiled ES6 output (since it fails on some ES6 module syntax).

Sadly, this means that we are reprocessing the ENTRIE app/ tree for
every rebuild.  Which is **SLOW**!!
Merge pull request #966 from rjackson/allow-opting-out-of-es3safe

Allow opting out of ES3SafeFilter.
Make sure the build traps `SIGINT` and `SIGTERM` for cleanup.
Merge pull request #971 from WMeldon/sigint-trapping

Make sure the build traps `SIGINT` and `SIGTERM` for cleanup.
Provide a --watcher option to allow the user to specify which watcher to use
Use poll flag for sane instead of switching between watchers
Update changelog
Smoke Test Refactor