Implement {{content-for 'head'}}.
Merge pull request #2153 from rwjblue/implement-content-for

Implement {{content-for 'head'}}.
Update broccoli-asset-rev.
Merge pull request #2167 from abuiles/update-broccoli-assets-rev

Update broccoli-asset-rev.
Update CHANGELOG.md.

Prepare for 0.0.47.
Use symlinking.
Bump version.
Merge pull request #2125 from stefanpenner/symlinking

WARP SPEED
Fix livereload (with and without CSP).
Merge pull request #2176 from rwjblue/fix-live-reload-with-csp

Fix livereload (with and without CSP).
Update ember-cli-inject-live-reload.

Now properly injects the script tag in a CSP safe way.
Merge pull request #2179 from rwjblue/updates-inject-live-reload-again

Update ember-cli-inject-live-reload.
Update broccoli dependencies to improve performance.

When the current version of broccoli-filter is used with a directory that contains symlinks
(like something from static-compiler or merge-trees), and kitchen-sink-helpers less than 0.2.5
is used, none of the symlinks can use cache (since we are comparing hashes of the symlinks
which are recreated for each built).
Merge pull request #2182 from rwjblue/update-broccoli-deps

Update broccoli dependencies to improve performance.
Fixes 2094 by enabling addon/index.js
Merge pull request #2146 from ef4/fix-2094

Allow `addon/index.js`
Update CSP addon.

Now uses `Content-Security-Policy-Report-Only` by default.
Merge pull request #2190 from rwjblue/make-CSP-report-only-by-default

Update CSP addon.
Allow addons to customize es6 module prefix

Addons can now customize the module prefix they are compiled under:

```js
// index.js

module.exports = {
  name: 'some-addon',
  modulePrefix: 'other-addon'
}
```

Normally addons would use `name` to compile under. If `modulePrefix` is
declared that is used instead.

Use Case!!

During the ember-validations rewrite I've realized that I'd like to have
another library: ember-validations-addons or something to that effect.
It will contain additional validators that don't need to be part of the
original library. (like the URI validator) But I still need to lookup
validators in the `ember-validations` namespace rather than attempting
to manage additional namespaces. This would allow others to also write
their own addons in the same namespace.
Merge pull request #2189 from bcardarella/bc-custom-addon-module-prefixes

Allow addons to customize es6 module prefix