Extracts build functions into a separate package
[BUGFIX canary] Since AutoLocation's use of window.history/location is mostly untestable this refactors the tests so that we make sure #9958, #9956 don't regress again
Ensure ember-testing.js is published with builds.
Merge pull request #9964 from jayphelps/autolocation-regress-prevent

[BUGFIX canary] AutoLocation test refactor to prevent #9956/#9958 from happening again
Merge pull request #9965 from rwjblue/publish-ember-testing

Ensure ember-testing.js is published with builds.
Merge pull request #9796 from twokul/brocfile-tests

Extracts build pipeline into a separate project
Remove flags enabled in stable
Merge pull request #9967 from wagenet/remove-old-flags

Remove old flags from features.json
[DOC release] Added tabindex to Link docs
[DOC release] Documented Evented for Router
Merge pull request #9968 from wagenet/doc-tweaks

Doc Tweaks
brings the comment back
Merge pull request #9974 from twokul/comment-back

brings the comment back
Add `get()` and `context` to debugger helper

* `get` gets a value from a stream based on a path
* The context variable lets users know how to get the context object of
  the template
Merge pull request #9976 from mitchlloyd/enhance-debugger-helper

Add `get()` and `context` to debugger helper
Speed up PR's.

No need to run production build for non-prod tests.
Merge pull request #9972 from rwjblue/speed-up-prs

Speed up PR's.
Fix publish script.
Whitespace cleanup
Decouple Registry from Container

`Registry` is used for stateless factory / option registrations.

`Container` uses a `Registry` to lookup factories and options, and then
instantiates and caches objects.

This decoupling allows for multiple containers to reference a common
registry, which is key to allowing a single Ember app to support multiple
sessions.

`Container` is made backwards compatible by exposing many of its associated
registry's methods.

The concept of subcontainers (i.e. parent / children containers) was
removed as part of this refactoring. It was a legacy feature that's no
longer used within Ember core and has never been publicly documented,
so it's safe to remove without deprecation.