[beta] Use documentElement instead of body for ember-extension detection
[FEATURE query-params-new] Normalize full name before trying to check in cache (fixes #4420).

We need to use a normalized version of `fullName` otherwise it will
return always the prototype.

The reason is that that keys are always normalized on the cache, we
end up querying for keys like 'controller:post.index' when it is stored
as 'controller.postsIndex'.
Merge pull request #4433 from abuiles/fix-query-params-controller-or-proto

Fix query params controllerOrProto (fixes #4420)
[DOC beta] Fixes type for `options` arg which should be Object and not String
Merge pull request #4438 from shahrukhomar/docs_fix

[DOC] Fixes type for the `options` arg on Application.register
[DOC beta] Add note about using `{{#with as}}`
[BUGFIX beta] PromiseProxyMixin reset isFulfilled and isRejected

Fixes #4414
Merge pull request #4445 from darkbaby123/promise-proxy-mixin-reset-promise

PromiseProxyMixin reset isFulfilled and isRejected
[DOC beta] Docs for over-riding default behavior in `setupController`
Merge pull request #4446 from bradfol/setup-controller-doc

[DOC beta] Docs for over-riding default behavior in `setupController`
Merge pull request #4440 from bradfol/with-as-doc

[DOC beta] Add note about using `{{#with as}}`
[DOC] Array docs should reference concrete classes
Addresses #4225
Merge pull request #4448 from bradfol/array-proxy

[DOC] Array docs should reference concrete classes
[FEATURE string-parameterize] Revert feature.

During the weekly core team meetings this feature has been determined to
be a better fit for an external plugin.
[FEATURE ember-testing-simple-setup] Revert feature.

During the weekly core team meetings it was decided that while the
intentions were good, this feature is really just covering up the real
issue but not addresing the underlying problem.
Merge pull request #4418 from teddyzeenny/document-element

Use documentElement instead of body for ember-extension detection
Merge pull request #4452 from rjackson/revert-string-parameterize

[FEATURE string-parameterize] Revert feature.
Merge pull request #4453 from rjackson/revert-ember-testing-simple-setup

[FEATURE ember-testing-simple-setup] Revert feature.
Update CHANGELOG for 1.5.0-beta.3.
Remove unused distros from Assetfile.

This takes `rake dist` from 25 seconds to 13 seconds.