Update CHANGELOG for 1.6.0-beta.5.
[BUGFIX beta] Fix auto location test for old browser

Stub `AutoLocation._getSupportsHistory` to test `AutoLocation`
behavior on hash location.
This stub is needed on old browser such as IE8.
[BUGFIX beta] Fix `DataAdapter#getModelTypes()` to return Ember.Array
[BUGFIX beta] Prevent error in LOG_RESOLVER during unit testing.

When using `ember-qunit` to unit test a component, an error is thrown
since there is no `root` object (i.e. no application is booted).
Re-enable ember-runtime build target

The pre-broccoli build system produced `ember-runtime.js`, which I
depend on to interact with `Ember.Object` based models in node. It seems
it was dropped in the switch to broccoli.

This change reintroduces it.
Publish ember-runtime.js for builds.
Merge pull request #4945 from tricknotes/fix-array

[BUGFIX beta] Fix `DataAdapter#getModelTypes()` to return Ember.Array
Merge pull request #4931 from tricknotes/fix-auto-location-test

[BUGFIX beta] Fix auto location test for old browser
Merge pull request #4955 from rjackson/generate-ember-runtime

Generate and publish ember-runtime.js.
Merge pull request #4950 from rjackson/allow-null-root-for-log-resolver

[BUGFIX beta] Prevent error in LOG_RESOLVER during unit testing.
[FEATURE ember-metal-computed-empty-array] Remove flags.
[FEATURE ember-runtime-test-friendly-promises] Remove flags.
[FEATURE ember-routing-add-model-option] Remove flags.
Merge pull request #4960 from rjackson/remove-feature-flags-for-beta-features

Remove feature flags for features in 1.6.0.
Fix removeDependentKeys comments

TODO: DRY up add/removeDependentKeys?
[BUGFIX beta] Log all rejections from transition.

Prior to this any rejection other than `UnrecognizedURLError` was being
completely ignored.
Merge pull request #4968 from rjackson/spit-dont-swallow

[BUGFIX beta] Log all rejections from transition.
Clean up some ember-metal chains code

1. The first change removes a weird instance of 
   improperly removing nodes from an array which
   would break in case there’s every a time that
   a node appears in the array more than once
   (but I’m pretty certain this is never the case)
2. Removed unnecessary .length check of 
   (str && str.length > 0)
Remove old/unused JSHint reporter.

This is handled by `broccoli-jshint` now, and is no longer used.
Fix spelling error.