Initial wack at test
Add better labels to tests, reorder
Remove Ember.empty and Ember.none.

These have been deprecated since before 1.0.0, and serve no purpose now.
[Bugfix beta] fix Comparable.compare [fixes #5299 #5060]
Merge pull request #9463 from stefanpenner/fix-comparable

Fix comparable
Merge pull request #9465 from rwjblue/remove-old-deprecated-funcs

Remove Ember.empty and Ember.none.
Mandatory setter checks for configurable.
Merge pull request #9466 from rwjblue/mandatory-setter-uses-configurable

Mandatory setter checks for configurable.
Add test for errors thrown in andThen.
Merge pull request #9470 from rwjblue/add-test-confirming-errors-in-andThen

Add test for errors thrown in andThen.
[BUGFIX beta] First pass at mergedProperties fix for #5182