Revert "Merge pull request #2577 from machty/bubbling-controller-events"

This reverts commit 05686ccce26808da4a1e1247b131c68cfba15486, reversing
changes made to 7387d6723b5a20395dfd041a67633a6101c2259d.
Fixed small typo
Merge pull request #2639 from machty/revert-controller-bubbling-actions

Revert "Merge pull request #2577 from machty/bubbling-controller-events"
Removed duplicate test for normalizeTuple
Merge pull request #2641 from intuitivepixel/master

Fixed small typo, and simplified comment.
Merge pull request #2643 from machty/dup-tuple-test

Removed duplicate test for normalizeTuple
Fix docs to use extend instead of create when setting observers
Merge pull request #2648 from teddyzeenny/object-observable

Fix docs to use extend instead of create when setting observers