Like plain observables, computed observables now only notify if their value changes. The 'notify' extender or the 'equalityComparer' function can be used to modify this behavior. This change makes both kinds of observables act the same.

Add a new "updated" event for observables (all kinds) that's notified when the observable was updated even if it wasn't changed.
Remove "updated" event.
Replace the static "key" strings used for ko.utils.domData with dynamically generated strings. This saves 385 bytes (83 gzipped).
Merge pull request #394 from knockout/394-computed-equalityComparer

Extend equalityComparer to dependentObservable
Merge pull request #1089 from knockout/domData-name-optimization

Reduce code size by 350+ bytes