* customElementsReady future. We don't fire Polymer.onReady until custom elements are ready too
* deploy without dart.js by default. This is the expected deployment mode for real apps. Also make sure we test this on DRT and compiler==js, so Pete can change Dartium without causing build breaks :)
* stop using "package:observe" test "performMicrotaskCheckpoint" hack in Polymer. This was too blunt; it affected timing of all async operations. Instead we only trigger Observable.dirtyCheck. It's using the latest Zone API as well.
* mixin ChangeNotifier explicitly. This is mainly to fix a quirk of our test environment (test server loads "packages/polymer" in untransformed mode, causing it to pick up Observable instead of ChangeNotifier).
* fix change watchers to blacklist "attributeChanged" :)
* fix serializeValue to only use the runtime value
* fix deserializeValue to get the right Type for dart:core types
* cleanup prop_attr_reflection_test to use mutation observer
R=blois@google.com, sigmund@google.com
Review URL: https://codereview.chromium.org//29823005
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@28956 260f80e4-7a28-3924-810f-c04153c831b5
jmesserly@google.com