Adding prepareForLinking to mock to remove warning.
Merge pull request #2684 from dart-lang/umop-linking-analyze_on_load-warning

Adding prepareForLinking to mock to remove warning.
Updated docs
fix a failing jobs test
Merge pull request #2688 from devoncarew/devoncarew_fix_jobs_test

fix a failing jobs test
Fix path to polymer.html in spark_widget.html
Merge remote-tracking branch 'upstream/master' into polymer-0.11.0
Fix: programmatically set `animation` in spark-dialog wasn't seen by spark-overlay's CSS