Upgraded to polymer 0.10.0-pre.1 & analyzer 0.13.0-dev.4 + adjusted analyzer.dart
Removed 'browser' from dependencies as well
Fixed SparkMenuButton.toggle signature: crashed with latest polymer
Fine-tuned focus management in SparkOverlay: crashed with latest polymer
Addressed a nit
Pin/override analyzer version to the working 0.13.0-dev.5
Rename a method
Rename handlers
Merge pull request #1272 from ussuri/upgrade-polymer-and-analyzer

Upgraded to polymer 0.10.0-pre.1 & analyzer 0.13.0-dev.4 + adjusted analyzer.dart