Formally endorse initActivitySpinner() in spark_polymer.dart
Slightly improve styling of the dialogs
working on grind deploy
error message for pub get
Merge pull request #547 from sunglim/grind_err_msg

error message for pub get
remove path related function from utils.dart
feedback for remove path patch
Merge pull request #548 from sunglim/remove_path_util

repalce path related functions in utils.dart with 'package:path'
Merge pull request #544 from dart-lang/devoncarew_lines

working on grind deploy
Redo backdrop show/hide in a polymorphic way
Merge pull request #549 from ussuri/follow-up-to-517

Redo backdrop show/hide in a polymorphic way
Got both debugging the uncompiled app and `grind deploy` to work
Address comments
Merge pull request #550 from ussuri/reconcile-debug-and-deploy

Got both debugging the uncompiled app and `grind deploy` to work
Merge branch 'upstream/master'
Merge pull request #551 from ussuri/various-small-fixes

Various small fixes