add error message for grind
Add Public key to manifest.
Merge branch 'upstream/master'
Addressed comments
Original jobs code (from drake)
Changed the library to spark.app
Added test (changed main to defineTests).
changed comment in jobs.dart
Linted
Merge branch 'upstream/master'
Fleshed out comments.  Clarified parameter name.
WIP: switching to MVC paradigm in Polymer UI

SparkPolymerUI receives a handle to SparkModel, which Spark and SparkPolymer implement. SparkPolymerUI uses the model to map various events in the UI to ActionManager calls, etc.

There is currently a race condition: Spark ctor wants to access various elements of the UI, and so the UI (SparkPolymerUI) gets created too early, before enteredView() fires for various components, leading to a crash in SparkSelector on a null _target.
Merge branch 'upstream/master'
Add assert
Fix unnoticed refactoring artifact
batch resource change events
Merge branch 'master' of https://github.com/dart-lang/spark
renamed libraries
Added copyrights
cleaned up code and added newlines at end of files