add api for workspace
add to file api
addressed comments
Converted app buttons to used the Polymer template
Revert "Converted app buttons to used the Polymer template"

This reverts commit b30b30c7be9bb9f78b39886b1641e1d689afc918.
Fixed: double-execution of webkitStartDart() broke polymer-element instantiations.

webkitStartDart() is already invoked by polymer/boot.js, which spark.html includes.
Revert "Fixed: double-execution of webkitStartDart() broke polymer-element instantiations."

This reverts commit 77cfec11555d42515b809f7aa5624dfdbbce4379.
Fixed: double-execution of webkitStartDart() used to break polymer-element instantiations.

webkitStartDart() is already invoked by polymer/boot.js, which spark.html includes.
Merge pull request #38 from dart-lang/workspace

Add api for workspace
tweaks to workspace.dart
Merge pull request #44 from dart-lang/workspace-tweaks

tweaks to workspace.dart
Fixed an editing error.
Temporarily switch to locally fixed polymer/boot.js until the fix makes it to polymer.
Merge pull request #45 from ussuri/locally-fixed-boot-js

Temporarily switch to locally fixed polymer/boot.js until the fix makes it to polymer.
Merge pull request #43 from ussuri/master

Fixed: double-execution of webkitStartDart() used to break polymer-element instantiations.
Switched buttons to polymer version
Merge pull request #46 from ussuri/ui-in-polymer

Switched buttons to polymer version
Move file_util out of git.js
move underscore-min.js and objects module out.

Move out third-party library underscore-min.js : Dart has native support
of underscore.

Move out objects module.
improve failure message for grind.dart