Merge branch 'ace.dart_1.8' into minimap_folding_update
Switched out selection methods for gotoLine().  Still not getting setup for all tabs / files, though
setup a fold listener subscription property and replace the subscription there each time the editor switched tabs.
Revert "TESTING: Local ace.dart package"

This reverts commit 0faae91d834ebb2459d51a7d7d28e7a2ce9d4017.
Updated to 0.2.0 for this branch
Revert "Updated to 0.2.0 for this branch"

This reverts commit 0686063087ec153a3992697dbba22ee3a7cf806e.
Resolved conflict
Removed irrelevant comment
Added backdrop to open folder
Merge branch 'master' of https://github.com/dart-lang/spark into polymer-backdrop_consistency
Merge branch 'master' of https://github.com/dart-lang/spark into polymer-backdrop_consistency
Fixed margins on all dialogs (tested on all except git dependent dialogs)
Added 2px radius to dialogs
Set Radius to 5px and added space to css
Merge branch 'master' of https://github.com/dart-lang/spark into polymer-backdrop_consistency
Made backdrop properties static.  Turned openFolder into a future and setup backdrop to disappear one done (on success)
Changed then() to whenComplete().  Removed traces
Removed code block
completing completer even when no folder is selected (_selectFolder).
Added overrides for open file and new file (and removed catch-all catch).