add more preferences tests
merge to master; change save frequency to 6 seconds
adding editors.dart
Save/restore splitview position (fixed #203)
Add pack index test.
Merge pull request #204 from dinhviethoa/203-prefs-splitview-position

Save/restore splitview position (fixed #203)
merging in CLs; added auto-saving
Addressed comments.
Merge pull request #205 from dart-lang/add_test_for_pack_index

Add pack index test.
add tracking for actions and uncaught exceptions
fix a warning and add a question
Merge pull request #197 from dart-lang/preferences-work

add more preferences tests
cleaning up todos
implement delete file
fixed change tracking issue; added tests
ace nit
Merge branch 'master' into analytics3
change a todo
Merge pull request #207 from dart-lang/workspace-warning

fix a warning and add a question
Merge branch 'master' into analytics3