keybindings
Merge branch 'master' into devoncarew_more_bindings
more key bindings
Merge branch 'master' into devoncarew_more_bindings
fix issue with tab close
refactor bindings code
Removed code to check for column and replaced with ace.dart (Document).
Merge pull request #852 from dart-lang/devoncarew_more_bindings

Devoncarew more bindings
Merge branch 'master' of https://github.com/dart-lang/spark into umop-annotations-find_column