finish up work to implement vim and emacs key bindings
merge to master
merge to master; upgrade ace
re-order context menu items
Fixed getAbsolutePosition() result
Context menu: visual UI cleanup. Fixed context menu multiple selection management.
Merge pull request #306 from dinhviethoa/277-context-menu-work

Clean context menu UI and handle multiple selection (fixed #277).
Build version 0.0.15
Merge pull request #283 from dart-lang/keybinding2

Keybinding2