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Add notification
temporary disable since it incurs much overhead
Add default menu in OSX to support copy and paste.

In OSX, Cmd+C/V is not supported if there's no default menus.
By attaching these menus, we can support Cmd-Q, C, V, etc.
It is supported since v0.10.0-rc1, so, node-webkit update PR is needed
to work it correctly.
notification update
Merge branch 'custom-heavy' of github.com:Constellation/komanda into custom-heavy