From "Update LICENSE" (2017-01-13) https://github.com/kiteco/atom-plugin/commit/fc1b1ab6efafcd4...

-The MIT License (MIT)

+Copyright (c) 2017 Manhattan Engineering, Inc - All Rights Reserved

-Copyright (c) 2013-2016 Kite & contributors.

-

-Permission is hereby granted, free of charge, to any person obtaining a copy

[...]

IIRC this is perfectly legal with the MIT license. But legal doesn't mean community friendly or a good idea.

Edit: Ups. I forget:

-The above copyright notice and this permission notice shall be included in all

-copies or substantial portions of the Software.