show shell output when kd commands fail

[sinan]

create a logger view for kd commands when things go bad. this can be an addition to the LoadingView

[usirin]

I think we can utilize error notification. we can use;

atom.notifications.addFatalError(err.message, { stack: err.stack })

this way people can submit issues for kd commands fails as well.

@sinan wdyt?

[sinan]

addError would be enough I think.