Updated upload

[topless]

In first place indentation is not correct and second I am not really sure that ", false" is needed.

[topless]

Or it could simple become

xhr.upload.addEventListener 'progress', (event) ->
  progress(parseInt(event.loaded / event.total * 100.0))
, false

Which will have the same outcome as now, only it would be properly indented so the linter doesn't complain.

[lipis]

It's the last param of the addEventListener which is the useCapture.. more details can be found on StackOverlfow or here: EventTarget.addEventListener

So the false is actually not needed there because is the default..