emit close events

i notice you emit a limit event, but IMO you should also emit a close event both on that specific file stream as well as the busboy parser stream to signify the parser has stopped. i use the close event to properly cleanup stuff.

http://nodejs.org/api/stream.html#stream_event_close

the close event should be emitted after the limit event.

[jonathanong]

when there’s a limit event, the data is not “completely consumed” (the data being the underlying source, not busboy), so an end event is not appropriate. in other words, end should only occur when the stream finishes successfully.

[mscdex]

This should be resolved in busboy v1.0.0 and with modern versions of node, which will emit 'close' natively on streams.