Pause a stream's data events
$ npm install pause
var pause = require('pause')
handle = pause(stream)
Pause the data events on a stream and return a handle to resume or end the stream.
Dispose of the handle. This does not end the stream, but it simply discards
the event collection, making
handle.resume() a no-op.
Resume the stream by re-emitting all the
data events in the same order,
followed by an
end event, if that was emitting during the pause.