Buffer a stream and return a buffered stream

buffer-streams.js

function BufferStream(stream, options) {
    var bufferWritable = PauseStream().pause()
        , bufferReadable = through()
        , bufferStream = duplex(bufferWritable, bufferReadable)

    bufferReadable.pipe(stream).pipe(bufferWritable)

    stream.on("error", reemit)

    return bufferStream

    function reemit(err) {
        bufferStream.emit("error", err)
    }
}