edge case when write is called after pipe, but in the same tick.

[dominictarr]

what if there is a write to the buffered stream later in the same tick as it has been piped, but before it has emitted it's chunks.
those chunks will be written out of order.

var b = new (require('morestreams').BufferedStream)()

b.write('1\n')
b.write('2\n')
b.write('3\n')
b.pipe(process.stdout, {end: false})
b.write('4\n')
b.write('5\n')
b.write('6\n')

gives output:

4
5
6
1
2
3

I think that it is correct to emit the chunks in the next tick, but incoming writes should be buffered until the buffered chunks have been emitted.