turn a pull-stream into a regular node stream.
var toStream = require('pull-stream-to-stream')
//if the pull-stream is duplex (an object with two streams: {source, sink})
stream = toStream(pullDuplex)
//if the stream is a sink ("writable")
stream = toStream.sink(pullSink)
//if the stream is a source ("readable")
stream = toStream.source(pullSource)MIT