Sindbad~EG File Manager

#through

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Easy way to create a `Stream` that is both `readable` and `writable`. 
Pass in optional `write` and `end` methods. `through` takes care of pause/resume logic.
Use `this.pause()` and `this.resume()` to manage flow.
Check `this.paused` to see current flow state. (write always returns `!this.paused`)

This function is the basis for most of the syncronous streams in 
[event-stream](http://github.com/dominictarr/event-stream).

``` js
var through = require('through')

through(function write(data) {
    this.queue(data) //data *must* not be null
  },
  function end () { //optional
    this.queue(null)
  })
```

Or, can also be used _without_ buffering on pause, use `this.emit('data', data)`,
and this.emit('end')

``` js
var through = require('through')

through(function write(data) {
    this.emit('data', data)
    //this.pause() 
  },
  function end () { //optional
    this.emit('end')
  })
```

## License

MIT / Apache2