add binary.createServer(fn) to be more like http.createServer

here's how I intend on using this


    var
      kinect = require('../../index').createStream('depth', null, 2),
      ecstatic = require('ecstatic')(__dirname + '/static');

    require('http').createServer(ecstatic).listen(10000);

    require('binaryjs').createServer(function(conn) {
      kinect.pipe(conn);
    }).listen(10001),