title: busboy-connect fires on finish before the end of save file (node.js , express)
body: <p>I use busboy connect to get the upload data from my client. I try to save the data and then on.finish to return status ok to the server. The problem is that the on.finish fires before the end of the file saving. 
  Have I done something wrong or that's the way the module works?</p>
  
  <p>server-side code :</p>
  
  <pre><code>        console.log("upload started dirname ", __dirname);
          var fstream;
          var result = [];
          var number_of_files = 1;
          req.pipe(req.busboy);
          req.busboy.on('field', function(fieldname, val) {
              field_obj = {}
              field_obj[fieldname] = val;
              result.push(field_obj);
              console.log(field_obj)
          });
          req.busboy.on('file', function(fieldname, file, filename) {
              console.log("Uploading: " + filename);
              //Path where image will be uploaded
              if (result.length &gt; 0) {
                  var file_type = filename.substr(filename.length - 4);
                  filename = result[0].name + '_' + number_of_files + file_type;
                  number_of_files++;
              }
              fstream = fs.createWriteStream(__dirname + "/" + filename);
              file.pipe(fstream);
              fstream.on('close', function() {
                  console.log("Upload Finished of " + filename);
                  result.push(filename);
                  console.log("result ",result)
              });
          });
          req.busboy.on('finish', function() {
              console.log("form parsing finished")
              console.log("result finish",result)
              res.sendStatus(200)
          });
  </code></pre>
  
  <p>I would expect the "result finish" to be the last msg i see , but i get the following on my console:</p>
  
  <pre><code>Uploading: testSwf1.swf
  Uploading: testSwf3.swf
  form parsing finished
  result finish [ { name: '123' }, { clickUrl: '234234' } ]
  Upload Finished of 123_1.swf
  result  [ { name: '123' }, { clickUrl: '234234' }, '123_1.swf' ]
  Upload Finished of 123_2.swf
  result  [ { name: '123' },
    { clickUrl: '234234' },
    '123_1.swf',
    '123_2.swf' ]
  </code></pre>
  
  <p><strong>EDIT</strong>
  i also tried the on.end but that one didn't fired at all.</p>
  
  <pre><code>req.busboy.on('end', function() {
      console.log("DONE PARSING FORM")
      console.log("NEW result finish", result)
  });
  </code></pre>