title: dropzone.js and ajax call = empty $_FILE, $_POST
body: <p>I am trying to send form variables to PHP via AJAX and show the result in <code>console.log</code>. But the console shows always no value for data. I don´t know what's wrong. What I have so far:</p>
  
  <p><strong>Part of jQuery Code:</strong></p>
  
  <pre><code>...
  init: function() {
      this.on('success', function(csvFile, json) {
          // AJAX 
          $.ajax({
              url : "tests.php",
              type : "POST",
              data : this.csvFile
          }).done(function (data) {
              // Bei Erfolg
              console.log("Erfolgreich:" + data);
          }).fail(function() {
              // Bei Fehler
              console.log("Fehler!");
          }).always(function() {
              // Immer
              console.log("Beendet!");
          });
      });
  </code></pre>
  
  <p><strong>Part of HTML Code:</strong></p>
  
  <pre><code>&lt;form action="tests.php" class="dropzone" id="myAwesomeDropzone"&gt;
      &lt;input type="text" name="testname" value="das bin ich"/&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p><strong>PHP Code:</strong></p>
  
  <pre><code>if(!empty($_FILES)){
      $test = $_FILES['file']['tmp_name'];
      echo test;
  }
  
  if(!empty($_POST)){
      $test2 = $_POST['testname'];
      echo $test2;
  }
  </code></pre>