title: Steps wizard and parsley not validating
body: <p>i have jquery steps function for my form in wizard.js file</p>
  
  <pre><code>$("#wizard-validate").steps({
      headerTag: ".wizard-title",
      bodyTag: ".wizard-container",
      transitionEffect: "fade",
      onStepChanging: function (event, currentIndex, newIndex) {
          if (currentIndex &gt; newIndex) {
              return true;
          }
          if (newIndex === 3 &amp;&amp; Number($("#age-2").val()) &lt; 18) {
              return false;
          }
  
          if ((currentIndex === 0)) {
              return $(this).parsley();
          }
      },
      onStepChanged: function (event, currentIndex, priorIndex) {
          if (currentIndex === 2 &amp;&amp; Number($("#age-2").val()) &gt;= 18) {
              $("#form-3").steps("next");
          }
  
          if (currentIndex === 2 &amp;&amp; priorIndex === 3) {
              $("#form-3").steps("previous");
          }
      },
      onFinishing: function (event, currentIndex, newIndex) {
          return $(this).parsley().validate();
      },
      onFinished: function () {
          alert("submitted!");
      }
  });
  </code></pre>
  
  <p>and it's not validating form.. just going to the next steps.</p>
  
  <p>my form is: </p>
  
  <pre><code>&lt;form class="form-horizontal form-bordered" action="" data-parsley-validate id="wizard-validate"&gt;           
      &lt;!-- Wizard Container 1 --&gt;
      &lt;span class="response"&gt;&lt;/span&gt;
      &lt;div class="wizard-title"&gt;Details&lt;/div&gt;
      &lt;div class="wizard-container"&gt;
          &lt;input type="text" name="title" required value="" class="form-control"&gt; 
          &lt;input type="text" name="location" required class="form-control" value="" &gt;
          &lt;input type="text" class="form-control" required id="datepicker1" name="startdate"  value="" /&gt;
          &lt;input type="text" class="form-control" required id="time-picker" name="starttime"  value="" /&gt;
          &lt;input type="text" class="form-control" required id="datepicker2" name="enddate"  value=""  /&gt;
          &lt;input type="text" class="form-control" required id="time-picker2" name="endtime"  value="" /&gt;
      &lt;/div&gt;
      &lt;!--/ Wizard Container 1 --&gt;
  
      &lt;!-- Wizard Container 2 --&gt;
      &lt;div class="wizard-title"&gt;Details 2&lt;/div&gt;
      &lt;div class="wizard-container"&gt;&lt;/div&gt;
      &lt;!--/ Wizard Container 2 --&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>and nothing happens.. just going to next step and that's all.. 
  already tried full attributes like: <code>data-parsley-required</code> or  <code>data-parsley-required="true"</code></p>
  
  <p>my includes of js files in order is:
  1. jquery.js
  2. parsley.js
  3. jquery.steps.js
  4. wizard.js</p>