title: jQuery-Steps OnFinishing event missing CurrentIndex argument
body: <p>I am using <a href="http://www.jquery-steps.com/GettingStarted" rel="nofollow">jQuery steps</a> and everything seems to be working except I want to have a Finish/Save button for all the steps and perform different actions. Although according to its <a href="https://github.com/rstaib/jquery-steps/wiki/Settings" rel="nofollow">documentation</a> the OnFinishing event has currentIndex as its argument, it doesn't look like it's being set probably and when I debug the code it's always undefined. Is there anything I'm missing in the settings?</p>
  
  <pre><code> $("#wizard").steps({
          /* Appearance */
          bodyTag: "section",
          stepsOrientation: 1,//vertical            
          showFinishButtonAlways: true,
  
          /* Behaviour */
          enableAllSteps: true,
          saveState: true,
  
          /* Events */
          onStepChanging: function (event, currentIndex, newIndex) {                                              
             return true;
          },
          onStepChanged: function (event, currentIndex, priorIndex) { },
          onFinishing: function (event, currentIndex) {                
              console.log(currentIndex);                
          },
          onFinished: function (event, currentIndex) {
              console.log(currentIndex); 
          },
  
          /* Labels */
          labels: {
              current: "current step:",
              pagination: "Pagination",
              finish: "Save",
              next: "Next",
              previous: "Previous",
              loading: "Loading ..."
          }
      });
  </code></pre>