title: event.target is undefined in events
body: <p>How can one use <code>each</code> input values in <code>events</code>? Hope my below code will explain you well.</p>
  
  <p>HTML:</p>
  
  <pre><code>&lt;template name="UpdateAge"&gt;
      {{#each Name}}
      &lt;div data-action="showPrompt"&gt;
         &lt;div&gt;
            Some content
         &lt;/div&gt;
  
         &lt;div&gt;
           &lt;div&gt;
              Some content
           &lt;/div&gt;
         &lt;/div&gt;
         &lt;div&gt;
             Name : {{name}}
             Age : &lt;input type="text" name="age" value="{{age}}"/&gt; //I need to access age values in event
         &lt;/div&gt;
      &lt;/div&gt;
  {{/each}}
  &lt;template&gt;
  </code></pre>
  
  <p>JS:</p>
  
  <pre><code>Template.UpdateAge.events({
    'click [data-action="showPrompt"]': function (event, template) {
          console.log(event.target.age.value); // TypeError: event.target.age.value is undefined
    }
  });
  </code></pre>
  
  <p>I dont know whether my approach is good for passing parameter values to <code>events</code> so suggestions are welcome.</p>