title: bootstrap-select does not proxies click event
body: <p>I had select element: </p>
  
  <pre><code>  &lt;select id='selectBox'&gt;
      &lt;option&gt;Mustard&lt;/option&gt;
      &lt;option&gt;Ketchup&lt;/option&gt;
      &lt;option&gt;Relish&lt;/option&gt;
    &lt;/select&gt;
  </code></pre>
  
  <p>and set click event via jquery: </p>
  
  <pre><code>$('#selectBox option').click(function(){
  .....
  });
  </code></pre>
  
  <p>after using <a href="http://silviomoreto.github.io/bootstrap-select/">http://silviomoreto.github.io/bootstrap-select/</a> :</p>
  
  <pre><code>  &lt;select id='selectBox' class="selectpicker" multiple="" data-selected-text-format="count"&gt;
      &lt;option&gt;Mustard&lt;/option&gt;
      &lt;option&gt;Ketchup&lt;/option&gt;
      &lt;option&gt;Relish&lt;/option&gt;
    &lt;/select&gt;
  </code></pre>
  
  <p>I got nice multiply dropdown and all work fine except that when I click on menu item (select or delestct it) nothing happends. </p>
  
  <p>Why not click event proxies from my original (which was hided) option element to the new created element 'ul.dropdown-menu li a' ? How can I fix it?</p>