title: FullCalendar custom header title
body: <p>I need to show a custom header title in the calendar. I am handling  16 calendars and I need every one of them to show their own title. I have tried everything I could modifying this part of the code: </p>
  
  <pre><code>firstDay: &lt;?php echo $iFirstDay; ?&gt;,
  header: {
      left: 'prev,next today',
      center: 'title',
      right: 'month,agendaWeek,agendaDay'
  },
  </code></pre>
  
  <p>But everytime I edit the <code>center</code> to add something else apart from the <code>title</code> my calendar doesn't show any title at all. What should I do?</p>