title: Fullcalendar: checkboxes on the days of the month
body: <p>I'm using FullCalendar 2.0 to display availability of a user. The user can select when they're available and the information will then be stored into the database.</p>
  
  <p>I've edited fullcalendar.js to display a checkbox on every day of the month, and once the save button is clicked all checked days will be stored.</p>
  
  <pre><code>        return '' +
          '&lt;td class="' + classes.join(' ') + '" data-date="' + date.format() + '"&gt;' + '&lt;input type="checkbox" name="cal[]" id="checkbox-2-' + date.format() + '" class="regular-checkbox big-checkbox" value="' + date.format() +'" /&gt;&lt;label for="checkbox-2-' + date.format() + '"&gt;' + date.date() + '&lt;/label&gt;'
              +
          '&lt;/td&gt;';
  },
  </code></pre>
  
  <p>However when the next or prev button is pressed everything is unchecked. IS there a way to keep the checkboxes checked when the user navigates months?</p>