title: fullcalendar set an id it's not working
body: <p>Hello I have the following haml javascript code to render a fullcalendar:</p>
  
  <pre><code>%script(type="text/javascript")
    $(document).ready(function (){
    $('#calendar').fullCalendar({
    defaultView: 'agendaWeek',
    editable: false,
    eventLimit: true,
    events: [
    - @kid.availabilities.order("availability_date desc").each do |availability|
      {
      id:    "#{availability.id}",
      title: "Available",
      start: "#{availability.availability_date.to_datetime.strftime("%Y-%m-%dT%H:%M:%S")}",
      end:   "#{availability.end_availability_date.to_datetime.strftime("%Y-%m-%dT%H:%M:%S")}",
      url: "#",
      description: 'This is a cool event'
      },
    ],
    timeFormat: 'H(:mm)',
    });
    });
  </code></pre>
  
  <p>as you can see I created the events using a ruby code and for every event I'm trying to add an Id in order to catch what event does the user makes click, but I can't make the fullcalendar to show my id. Here is a html example of one of the events:</p>
  
  <pre><code>&lt;div class="fc-event-container"&gt;
      &lt;a class="fc-time-grid-event fc-event fc-start fc-end" href="#" style="top: 379px; bottom: -417px; z-index: 1; left: 0%; right: 0%;"&gt;
          &lt;div class="fc-content"&gt;
              &lt;div class="fc-time" data-start="10" data-full="10:00 AM - 11:00 AM"&gt;
                  &lt;span&gt;10 - 11&lt;/span&gt;
              &lt;/div&gt;
              &lt;div class="fc-title"&gt;Available&lt;/div&gt;
          &lt;/div&gt;
          &lt;div class="fc-bg"&gt;&lt;/div&gt;
      &lt;/a&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>this is the code generate by ruby on rails:</p>
  
  <pre><code>      $(document).ready(function (){
        $('#calendar').fullCalendar({
        defaultView: 'agendaWeek',
        editable: false,
        eventLimit: true,
        events: [
        {
        id:    "540dc2d320db90214f0003d6",
        title: "Available",
        start: "2014-09-09T16:00:00",
        end:   "2014-09-09T17:00:00",
        url: "#",
        description: 'This is a cool event'
        },
        {
        id:    "540dc32c20db90214f0003dc",
        title: "Available",
        start: "2014-09-09T17:00:00",
        end:   "2014-09-09T18:00:00",
        url: "#",
        description: 'This is a cool event'
        },
        {
        id:    "540dc33320db90214f0003e0",
        title: "Available",
        start: "2014-09-09T18:00:00",
        end:   "2014-09-09T19:00:00",
        url: "#",
        description: 'This is a cool event'
        },
        {
        id:    "540dc38820db90214f0003e5",
        title: "Available",
        start: "2014-09-09T19:00:00",
        end:   "2014-09-09T20:00:00",
        url: "#",
        description: 'This is a cool event'
        },
        {
        id:    "540dc39520db90214f0003e9",
        title: "Available",
        start: "2014-09-09T20:00:00",
        end:   "2014-09-09T21:00:00",
        url: "#",
        description: 'This is a cool event'
        },
        {
        id:    "540eba1a20db900512000003",
        title: "Available",
        start: "2014-09-10T10:00:00",
        end:   "2014-09-10T11:00:00",
        url: "#",
        description: 'This is a cool event'
        },
        {
        id:    "540eba4620db900512000008",
        title: "Available",
        start: "2014-09-11T10:00:00",
        end:   "2014-09-11T11:00:00",
        url: "#",
        description: 'This is a cool event'
        },
        {
        id:    "540eba7c20db90051200000d",
        title: "Available",
        start: "2014-09-10T12:00:00",
        end:   "2014-09-10T13:00:00",
        url: "#",
        description: 'This is a cool event'
        },
        ],
        timeFormat: 'H(:mm)',
        });
        });
  </code></pre>
  
  <p>as you can see I don't have an Id on the html tag, but I have it on the jquery code; also if you check the <a href="http://fullcalendar.io/docs/event_data/Event_Object/" rel="nofollow">fullcalendar documentation</a> I have an Id property, but I don't know what I'm doing wrong.</p>
  
  <p>Thanks in advance for your help.</p>