title: FullCalender check if selection days has an event?
body: <p>I am using the Full Calender js plugin, so far so good. but i want to check if a selection between the start and end has events?</p>
  
  <p>I just need a true or false returned. Basically i want to stop users from creating events if an even already exists on the date selection.</p>
  
  <pre><code>var calendar = $('#calendar').fullCalendar({
  
      selectable: true,
      selectHelper: true,
      firstDay: 5,
      weekNumbers: false,
      select: function (start, end, allDay, event) {
          var TitleSet = false;
          StartDate = start;
          EndDate = end;
          if (event) {}
          if (TitleSet) {
              calendar.fullCalendar('renderEvent', {
                  title: title,
                  start: start,
                  end: end,
                  allDay: allDay
              },
              true // make the event "stick"
              );
          }
          calendar.fullCalendar('unselect');
  
      },
      editable: true,
      events: EventsArr,
      eventRender: function (event, element) {
          element.qtip({
              content: event.description
          });
      }
  });
  </code></pre>