title: jquery datatables: Select Extension: How to select first row on init and how to get at least one row selected
body: <p>I have two questions for jquery datatables :</p>
  
  <ol>
  <li>Is it possible to select the first row automatically when the DataTable is initialized?</li>
  <li>At the moment it is possible, that the user deselect an item by clicking on it. I want, that at least one row keeps selected. When the user clicks to the selected row, the selection should not be removed.</li>
  </ol>
  
  <p>This is my initialization of my DataTable: </p>
  
  <pre><code>ar dataTableOption = {"pageLength": 5,
      "pagingType": "simple",
      "info": false,
      "searching": false,
      "select": {
          style: 'single'
      },
      "lengthChange": false,
      "columnDefs": [
          {
              "targets": [0],
              "visible": false,
              "searchable": false
          }
      ]
  };
  
  dataTable = $('#dataTable').DataTable(dataTableOption);
  </code></pre>
  
  <p>Thank you for your help in advance!</p>