title: add data-title attribute to my <td> in datatables
body: <p>I am using datatables to give all my tables the jquery datatables magic,
  I do my responsive tables by adding data-title to my td's. how can I add the data-title to all my td's so they look like this</p>
  
  <pre><code>&lt;td data-title="Fruit"&gt;Apple&lt;/td&gt;
  &lt;td data-title="Good or bad"&gt;They are delicious&lt;/td&gt;
  </code></pre>
  
  <p>and so on...</p>
  
  <p>I currently have this</p>
  
  <pre><code>$(document).ready(function() {
      $('#contacts').DataTable( {
          "processing": true,
          "serverSide": true,
          "ajax": "src/data.php?form_action=get-table",
  
      } );
  });
  </code></pre>
  
  <p>and my return json looks like this</p>
  
  <pre><code>{
  "draw":"1",
  "recordsTotal":2,
  "recordsFiltered":2,
  "data":[
    [
       "Apples",
       "They are delicious",
       "2016-10-10 07:47:12",
       "New entry",
       "1"
    ],
    [
       "Bananas",
       "They are also delicious",
       "2016-10-10 07:47:12",
       "New entry",
       "2"
    ]
   ]
  }
  </code></pre>