title: PHPExcel renaming default worksheet name to another name
body: <p>I am using <strong>PHPExcel</strong> to export my files from database, but my problem is when I download my excel the name of my sheet is the default "Worksheet". I would like to set it to another name like <em>"Hello world"</em>. </p>
  
  <p>Here's my code so far</p>
  
  <pre><code>require_once dirname(__FILE__) . '/Classes/PHPExcel.php';
  $objPHPExcel = new PHPExcel();
  $objPHPExcel-&gt;setActiveSheetIndex(0)
      -&gt;setCellValue('A1', '1')
      -&gt;setCellValue('B1', '2')
      -&gt;setCellValue('C1', '3')
      -&gt;setCellValue('D1', '4')
      -&gt;setCellValue('E1', '5')
      -&gt;setCellValue('F1', '6')
      -&gt;setCellValue('G1', '7')
      -&gt;setCellValue('H1', '8')
      -&gt;setCellValue('I1', '9')
      -&gt;setCellValue('J1', '10');
  $row = 2; 
  while($rowz = $result-&gt;fetch(PDO::FETCH_ASSOC)) {
      $col = 0;
      foreach($rowz as $key=&gt;$value) {
          $objPHPExcel-&gt;getActiveSheet()-&gt;setCellValueByColumnAndRow($col, $row, $value);
          $col++;
      }
      $row++;
  }
  </code></pre>
  
  <p>How am I able to set the new title for my worksheet? Thanks!</p>