title: When exporting to csv special characters (čćšžđ) don't work
body: <p>Little help need it in export data from database to csv.
  My country, unfortunately has special characters čćšžđ.
  The export works fine, and if open the .csv in Notepad++ it gives me the correct form of the word. but when it is opened in Excel the special characters are hieroglyphic like.
  Example in database i have:
  IZLETIŠTE STOJČIĆ in the array before export: IZLETIŠTE STOJČIĆ, in Notepad++ : IZLETIŠTE STOJČIĆ, but in Excel i get IZLETIĹ TE STOJÄŚIÄ†</p>
  
  <p>Why wont it work?
  Here is the code, do I have to add something to it or do I need to change something in Excel</p>
  
  <pre><code>function convertToCSV($data, $options) {
  
      $exportName = implode($options['exportName']);
  
      // setting the csv header
      if (is_array($options) &amp;&amp; isset($options['headers']) &amp;&amp; is_array($options['headers'])) {
          $headers = $options['headers'];
      } else {
          $headers = array(
              'Content-Type' =&gt; 'text/csv,charset=UTF-8',
              'Content-Disposition' =&gt; 'attachment; filename="'.$exportName.'.xls"'
          );
      }
  
      $output = '';
  
      // setting the first row of the csv if provided in options array
      if (isset($options['firstRow']) &amp;&amp; is_array($options['firstRow'])) {
          $output .= implode('    ', $options['firstRow']);
          $output .= "\n"; // new line after the first line
      }
  
      // setting the columns for the csv. if columns provided, then fetching the or else object keys
      if (isset($options['columns']) &amp;&amp; is_array($options['columns'])) {
          $columns = $options['columns'];
      } else {
          $objectKeys = get_object_vars($data[0]);
          $columns = array_keys($objectKeys);
      }
  
      // populating the main output string
      foreach ($data as $row) {
          foreach ($columns as $column) {
              $output .= str_replace('    ', ';', $row-&gt;$column);
              $output .= '    ';
          }
          $output .= "\n";
      }
  
      // calling the Response class make function inside my class to send the response.
      // if our class is not a controller, this is required.
      return Response::make($output, 200, $headers);
  }
  </code></pre>