title: Download BLOB content using specified charset
body: <p>Is possible to change the Blob charset really? I'm trying it for hours but it doesn't workds. <a href="http://jsfiddle.net/H4EHt/"><strong>See this</strong></a>.</p>
  
  <pre><code>jQuery("#download").click(function() {
      var csv_content = jQuery("#csv").val(),
          download = document.createElement("a"),
          blob = new Blob([csv_content], { type: "text/csv;charset=ISO-8859-1" });
  
      download.href = window.URL.createObjectURL(blob);
      download.download = "test.csv";
  
      var event = document.createEvent("MouseEvents");
      event.initMouseEvent(
          "click", true, false, window, 0, 0, 0, 0, 0
          , false, false, false, false, 0, null
      );
      download.dispatchEvent(event);    
  });
  </code></pre>
  
  <p>I need export a CSV to open on Excel, but it always is save with UTF-8 and Excel can't handle it.</p>