title: Can't fit file encoding when working with Chrome File System API
body: <p>I need to read a file which contains a group of  symbols moved 65 in ASCII table. It means, for each symbol I am meant to do:</p>
  
  <pre><code>String.fromCharCode('¢'.charCodeAt(0)-65) // returns 'a'
  </code></pre>
  
  <p>But it is not working at all. I have asked friends of mine to do the test using Python   inputting the same file and they got the correct result.</p>
  
  <p>When I try to do the same work with Chrome File System it does not work at all. 
  I can't get back the expected symbols. I think it is a problem with my encoding/charset plataform but I can't figure out what is and how fix it.</p>
  
  <p>I have tried opening the file with other encoding:</p>
  
  <pre><code>var reader=new FileReader();
  
  reader.readAsText(file, 'windows-1252'); // no success
  reader.readAsText(file, 'ISO-8859-2'); // no success
  </code></pre>
  
  <p>Appreciate any help</p>