Conversion to special characters (example from "&aelig;" to "æ")
<p>I want to save files which will have name with danish characters, for example "Helloæ".</p>

<p>The string which saves the filename has this value: <code>Hello&amp;aelig;</code></p>

<p>How to make it convert <code>&amp;aelig;</code> to <code>æ</code> ? This question isn't just about the "æ" characters, but for all other possible letters.</p>
