Stephan Bösch-Plepelits authored Mar 14, 2012 and Ievgen Kartakov committed Sep 22, 2012

- UTF-8 characters may not be converted to html entities (e.g. ä -> ä)
- the characters that need to be converted for xml are apparently already
  converted (<, >, &, ")

Revrited some functionality. Now using PHPExcel class to support utf8. #549046 by Alpha5: Unicode support. #602036 by rekcor: Dependency fixed. #604464 by pimousse98: Broken image path fixed.