#919 Accents don't export to RTF

[Anonymous]

Some accents fail to export correctly to RTF format. If I right-click on the following entry and export it to Harvard RTF, then umlaut "a" and circumflex "i" come out as something Cyrillic and "o" respectively.

@ARTICLE{vowel.2004,
author = {Vowel, First},
title = {{M}{\"a}ny {\~a}ccents fa{\^i}l in v{\=o}w{\'e}ls},
journal = {Journal of Child Language},
volume = {21},
year = {2004},
pages = {1-100},
}

Output: Vowel, First (2004). Mдny ãccents faоl in vōwéls. Journal of Child Language 21: 1-100.

[Ruy Minoru Ito Takata]

Generated pull request https://github.com/JabRef/jabref/pull/38 to fix the bug.