libmecab.dll is from mecab-0.98.exe
available at http://sourceforge.net/projects/mecab/

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MeCab is copyrighted free software by Taku Kudo <taku@chasen.org> and
Nippon Telegraph and Telephone Corporation, and is released under
any of the GPL (see the file GPL), the LGPL (see the file LGPL), or the
BSD License (see the file BSD).