Converter from Wiktionary to lemon.
The converter can be executed as follows
DUMP_DATE=20120101
wget http://download.wikimedia.org/enwiktionary/20110724/enwiktionary-$DUMP_DATE-pages-articles.xml.bz2
bunzip2 enwiktionary-$DUMP_DATE-pages-articles.xml.bz2
mkdir -p dumps/
mv enwiktionary-$DUMP_DATE-pages-articles.xml dumps/
LINES=`wc -l enwiktionary-$DUMP_DATE-pages-articles.xml`
mvn exec:java -Dexec.mainClass=eu.monnetproject.webaccess.dictionary.wiktionary.WiktionaryGenerator \
-Dexec.args="$DUMP_DATE $LINES"