The bundled unidata.map is created from UnicodeData.txt,
DerivedNormalizationProps.txt, SpecialCasing.txt and EastAsianWidth.txt
of Unicode 6.0.

To update unidata.map,

  ruby mkunidata.rb UnicodeData.txt DerivedNormalizationProps.txt SpecialCasing.txt EastAsianWidth.txt  > unidata.map
