(unidata-list): Initialize to nil.
(unidata-setup-list): New function.
(unidata-gen-files): New optional arg unidata-text-file. If it's
nil, set unidata-text-file the left command line arg. Call
unidate-setup-list at first.
string-to-int to string-to-number.
(unidata-text-file): Defined to .../unidata.txt.
(unidata-list): Just insert unidata-text-file.
(unidata-get-decomposition): Handle Hangul decomposition.
(unidata-gen-files): Don't use \040, instead at ^L near the end of
file.