add descriptions and change license from Unlicense to CC0.
http://creativecommons.org/publicdomain/zero/1.0/legalcode.txt
this will be not a program but just a data.
first meaning full commit that contains 4 files
from 1 source file:
  braille-ja-table-source.tsv
  =>
  braille-ja-table-{raw,escaped}.{tsv,json}