added symbol description data and helper scripts.

boxdrowing.csv is converted from xlsx file, developed by Ms.Sugiyama and Mr.Fujinuma.
checkBoxDrowings.py is the converter from boxdrowing.csv to characters.dic format.
medicalChars.dic is added for future work, regarding symbols.dic for eastern medical characters.
sortCharctersDic.py is helper for characters.dic to sort lines by Unicode character positions.
characters.dic is sorted by Unicode characters. also worked around ti39396.

characters.dic and symbols.dic now contains some box drowing characters which are not supported as in 2013.1jp.