improves set_scheme method
fixes populate_more_bopomofo_index
update pinyin_parser_table.h
update set_scheme method
drop ChewingSimpleParser2
update chewing_table.h
update chewing_table.h.in
update test_parser2.cpp
write search_chewing_symbols2 function
begin to write ChewingDaChenCP26Parser2 class
fixes warnings
write parse_one_key method
write parse method
improves parse method
write in_chewing_scheme method
begin to write ChewingDirectParser2
write parse_one_key method
write parse method
update test_parser2
drop professional dictionaries