(test_map_func): Modify for chise_char_feature_value_iterate.

(test_map_func): Modify for chise_char_feature_value_iterate.
(main): Rename `dt_*' to `ccs_*'; use `chise_ds_get_ccs' instead of
`chise_ds_open_decoding_table'; use `chise_ccs_decode' instead of
`chise_dt_get_char'; don't use `chise_dt_close'; use `use
`chise_ds_get_feature' instead of `chise_ds_open_feature_table'; use
`chise_char_gets_feature_value' instead of `chise_ft_get_value'; use
`chise_char_feature_value_iterate' instead of `chise_ft_iterate';
don't use `chise_ft_close'.