(concord_ds_open_genre): Use <char*> instead of <unsigned char*> for

(concord_ds_open_genre): Use <char*> instead of <unsigned char*> for
genre-name.
(concord_genre_open_feature): Likewise.
(concord_genre_open_index): Use <char*> instead of <unsigned char*>
for index-name.
(concord_genre_get_feature_0): Use <char*> instead of <unsigned char*>
for feature-name.
(struct CONCORD_DS_Table): Use <char*> instead of <unsigned char*> for
member `location'.
(concord_default_read_object): Cast to avoid warning.
(concord_open_ds): Use <char*> instead of <unsigned char*> for
ds->location.
(concord_ds_foreach_genre_name): Use <char*> instead of <unsigned
char*> for ds->location; cast to avoid warning.
(struct CONCORD_Genre_Table): Use <char*> instead of <unsigned char*>
for member `name'.
(concord_ds_open_genre): Use <char*> instead of <unsigned char*> for
genre-name.
(concord_genre_foreach_feature_name): Use <char*> instead of <unsigned
char*> for ds->location.
(concord_genre_get_feature_0): Use <char*> instead of <unsigned char*>
for genre-name.
(concord_genre_get_feature): Use <char*> instead of <unsigned char*>
for t_name.
(struct CONCORD_Feature_Table): Use <char*> instead of <unsigned
char*> for member `name'.
(concord_genre_open_feature): Use <char*> instead of <unsigned char*>
for feature-name.
(concord_obj_gets_feature_value): Cast to avoid warning.
(struct CONCORD_INDEX_Table): Use <char*> instead of <unsigned char*>
for member `name'.
(concord_genre_open_index): Use <char*> instead of <unsigned char*>
for index-name.
(concord_index_strid_put_obj): Cast to avoid warning.