Include <cos.h>.

Include <cos.h>.
(CONCORD_Object): Use `COS_Object' instead of `void*' as the type.
(COS_DS_ent): Renamed from `CONCORD_DS_Table'.
(COS_DS): New type.
(CONCORD_DS): Use `COS_DS' instead of `CONCORD_DS_Table*' as the type.
(concord_open_env): New prototype.
(COS_Genre_ent): Renamed from `CONCORD_Genre_Table'.
(COS_Genre): New type.
(CONCORD_Genre): Use `COS_Genre' instead of `CONCORD_Genre_Table*' as
the type.
(concord_get_genre): New prototype.
(COS_Feature_ent): Renamed from `CONCORD_Feature_Table'.
(COS_Feature): New type.
(CONCORD_Feature): Use `COS_Feature' instead of
`CONCORD_Feature_Table*' as the type.
(concord_get_feature): New prototype.
(COS_Feature_INDEX_ent): Renamed from `CONCORD_INDEX_Table'.
(COS_Feature_INDEX): New type.
(CONCORD_INDEX): Use `COS_Feature_INDEX' instead of
`CONCORD_INDEX_Table*' as the type.
(concord_get_feature_index): New prototype.
(concord_index_get_name): New prototype.
(concord_index_get_genre): New prototype.
(concord_decode_object): New prototype.