(U+36A3): Add `sound@ja/on'; add `<-ancient' for UU+59E3.

(U+36A3): Add `sound@ja/on'; add `<-ancient' for UU+59E3.
(U+5996): Add `<-denotational@usage' for BUCS+5996; apply new
conventions for glyph granularity.
(U+59E3): Add `<-denotational@usage' for BUCS+59E3; apply new
conventions for glyph granularity.
(U+5A07): Add `<-denotational@usage' for BUCS+5B0C; apply new
conventions for glyph granularity.
(U-00021752): New character.
(U-00021753): Modify structure; preserve the previous IDS as an
apparent structure.
(U+5B0C): Add `<-denotational@usage' for BUCS+5B0C; apply new
conventions for glyph granularity.
(U-000218B0): Add `sound@ja/on'.
(GT-08433): Add `<-vulgar' for JU+5A90.
(U-0002D4A1): New character; use `<-denotational' for A-IWDSU+2D4A1.
(A-IWDSU+2D4A1): New abstract node.
(BUCS+5996): New abstract node; unify A2-DJT-02043.
(BUCS+59E3): New abstract node; unify A2-DJT-02088.
(BUCS+5B0C): New abstract node; unify A2-DJT-02234.