(U+548A): Apply new conventions for glyph granularity; add

(U+548A): Apply new conventions for glyph granularity; add
`<-denotational@usage' for BUCS+548C.
(U+548C): Likewise.
(U+357F): Apply new conventions for glyph granularity.
(U-00020D99): New character.
(U-00020E14): New character.
(U+557E): Apply new conventions for glyph granularity; add
`<-denotational@usage' for BUCS+557E.
(U-00020E16): New character.
(U-00020EB9): New character.
(U-00020FA7): Add `sound@ja/on'.
(IU+20FA7): Add `<-same' for UU+563C.
(U-000210FB): New character.
(U-00021196): New character.
(BUCS+548C): New abstract node; unify A2-DJT-01263.
(BUCS+557E): New abstract node; unify A2-DJT-01390.