(A-IWDSU+37A4): New abstract node.

(A-IWDSU+37A4): New abstract node.
(U+37A4): Apply new conventions for glyph granularity; add
`<-denotational' for A-IWDSU+37A4.
(U+37A5): Likewise.
(U-00021D8D): Use `->denotational' and `->subsumptive'.
(U-00021D96): New character.
(U+37CE): Add `<-denotational@usage' for A2-DJT-02595; add
`sound@ja/on/{kan|go}'.
(M-08113): Unify MJ000857 and KOSEKI-091940; add `->formed' for
CU+21F43 and UU+5D9E.
(UU+37CE): Unify DJT-02595.
(U+5D9E): Apply new conventions for glyph granularity.
(U-00021F43): Use `->denotational' and `->subsumptive'.
(U-00021FB4): New character.
(U-00021FB5): New character.
(U-00021FDB): Use `->denotational' and `->subsumptive'.
(U-00021FD9): New character.
(A2-DJT-02595): New abstract node.