(BC-88D3-itaiji-001): New character; use `<-denotational' for
A-BC-88D3.
(BC-88D3): Likewise.
(BC-89E1): New character.
(U-0002D1A5): New character.
(IWDS1-0125): Unify A-IWDSU+378B instead of A-compU+378B.
(U-00020B1D): Add representative nodes.
(U+53CD): Add `ideographic-structure'.
(U-00020B60): Apply new conventions for glyph granularity.