(A-GT-K09818): New abstract node.

(A-GT-K09818): New abstract node.
(U+5950-itaiji-003): New character; use `<-denotational' for
A-GT-K09818.
(GT-K09818): Likewise.
(U-0002D42C): New character.
(U+5912): Add `ideographic-structure'.
(U+5912-var-003): New character; use `<-denotational' for U+5912.
(U+5912-var-004): Likewise.
(JU+5912): Apply new conventions for glyph granularity.
(U+5914): Add `ideographic-structure'.
(M-05746): Unify MJ009427, HD-KS065840 and KOSEKI-065840.
(JU+5914): Apply new conventions for glyph granularity.
(UU+5914): Likewise.
(U-00021582): New character; use `<-denotational' for A-JU+8641.
(M-05747): Unify IU+21582, MJ023255, HD-JT-AFB0, KOSEKI-065360 and
JC3-48D3; use U-00021582 instead of A-JU+8641.