(BUCS+56DE): New abstract node.

(BUCS+56DE): New abstract node.
(U+56D8): Use `ideographic-{radical|strokes}@cns' instead of
`ideographic-{radical|strokes}'; add
`ideographic-{radical|strokes}@ucs'; add `<-denotational' for
BUCS+56DE; copied from Ideograph-R013-Down-Box.el.
(A-IWDSU+56DE): New abstract node; use `<-denotational' for BUCS+56DE.
(U+56DE): Add `<-denotational' for A-IWDSU+56DE.
(U+56EC): Likewise; apply new conventions for glyph granularity.
(M-04801): Unify U-000211F8.
(M-04802): Unify U-000211FA, MJ032881 and KOSEKI-054790.
(A-U+753E-itaiji-001): New abstract node.
(U+753E-itaiji-002): New character; use `<-denotational' for
A-U+753E-itaiji-001.
(U+753E-itaiji-001): Likewise.