(A-BC-8D56-itaiji-002): New abstract node.

(BC-8D56-itaiji-002): New character; use `<-denotational' for
A-BC-8D56-itaiji-002.
(U-00020A60): Add `<-denotational@component' for A-IWDSU-20A60; apply
new conventions for glyph granularity.
(A-U+20A60-itaiji-001): New abstract node; use
`<-denotational@component' for A-IWDSU-20A60.
(U+20A60-itaiji-001): New character; use `<-denotational' for
A-U+20A60-itaiji-001.
(A-IWDSU-20A60): New abstract node.