(A-cgnU+531D): New abstract node.

(A-cgnU+531D): New abstract node.
(A-IWDSU-531D): New abstract node; use `<-denotational' for
A-cgnU+531D.
(U+531D): Add `<-denotational' for A-IWDSU-531D.
(A-U+531D-itaiji-001): New abstract node; use `<-denotational' for
A-IWDSU-531D.
(U+531D-itaiji-001): New character; use `<-denotational' for
A-U+531D-itaiji-001.
(A-U+531D-itaiji-002): New abstract node; use `<-denotational' for
A-cgnU+531D.
(U+531D-itaiji-002): New character; use `<-denotational' for
A-U+531D-itaiji-002.
(U-0002B9CD): Apply new conventions for glyph granularity.