(U+25220-itaiji-001): Use A-U+25220-itaiji-001 instead of A-GT-K06369

(U+25220-itaiji-001): Use A-U+25220-itaiji-001 instead of A-GT-K06369
as its mother.
(A-GT-K06369): Separate A-U+25220-itaiji-001; add `<-denotational' for
A-IWDSU+25220-itaiji-001.
(A-U+25220-itaiji-001): Separate A-GT-K06369; add `<-denotational' for
A-IWDSU+25220-itaiji-001.
(A-IWDSU+25220-itaiji-001): New abstract node.
(A-U+25220-itaiji-004): New abstract node; use `<-denotational' for
A-IWDSU+25220-itaiji-001.
(U+25220-itaiji-004): Use A-U+25220-itaiji-004 instead of A-GT-K06369
as its mother.