(BUCS+5305): New abstract node.

(BUCS+5305): New abstract node.
(U+5305): Add `<-denotational' for BUCS+5305.
(A-UU+5305): New abstract node; use `<-denotational' for U+5305.
(UU+5305): Use A-UU+5305 instead of U+5305 as the mother.
(U+5305-itaiji-002): New character; use `<-denotational' for
A-UU+5305; use `->mistakable' for MJ058438.
(HNG-KAR0047-0): Use U+5305-itaiji-002 instead of UU+5305 as the
mother.
(HNG-KAR0046-0): Use U+5305-itaiji-002 instead of UU+5305 in
`ideographic-structure'.