Add some MJ and KOSEKI code points corresponding to Daikanwa.

Add some MJ and KOSEKI code points corresponding to Daikanwa.
(U+5142): Unify HD-KS015530.
(A-cgnU+5147): New abstract node.
(U+5147): Add `<-denotational' for A-cgnU+5147.
(HD-KS015720): New character; use `<-denotational' for A-cgnU+5147.
(U+5149): Apply new conventions for glyph granularity; use
`<-denotational@usage' instead of `<-denotational' for BUCS+5149.
(A-U+5149-itaiji-001): New abstract node.
(U+5149-itaiji-001): New character; use `<-denotational' for
A-U+5149-itaiji-001.
(GT-K01201): Likewise.
(JU+5153): Unify HD-KS016040.
(IU+2048C): Unify HD-KS016070.
(U-000204CA): Unify HD-KS016460.