Add glyph-images of HNG-KHI.

Add glyph-images of HNG-KHI.
(U+42C4): Apply new conventions for glyph granularity; separate
UU+42C4.
(UU+42C4): Add `=>ucs@iwds-1'; add `<-same' for M-27577.
(CB07560): New character; add `<-denotational' for U+42C4; add
HNG-KHI0140-0.
(BUCS+7D93): New abstract node.
(U+7D4C): Add `<-denotational' for BUCS+7D93.
(U+7ECF): Likewise.
(HNG-KHI0639-1): New character; add `<-denotational' for BUCS+7D93.
(U+7D93): Add `<-denotational' for BUCS+7D93.
(U-00026030): New character; add HNG-KHI0639-2.
(BUCS+7DB2): New abstract node.
(U+7DB2): Add `<-denotational' for BUCS+7DB2.
(BUCS+7DE3): New abstract node.
(U+7DE3): Add `<-denotational' for BUCS+7DE3.
(U+7F18): Likewise.
(HNG-KHI0521-0): New character; add `<-denotational' for BUCS+7DE3.
(U+7E01): Add `<-denotational' for BUCS+7DE3.
(U+7E52): Separate A-UU+7E52 to integrate HD-JT-B855.
(HD-JT-B855): New character; unify MJ020399; add HNG-KHI0142-0.
(U+7E5E): Separate UU+7E5E.
(UU+7E5E): Add `=>ucs@iwds-1'.
(HNG-KHI0137-0): New character; add `<-denotational' for U+7E5E.
(U-000261AF): Separate IU+261AF.
(HNG-KHI0138-0): New character; add `<-denotational' for U-000261AF;
add `<-formed' for U+7E7D.
(IU+261AF): Add `=>ucs@iwds-1'.