Add glyph-images of HNG-KHI.

Add glyph-images of HNG-KHI.
(U+7B49): Apply new conventions for glyph granularity.
(BUCS+7BCC): New abstract node.
(U+7BCC): Add `<-denotational' for BUCS+7BCC; apply new conventions
for glyph granularity.
(HNG-KHI0130-0): New character; add `<-denotational' for BUCS+7BCC.
(U+7BE9): Separate UU+7BE9 to integrate HNG-KHI0133-0.
(U+7C01): Unify S-5848; add `<-formed' for UU+7BE9.
(BUCS+7C2B): New abstract node.
(U+7C2B): Add `<-denotational' for BUCS+7C2B.
(HNG-KHI0134-0): New character; add `<-denotational' for BUCS+7C2B.
(U+7BAB): Add `<-denotational' for BUCS+7C2B.
(U+7C6D): Unify S-5847; add `<-original' for UU+7BE9.