Add glyph-images of HNG-KAR.

Add glyph-images of HNG-KAR.
(HNG-KAR0643-0): New character; use `<-denotational' for U+5449.
(HNG-KHM0237-0): Use `<-subsumptive' for UU+54C0 instead of
`<-denotational' for U+54C0.
(U+54ED): Separate UU+54ED.
(HNG-KAR0683-0): Use `<-denotational' for U+54ED.
(A-M-03829): New abstract node.
(U+555A): Add `<-denotational' for A-M-03829.
(U-00020DF0): New character; use `<-denotational' for A-M-03829; use
`<-formed' for U+555A.
(MJ008401): New character; use `<-denotational' for U-00020DF0; unify
HD-KS044550.
(IU+20DF0): New character; use `<-denotational' for U-00020DF0.
(HNG-KAR0667-0): New character; use `<-denotational' for U+55BB; use
`<-formed' for U+55A9.