- Add Daijiten numbers.

- Add Daijiten numbers.
- Use `<-denotational@usage' instead of `<-denotational' for BUCS
  (super abstract) character objects.
- Add glyph-images of HNG-FHS.
(U+20018-itaiji-001): New character; use `<-denotational@component'
for A-IWDSU+20018.
(U-00020018): Add `<-denotational@component' for A-IWDSU+20018.
(A-M-00052): Unify A-cgnU+2B826.
(IU+2B826): Delete `=>ucs@iwds-1'.
(HNG-KHM0396-0): Add `<-HNG@chise' for U-0002B826, U-0002B742 and
U-00020A44.
(HNG-KHM0344-0): Ditto.
(U-0002B742): New character; use `<-denotational' for A-cgnU+2B826.
(U-0002002C): Apply new conventions for glyph granularity.
(A-IWDSU+20018): New abstract node.