Add some representative nodes.

Add some representative nodes.
(U-00020507): Use `ideographic-{radical|strokes}@daikanwa' instead of
`ideographic-{radical|strokes}@cns'; use
`ideographic-{radical|strokes}@ucs/code' instead of
`ideographic-{radical|strokes}@ucs'; apply new conventions for glyph
granularity.
(U+8FF0): Apply new conventions for glyph granularity.
(U-000284B0): Use `->denotational' and `->subsumptive'.
(U+900E): Apply new conventions for glyph granularity.
(U+9019): Likewise.
(M-38905): Unify S-8238.
(U+9039): Apply new conventions for glyph granularity.
(KU+9041): Likewise.
(U+904D): Likewise.
(U+9052): Likewise.
(U+9055): Likewise.
(U+905C): Likewise.
(U+9072): Likewise.
(U+9077): Likewise.
(U+908F): Likewise.