Add mappings between CJK Ext B and CNS 11643 plain 5.

Add mappings between CJK Ext B and CNS 11643 plain 5.
(U+9F99): Unify JC3-82AD.
(BC-89AF): New character.
(U+9F8E): Add `ideographic-radical@ucs*sources'.
(M-48819): Add `ideographic-{radical|strokes}'.
(UU+9F8E): Likewise.
(C3-5755): Likewise.
(U+9F91): Use `->subsumptive'.
(U-0002A697): New character.
(M-48828): Map to U-0002A697.
(C5-6F64): Copied from Ideograph-R078-Death.el; map to U-0002A697.
(U-0002A698): New character.
(M-48829): Map to U-0002A698; separate C5-6F64.
(U+9F92): Use `->subsumptive'.
(U-0002A6A0): New character.
(M-48840): Map to U-0002A6A0; separate C5-7751.
(U-0002A6A2): New character.
(M-48842): Map to U-0002A6A2.
(U+9F96): Use `->subsumptive'.
(U+9F97): Likewise.
(U+9F98): Use `->subsumptive'.
(U-0002A6A5): New character.
(M-48846): Map to U-0002A6A5; separate C5-7C51.