Add mappings for Big5 code points.

Add mappings for Big5 code points.
(U+8DB7): Unify JC3-66C7.
(U+8DBB): Use `->subsumptive' to separate representative nodes.
(U+8DC6): Unify JC3-9EB7.
(U+47E6): Unify S2-7989; add `<-vulgar' for J0-6C6D.
(U+8DD1): Unify JC3-66CA.
(U+8DD7): Unify JC3-66CB.
(U+8DD9): Unify JC3-66CC.
(U+8DEC): Unify JC3-66CE.
(U+8E14): Unify JC3-66D3.
(U+4803): Use `->subsumptive' to separate representative nodes.
(U+8E16): Unify JC3-66D4.
(U+8E26): Unify JC3-66D7.
(U+8E27): Unify JC3-66D8.
(U+8E2A): Use `->subsumptive'.
(U+480F): Use `->subsumptive' to separate representative nodes.
(U+8E36): Add `<-formed' and `<-same' for JSP-6030.
(U-000280A6): Use `->subsumptive' to separate representative nodes.
(U+8E39): Unify JC3-66DA.
(JSP-602C): Unify JC3-66DB.
(JSP-6030): Unify S-8040 and CB04581; add `<-ancient' for J0-447D; add
`<-original' for S-8039; add `->formed' for J0-447D and U+8E36.
(UU+8E4F): Unify H10-AFE1.
(U+8E53): Unify JC3-93DA.
(U+8E5A): Unify JC3-80A7.
(U+8E5F): Add `<-formed' for J0-4057.
(JSP-6038): Unify JC3-92F2.
(U+8E7A): Unify JC3-66DF.
(U+8E7B): Unify JC3-92F3.
(U+8E83): Use `->subsumptive'.
(U+482C): Use `->subsumptive' to separate representative nodes.
(U-000281E0): New character.
(JSP-6049): Unify JC3-66E1.
(S-8090): New character.
(U+8EA6): Unify JC3-80C4.
(U+8EA7): Use `->subsumptive' to separate representative nodes.