Add some representative nodes.

Add some representative nodes.
(U-0002504B): Unify 29417, GT-K05615 and S-5245; add `<-original' for
U+76CD.
(U+76C7): Unify GT-29418, GT-K05605 and S-5246; use `<-same' instead
of `<-unknown' for U-0002504B; add `<-vulgar' for U+76CD.
(U+76CA): Apply new conventions for glyph granularity.
(U+76D7): Likewise.
(U+76DC): Likewise.
(U-00025077): Unify M-23017.
(U-00025078): Integrate M-23018.
(U-00025079): Unify M-23021.
(U-0002507A): Unify M-23022; add `<-same' for U+9193.
(U+4005): Integrate M-23023.
(UU+76DF): Apply new conventions for glyph granularity.
(U-0002507B): Unify M-23025.
(U+76E3): Apply new conventions for glyph granularity.
(U-00025088): Unify M-23035.
(U+76E4): Apply new conventions for glyph granularity.
(U-0002508A): Unify M-23038.
(U+76E6): Apply new conventions for glyph granularity.