(M-02334): Use `script' and `<-vulgar-ideograph' instead of `comment'.

(M-02334): Use `script' and `<-vulgar-ideograph' instead of `comment'.
(M-02354): Likewise; add `->synonyms'.
(M-02402): Use `<-ancient-ideograph' instead of
`ancient-char-of-shinjigen-1'.
(M-2415'): Use `<-vulgar-ideograph' instead of `vulgar-ideograph-of';
add `<-simplified-ideograph'.
- Merge KS X 1001, Big5 and GB 12345 code points.
- Use `=>ucs' instead of `->ucs'.
- Use `<-vulgar-ideograph' instead of `vulgar-ideograph-of'.
- Use `->same-ideograph' instead of `ideograph='.