(<FULLWIDTH SOLIDUS>): Unify C1-225F.

(<FULLWIDTH SOLIDUS>): Unify C1-225F.
(C1-2226): Map to U+02CD instead of U+FF3F; moved to
u002B0-Spacing-Modifier-Letters.el.
(<FULLWIDTH MACRON>): Unify C1-2224 and B-A1C3.
- For each `->decomposition' feature which has `wide' property, omit
  it if the character follows `wide' is stored in `<-fullwidth'
  feature.
- Use `=jis-x0208@{1983|1990}' instead of `=jis-x0208-{1983|1990}'.