- Use char-spec instead of char-ref as operators in

- Use char-spec instead of char-ref as operators in
  `ideographic-structure' properties.
- Merge `hanyu-dazidian-vol', `hanyu-dazidian-page' and
  `hanyu-dazidian-char'.
(M-00291): Use M-19721 instead of U+7236 in `ideographic-structure'.
(M-00292): Add `ideographic-structure'.
(CB-04846): Add `ideographic-structure'; unify BC-8C5E.
(U+4EA9): Add `ideographic-structure'.
(M-00300): Add `ideographic-structure'; unify BC-8BE5.
(C4-2534): Add `ideographic-structure'.
(U+4EAF): Unify BC-8AA5.
(K0-5322): Add `ideographic-structure'.