Initial Hanzi math implementation

[mreichhoff]

Messy, buggy...it's a start though.

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[mreichhoff]

!math 亻+寸+厂+人+⺆ (result: 腐)

!math 腐-仌 (result: 府)

!math 酒-氵+各 (result: 酪)

!math 氨-女 (result: 气)

!math 力+口+壴 (result: 嘉)

!math 嘉-壴 (result: 加)

known bad results:

• operations like: !math 加+加-加+加-加 (the empty list handling comment is relevant...that must be improved)
• self-addition and subtraction: the components data doesn't duplicate components (e.g., 从-->人, it doesn't have two 人 children)
• similar thing for addition of component and subcomponent: !math 力+口+壴+豆 also gets 嘉, since 豆 is under 壴. Users may or may not want such transitiveness in that case.