Sort simplified Chinese by PinYin


    > compare_chinese_string_by_pinyin "Angel" "天使"
    LT
    > compare_chinese_string_by_pinyin "恶魔" "天使"
    LT
    > compare_chinese_string_by_pinyin "恶魔" "大天使"
    GT
    > map show_pinyin "世界"
    [Just "shi4",Just "jie4"]