--- self[name, *rtype]
    쥸ȥ name ɤߡ֤ͤޤ饹
    read [Win32::Registry/read] ˽सޤ
    
    쥸ȥͤη REG_EXPAND_SZ ä硤Ķѿִޤ
    쥸ȥͤη REG_SZ, REG_EXPAND_SZ, REG_MULTI_SZ, REG_DWORD,
    REG_DWORD_BIG_ENDIAN, REG_QWORD ʳä TypeError ȯޤ
    
    ץ rtype ΰ̣ read ƱǤ

--- self[name, wtype = nil] = value
    쥸ȥ name  value 񤭹ߤޤ
    
    ץ wtype ꤷϡηǽ񤭹ߤޤ
    ꤷʤä硤value Υ饹˱Ƽηǽ񤭹ߤޤ:
    :Integer
      REG_DWORD
    :String
      REG_SZ
    :Array
      REG_MULTI_SZ

