Implement casting between UValue and k2 binary representation.
Implement casting between UValue and k2 binary representation.

	* src/uvalue-cast.cc(object_cast)(uvalue_cast): Handle DATA_BINARY
	  and kind_object cases.

urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi