Cab type conversions

Generally, Cab node is allowed to be queried for or assigned with a value of type that is different from the node type, within the limitations of the following type conversions rules:

Source type	Destination type
	dt_Bool	dt_Int	dt_Int64	dt_Double	dt_String	dt_Stream	dt_IUnknown	dt_Array	dt_Dictionary
dt_Bool	Direct	true -> 1, false -> 0	true -> 1, false -> 0	N/A	true -> "true", false -> "false"	N/A	N/A	N/A	N/A
dt_Int	(value == 0) -> false, (value == 1) -> true	Direct	Direct	standard integer -> double conversion	standard integer -> string conversion	N/A	N/A	N/A	N/A
dt_Int64	(value == 0) -> false, (value == 1) -> true	Direct	Direct	standard integer -> double conversion	standard integer -> string conversion	N/A	N/A	N/A	N/A
dt_Double	N/A	lossless double->integer conversion (if possible)	lossless double->integer conversion (if possible)	Direct	standard double->string converison	N/A	N/A	N/A	N/A
dt_String	"true" (case insensitive) -> true, "false" (case insensitive) -> false	standard string->integer conversion (if possible)	standard string->integer conversion (if possible)	standard string -> double conversion (if possible)	Direct	N/A	N/A	N/A	N/A
dt_Stream	N/A	N/A	N/A	N/A	N/A	Direct	N/A	N/A	N/A
dt_IUnknown	N/A	N/A	N/A	N/A	N/A	N/A	Direct	N/A	N/A
dt_Array	N/A	N/A	N/A	N/A	N/A	N/A	N/A	Direct	N/A
dt_Dictionary	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	Direct