* dbus/dbus-signature.c (dbus_signature_iter_get_signature):
	New function, returns signature string for signature iter.
	* dbus/dbus-signature.h: Prototype it.
	* dbus/dbus-message.c (dbus_message_iter_get_signature):
	New function, returns signature string for message iter.
	(dbus_message_iter_get_array_len): New function, returns
	length of array.
	(dbus_message_iter_get_fixed_array): Fix assertion; this
	function should be used when the iter is pointing to the
	contents of an array
	* dbus/dbus-message.h: Prototypes.
	* dbus/dbus-marshal-recursive.c (_dbus_type_reader_get_array_length):
	New function; returns length of an array.
	* dbus/dbus-marshal-recursive.h: Prototype it.