Revised gateway demo to use the new device_init(NULL) way.
Eliminated triplicate I-Am responses and deprecated the offending routed_ I-Am and I-Have senders (don't see any other usages; scheduled for deletion in 2/2012).
Fixed I-Am sender to not always zero out dest->net, because if a src->net was given in Who-Is, need to have it or else global bcast in the I-Am response.
For the important Device_Object_Instance_Number(), will redirect to the Routed_Device_Object_Instance_Number() function if this is a routing build.
This leaves only the Who-Is and Who-Has handlers to be dealt with.
Renamed Lookup_Routed_Device_Address() as Routed_Device_Address_Lookup(), and replaced it in the routed npdu handler with a function that finds the "next" gateway or routed device, as per the destination address. (Less tied to the specifics of the gw_device.c implementation.)
Fixed a few build warnings (eg, %zu for size_t arguments).
Until we improve the makefile system, I've enabled BAC_ROUTING in config.h
tbrennan3