modified:   sys_rt.h
reverted to original file
modified:   ab3418_libudp.c
	get_spat: Removed fpout, the file descriptor for output. It's not needed.
	check_and_reconnect_serial: Removed scanning for serial/USB ports. This was helpful
		when there was only one port, not if we're using more than one.
	spat2battelle: Added printfs for debugging.
		Added one calculation for battelle_spat->time_to_change[3].VehMaxTimeToChange.
		It doesn't work yet.
modified:   ab3418_libudp.h
	get_spat: Removed fpout, the file descriptor for output. It's not needed.
modified:   ab3418commudp.c
	Added opening of second serial port.
	Changed names of fpin & fpout throughout the file to ab3418_fdin/fdout
	and ca_spat_fdin/fdout.
	Moved reception and dealing with spat messages to after the first get of timing
	parameters.  The spat was in an infinite loop which then exited, BEFORE the
	usual infinite loop to test parsing of spat messages. Now, we get the timing data
	and use it to create the Battelle spat message.