A little blinken lichten tweakin:

	* mote/sgtools/moteleds.C: If an update hasn't been sent for 1.5
	seconds, send one so the other side still knows we're alive.

	* www/BlinkenLichten.class, www/BlinkenLichten.java: Add the blue
	throbbing rectangle of liveness and cross out the lights if the
	connection seems to be down.  Need this stuff, otherwise it's hard
	to tell the difference between the lights not changing and network
	latency.

	* www/showstuff.php3: Widen the size of the blinky light applet.