excersise_2

Purpose: to show/learn how a program can communicate with the blackboard
	and through the blackboard to another program.
	In this case at least one of the programs needs to be a
	knowledge handler; as you will see in lib/uc/initial/kbs this is
	only a minimal version.

Usage: source .iferc_x2
	run ex2_bb
	and watch what happens on the bb by typing "update_me<tab>uswer_dialog".
