inserted classifier queing lib files into inet src
	modified:   Exercise3/simulations/omnetpp.ini
	new file:   inet/src/base/queueing/Classifier.cc
	new file:   inet/src/base/queueing/Classifier.h
	new file:   inet/src/base/queueing/Classifier.ned
	new file:   inet/src/base/queueing/Job.h
	new file:   inet/src/base/queueing/QueueingDefs.h
	new file:   inet/src/base/queueing/Sink.cc
	new file:   inet/src/base/queueing/Sink.h
	new file:   inet/src/base/queueing/Sink.ned