started to implement the classifier, src / dest ip, udp port and packet length working
	modified:   ../Exercise3/client1.mrt
	modified:   ../Exercise3/client2.mrt
	modified:   ../Exercise3/omnetpp.ini
	modified:   ../Exercise3/package.ned
	modified:   ../Exercise3/server.mrt
	modified:   src/base/classifier/Classifier.cc
	modified:   src/base/classifier/Classifier.ned