Multi-threaded asynchronous UDP server
functionality added

	modified:   bin/cassandra_driver_test
	modified:   makefile
	modified:   obj/cassandra_db.o
	modified:   obj/cassandra_driver_test.o
	new file:   src/communication/io_service_pool.cpp
	new file:   src/communication/io_service_pool.h
	deleted:    src/server/HomeAgentServer.h
	new file:   src/server/home_agent_server.cpp
	new file:   src/server/home_agent_server.h
	modified:   src/test/cassandra_driver_test.cpp