Implemented Keep-Alives and Release commands in spider.
Tested for two spiders by replacing scanning with random sleep, they always "scan" different servers.
Function addServer has been added to ServerQueue. Tests have been added for ServerQueue.
	modified:   smbtaskd/serverqueue.cpp
	modified:   smbtaskd/serverqueue.h
	modified:   tests/full-test/fulltest.cpp
	new file:   tests/serverqueue-test/Makefile
	new file:   tests/serverqueue-test/main.cpp
	new file:   tests/serverqueue-test/serverqueuetest.cpp
	new file:   tests/serverqueue-test/serverqueuetest.h