Feature: Added CLI options

@vs-ab @jtsoi  could you take a look please 

    [coco@demo.virtusize.com:~/virtusize/cron]$ ./copper-agent.py --dry --key flgXzL9xLaT6AF6c -n 2 --host demo
    DRY mode, no changes made.
    {"totalthreads": 15, "requestsinqueue": 0, "memoryused": 52547584, "idlethreads": 15}
    {"timestamp": 1407739524, "identifier": "demo_11001", "values": {"totalthreads": 15, "requestsinqueue": 0, "memoryused": 52547584, "idlethreads": 15}}
    {"totalthreads": 15, "requestsinqueue": 0, "memoryused": 52531200, "idlethreads": 15}
    {"timestamp": 1407739524, "identifier": "demo_11002", "values": {"totalthreads": 15, "requestsinqueue": 0, "memoryused": 52531200, "idlethreads": 15}}

Yes. but you right intention should be fixed