Sub\Unsub methods removed where not necessary
Add Freelance Pattern - Model One sample

Add "Brokerless Reliability (Freelance Pattern) - Model One" client and
server sample applications
Unused settings file deleted
Wrong message

Wrong message Modified into Freelance.ModelOne.Server Main method
I restored Subscriber methods into NetMQSocket with the Obsolete
attribute.
I added "new" keyword at Subscribe methods into SubscriberSocket and
XSubscriberSocket.
Add samples to "Load Balancing Pattern":
- ROUTER Broker and REQ Workers
- ROUTER Broker and DEALER Workers
Merge pull request #85 from GianniBortoloBossini/master

Removed Subscribe/Unsubscribe methods for socket classes where not necessary