Initial OF1.3 handshake and basic Hub module working

...in/java/net/floodlightcontroller/core/NullConnection.java

...main/java/net/floodlightcontroller/core/OFConnection.java

src/main/java/net/floodlightcontroller/core/OFSwitch.java

...va/net/floodlightcontroller/core/internal/Controller.java

...loodlightcontroller/core/internal/ControllerCounters.java

...t/floodlightcontroller/core/internal/OFSwitchManager.java

...va/net/floodlightcontroller/core/web/CounterResource.java

.../floodlightcontroller/flowcache/FlowReconcileManager.java

...et/floodlightcontroller/flowcache/FlowReconcileQuery.java

...a/net/floodlightcontroller/loadbalancer/LoadBalancer.java

...java/net/floodlightcontroller/routing/ForwardingBase.java