Merge pull request #224 from sriniram/master

...tcontroller/core/web/serializers/LinkTupleSerializer.java

...et/floodlightcontroller/linkdiscovery/ILinkDiscovery.java

...dlightcontroller/linkdiscovery/ILinkDiscoveryService.java

...java/net/floodlightcontroller/linkdiscovery/LinkInfo.java

...ava/net/floodlightcontroller/linkdiscovery/LinkTuple.java

...t/floodlightcontroller/linkdiscovery/SwitchPortTuple.java

...ntroller/linkdiscovery/internal/LinkDiscoveryManager.java

...floodlightcontroller/linkdiscovery/web/LinksResource.java

src/main/java/net/floodlightcontroller/packet/BSN.java

src/main/java/net/floodlightcontroller/routing/Link.java

...java/net/floodlightcontroller/topology/NodePortTuple.java

...ller/linkdiscovery/internal/LinkDiscoveryManagerTest.java