Add 5 seconds for attachment point change from one broadcast domain to another.  When the attachment points flap quickly, the controller should avoid learing the attachment point but should continue processing the packet.

Device manager will have a 5-second time gap to change an attachment point for a host from one broadcast domain to another.

Conflicts:
	src/main/java/net/floodlightcontroller/linkdiscovery/internal/LinkDiscoveryManager.java

Reduce log level of some messages (https://github.com/floodlight/floodlight/pull/72)

Fix a broadcast issue in looped topologies.

broadcast ARP if cluster doesn't know dst device's AP (https://github.com/floodlight/floodlight/pull/70)

Introduce a convenience method inSameIsland, which is the same as inSameCluster.  In future, they may have different functionalities.

Introduce a method called isConsistent(..) that compares an old attachment and a new attachment point. If the new attachment point is not consistent with the old one, then it has to be learnt by the device manager.

Removing prints not through logger (https://github.com/floodlight/floodlight/pull/69)

Fix a bug for checking BDDP packet if the packet is not unicast for it to continue down the processing chain.

If the incoming node port is blocked, allow only unicast and BDDP packets to continue down the processing chain.

Add a method to TopologyService (https://github.com/floodlight/floodlight/pull/67)

DeviceManager REST API take two (https://github.com/floodlight/floodlight/pull/68)

When the device manager gets cleaned up (or when during topologyChanged), it should consider the time difference between switching from broadcast to non-broadcast attachment points (as they might be previously on two different switches).

Added a DeviceManager REST API. You can use this to see what devices the controller has learned along with their IPs and attachment points.

Conflicts:

	src/main/java/net/floodlightcontroller/devicemanager/internal/DeviceManagerImpl.java

Some cleanup and bug fix in topology

Only remove flows on move when the cookie is from forwarding (https://github.com/floodlight/floodlight/pull/65)

fix eclipse environment (https://github.com/floodlight/floodlight/pull/64)

Device manager should implement ITopologyListener to clear out attachment points when topology changes.

(1) Device manager will drop packets (as the first step) if the topology indicates the packet-in port is not allowed for incoming transmissions. (2) Remove a log message from LinkDiscoveryManager. (3) Topology provides a service called isAllowed() that indicates if the port is enabled for incoming and outgoing traffic.  (4) Tests are modified accordingly.