Merge into master from pull request #175:

...tcontroller/devicemanager/internal/DeviceManagerImpl.java

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

src/main/java/net/floodlightcontroller/util/MACAddress.java

...net/floodlightcontroller/virtualnetwork/HostResource.java

.../floodlightcontroller/virtualnetwork/NetworkResource.java

...in/java/net/floodlightcontroller/virtualnetwork/NoOp.java

...dlightcontroller/virtualnetwork/VirtualNetworkFilter.java

...tcontroller/virtualnetwork/VirtualNetworkWebRoutable.java

...es/net.floodlightcontroller.core.module.IFloodlightModule

src/main/resources/quantum.properties

...htcontroller/virtualnetwork/VirtualNetworkFilterTest.java