Merge into master from pull request #95:

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

.../net/floodlightcontroller/core/internal/OFSwitchImpl.java

...lightcontroller/core/web/AllSwitchStatisticsResource.java

...net/floodlightcontroller/core/web/SwitchResourceBase.java

...oodlightcontroller/core/web/SwitchStatisticsResource.java

...ightcontroller/learningswitch/ILearningSwitchService.java

...t/floodlightcontroller/learningswitch/LearningSwitch.java

...odlightcontroller/learningswitch/LearningSwitchTable.java

...tcontroller/learningswitch/LearningSwitchWebRoutable.java

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

...oodlightcontroller/learningswitch/LearningSwitchTest.java