Create RoutingManager that is separate from TopologyManger. It hooks into TopologyManager via new ITopologyManagerBackend, butmakes it much more obvious that the TopologyManger and TopologyInstance is responsible for much of the routing. Before this change, the actual 'routing' and 'path-finding' implementation location wasn't very clear.

More REST API updates. Added JsonObjectWrapper class to wrap types that Jackson will serialize into arrays (illegal if outer type in JSON).

compute() has been optimized and all old code is gone. We no longer need to compute trees for each cluster. Furthermore, the computation of broadcast ports has been streamlined. Other routing/topology refactoring has been done as well.

Transferred over all of the Yen's algorithm additions. This includes getRoutes(). Some additions may have been missed.