Check special ports using loxi, not using bitmasks

Improve Forwarding link/port down handler

Forwarding tweaks

Each hop of path should optionally ignore in-port in flow match

Add detailed-match property to Forwarding

Fix forwarding bug

Add new detailed-match property to define source and destination addresses to match on in each layer. Also add in-port as an optional match for the existing match property.

Fix utilization link costs

Next round of topology updates

Don't use statistics service to get link speed. This can be derived from the IOSwitchService more efficiently. Remove link speed function from IStatisticsService.

Major topology/routing improvements

Change log levels of frequent, unnecessary logs to debug. Were previously warn. Add new RoutingManager to properties

Restrict access to TopologyInstance constructor and compute() functions. Other public functions should also be changed to private or protected.

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.

Next round of refactoring. Attempting to normalize the terminology used. Fixed some bugs that have been around for a while too.