Fix Device Manager entity handling code [BSC-2046] (https://github.com/floodlight/floodlight/pull/204)

During flow reconciliation, device manager should not call learnDeviceByEntity, which would incorrectly update timestamps of entities existing in flow cache. It should call findDeviceByEntity instead.

Opcodes for RARP in ARP.java (https://github.com/floodlight/floodlight/pull/203)

Getting rid of warnings in generated thrift code. (https://github.com/floodlight/floodlight/pull/202)

Workaroudn to get rid of warnings in generated thrift code.
Modify gen-thrift ant target to add a SupressWarnings("all") to all
generated java file (we do a regex replace.)

Also retab'ed build.xml file

IPv4.java - Add static method for IPv4 from int to byte[]. (https://github.com/floodlight/floodlight/pull/201)

DeviceManager and entity classification updates/fixes

If we cannot find an entity in the primary index we need to
classify it into an IEntityClass and the search in the class index.

* Fixed couple of bugs in Device.getIPv4Addresses().
* Add more debugging output to DeviceManagerImpl

updated CLI (https://github.com/floodlight/floodlight/pull/199)

* implement findDestDeviveByEntity()
* findDevice() and findDestDevice() will now throw an exception of the
  supplied fields are not sufficient for the lookup
* test and comment polishing
* reorganizing testing code

[BSC-1838]

Make getLinkType() in LinkDiscoveryManager public. (https://github.com/floodlight/floodlight/pull/198)

Re-add getLinkType() into LinkDiscoveryManager. (https://github.com/floodlight/floodlight/pull/197)

making it possible to get LinkType information both from LinkInfo.getLin... (https://github.com/floodlight/floodlight/pull/196)

The Web UI now has icons and stuff (https://github.com/floodlight/floodlight/pull/195)

(These icons were designed from scratch by me with ASL 2.0 license.)
Nodes are now labeled with their name (DPID or IP+MAC).
Added a hack to ignore multiple attachment points for hosts, since
Floodlight's concept of attachment points doesn't correspond to the
physical topology.

Fix a NPE in injectOFMessage

Added less confusing constructor for OFActionOutput (https://github.com/floodlight/floodlight/pull/193)

and associated javadocs

[BSC-1838]

* IEntityClassifier only returns a single entity class per entity and all
  entities of a device must belong to the same entity class. Semantics for
  multiple classes was unclear.

* IEntityClassifier is now an IFloodlightService to have a cleaner way of
  setting the classifier to use (the classifier needs to be set before
  DeviceManager.startUp() is called).

[BSC-1838]

	Fix an issue with static flow entry pusher where it was not correctly (https://github.com/floodlight/floodlight/pull/192)

Don't set role again if it's the same. Partial fix for BSC-1835 (https://github.com/floodlight/floodlight/pull/190)