Built REST APIs to look at the in-memory network graph state.
Amended to clean up serializer code.

Change-Id: Ie020d1173fa108eec12e324e3ae37353c7ca8a00
diff --git a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/Port.java b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/Port.java
index ae955d1..753532f 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/Port.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/Port.java
@@ -12,6 +12,7 @@
 public interface Port {
 	public Long getNumber();
 	public Long getHardwareAddress();
+	public String getDescription();
 
 	public Switch getSwitch();