1. Added SegmentRoutingManager so that it can spawn any required objects such as ArpHandler or IcmpHandler
 2. Added ArpHandler.java so that it handles any ICMP request for any known host

Change-Id: Ifd93318dc4c67fde2fce2fde04fa9df33d231e41
diff --git a/src/main/java/net/onrc/onos/core/topology/Host.java b/src/main/java/net/onrc/onos/core/topology/Host.java
index 4e0c2e4..eda41ae 100644
--- a/src/main/java/net/onrc/onos/core/topology/Host.java
+++ b/src/main/java/net/onrc/onos/core/topology/Host.java
@@ -23,6 +23,14 @@
     public MACAddress getMacAddress();
 
     /**
+     * Gets the Host IP address.
+     *
+     * @return the Host IP address.
+     */
+    public int getIpAddress();
+
+
+    /**
      * Gets the Host attachment points.
      * <p/>
      * TODO: There is only 1 attachment point right now.