Finishing with FIB initialization based on IPv4 global routing controller

Example ccnx-routing-simple.cc shows all necessary steps to make it work.
diff --git a/model/ccnx-l3-protocol.h b/model/ccnx-l3-protocol.h
index c4d4f29..5b57ee0 100644
--- a/model/ccnx-l3-protocol.h
+++ b/model/ccnx-l3-protocol.h
@@ -144,6 +144,9 @@
 
   virtual void
   RemoveFace (Ptr<CcnxFace> face);
+
+  virtual Ptr<CcnxFace>
+  GetFaceByNetDevice (Ptr<NetDevice> netDevice) const;
   
   Ptr<CcnxPit> GetPit();
 protected: