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/ipv4-global-routing-ordered-nexthops.h b/model/ipv4-global-routing-ordered-nexthops.h
index b52779e..1ae8713 100644
--- a/model/ipv4-global-routing-ordered-nexthops.h
+++ b/model/ipv4-global-routing-ordered-nexthops.h
@@ -47,7 +47,7 @@
  */
 class Ipv4GlobalRoutingOrderedNexthops : public Ipv4GlobalRouting
 {
-private:
+public:
   class i_iface {};
   class i_metric {};
   class i_index {};
@@ -109,6 +109,9 @@
 
   virtual void DeleteRoutes ();
 
+  const Ptr<EntryContainer>
+  Lookup (Ipv4Address dest);
+
 protected:
   virtual Ptr<Ipv4Route> LookupGlobal (Ipv4Address dest, Ptr<NetDevice> oif = 0);