Many corrections to face/local-face/net-device-face/fib/pit.  Now
interest packets actually go down to ccnx stack.  Also, now it is
possible to manually configure FIB entries.

CcnxFib now is an object aggregated to the node
diff --git a/model/ccnx-forwarding-strategy.cc b/model/ccnx-forwarding-strategy.cc
index 112a9bf..b2aa342 100644
--- a/model/ccnx-forwarding-strategy.cc
+++ b/model/ccnx-forwarding-strategy.cc
@@ -34,9 +34,9 @@
   return tid;
 }
 
-CcnxForwardingStrategy::CcnxForwardingStrategy ()
+CcnxForwardingStrategy::CcnxForwardingStrategy (Ptr<CcnxFib> fib)
 {
-  m_fib = CreateObject<CcnxFib> ();
+  m_fib = fib;
 }