Update of tracing

In CcnxForwardingStrategy (connect using "/NodeList/*/$ns3::CcnxL3Protocol/ForwardingStrategy/<trace>":
(interests)
- OutInterests

In Ccnx (connect using "/NodeList/*/$ns3::CcnxL3Protocol/<trace>":
(interests)
- InInterests
- DropInterests
(nacks)
- OutNacks
- InNacks
- DropNacks
(data)
- OutData
- InData
- DropData
diff --git a/model/ccnx-flooding-strategy.cc b/model/ccnx-flooding-strategy.cc
index 4a8dd50..5b8542d 100644
--- a/model/ccnx-flooding-strategy.cc
+++ b/model/ccnx-flooding-strategy.cc
@@ -19,10 +19,13 @@
  */
 
 #include "ccnx-flooding-strategy.h"
+#include "ccnx-interest-header.h"
+#include "ccnx-pit.h"
+#include "ccnx-pit-entry.h"
+
 #include "ns3/assert.h"
 #include "ns3/log.h"
 #include "ns3/simulator.h"
-#include "ccnx-interest-header.h"
 
 #include <boost/ref.hpp>
 #include <boost/foreach.hpp>
@@ -114,6 +117,7 @@
       //   }
 
       metricFace.m_face->Send (packet->Copy ());
+      m_transmittedInterestsTrace (header, metricFace.m_face);
       
       propagatedCount++;
     }